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Flow structures of gaseous jets injected into water for underwater propulsion 被引量:33
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作者 Jia-Ning Tang Ning-Fei Wang Wei Shyy 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2011年第4期461-472,共12页
Gaseous jets injected into water are typically found in underwater propulsion, and the flow is essentially unsteady and turbulent. Additionally, the high water-to-gas density ratio can result in complicated flow struc... Gaseous jets injected into water are typically found in underwater propulsion, and the flow is essentially unsteady and turbulent. Additionally, the high water-to-gas density ratio can result in complicated flow structures; hence measuring the flow structures numerically and experimentally remains a challenge. To investigate the performance of the underwater propulsion, this paper uses detailed NavierStokes flow computations to elucidate the gas-water interactions under the framework of the volume of fluid (VOF) model. Furthermore, these computations take the fluid compressibility, viscosity, and energy transfer into consideration. This paper compares the numerical results and experimental data, showing that phenomena including expansion, bulge, necking/breaking, and back-attack are highlighted in the jet process. The resulting analysis indicates that the pressure difference on the rear and front surfaces of the propul- sion system can generate an additional thrust. The strong and oscillatory thrust of the underwater propulsion system is caused by the intermittent pulses of the back pressure and the nozzle exit pressure. As a result, the total thrust in underwater propulsion is not only determined by the nozzle geometry but also by the flow structures and associated pressure distri- butions. 展开更多
关键词 gaseous jets - Underwater propulsion Highdensity ratio gas-water interactions
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Methane and nitrous oxide concentration and emission flux of Yangtze Delta plain river net 被引量:21
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作者 WANG DongQi CHEN ZhenLou +2 位作者 SUN WeiWei HU BeiBei XU ShiYuan 《Science China Chemistry》 SCIE EI CAS 2009年第5期652-661,共10页
Methane (CH4) and nitrous oxide (N2O) saturation concentration and gas-water interface emission flux in surface water of the Yangtze Delta plain river net were investigated in summer at representative sites including ... Methane (CH4) and nitrous oxide (N2O) saturation concentration and gas-water interface emission flux in surface water of the Yangtze Delta plain river net were investigated in summer at representative sites including the upper reaches of the Huangpu River and the rivers in the Chongming Island. The results show that the CH4 concentration in river water ranged from 0.30±0.03 to 6.66±0.14 μmol.L-1, and N2O concentration ranged from 13.8±2.33 to 435±116 nmol.L-1. River surface water had a very high satura- tion level of CH4 (from 468±49.0% to 11560±235%) and that of N2O (from 175±29.5% to 4914±1304%). Dissolved oxygen (DO) was the primary factor controlling the CH4 concentration in water. N2O concentration had significant negative correlation with salinity and a significant positive correlation with nitrate (NO3-), nitrite (NO2-), chemical oxygen demand (CODcr) concentration and pH of river water. CH4 and N2O of river water were brought about mainly by methanogenesis and denitrification in river bottom sediment that diffused through sediment-water interface into the water body and then into atmosphere through the gas-water interface. The emission flux of CH4 and N2O at river gas-water interface reached 778±59.8 and 236±63.6 μmol.m-2.h-1, respectively in summer. The river net was a potential source of atmospheric CH4 and N2O because of eutrophication of the water body. 展开更多
关键词 plain river NET CH4 N2O CONCENTRATION gas-water interface emission flux
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油、气、水三相水平井流入动态预测模型及其应用 被引量:10
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作者 董长银 姬生柱 王希涛 《石油大学学报(自然科学版)》 EI CSCD 北大核心 2005年第3期70-74,共5页
目前关于水平井流入动态(IPR)的研究仅限于溶解气驱的情况,还没有适合于油、气、水三相和整个油藏压力范围的水平井IPR模型。首先对现有的4种溶解气驱IPR方程进行了筛选,以Cheng和刘想平的方程为基础,建立了适用于油藏压力高于饱和压力... 目前关于水平井流入动态(IPR)的研究仅限于溶解气驱的情况,还没有适合于油、气、水三相和整个油藏压力范围的水平井IPR模型。首先对现有的4种溶解气驱IPR方程进行了筛选,以Cheng和刘想平的方程为基础,建立了适用于油藏压力高于饱和压力的不含水组合型水平井IPR模型。采用纯油与纯水IPR曲线加权平均得到综合IPR曲线的方法,将组合型IPR方程扩展到油、气、水三相的情况,建立了适用于油、气、水三相和整个油藏压力范围的水平井IPR模型,并对水平井流入动态预测计算方法进行了研究。利用该模型可以计算采液指数、产量和井底流压以及绘制IPR曲线等。模型及软件已应用于大庆肇州油田低渗水平井的流入动态预测,效果良好。 展开更多
关键词 水平井 流入动态 IPR 溶解气驱 预测模型 油藏压力 采油工艺
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鄂尔多斯盆地杭锦旗区块油气水分布及主控因素分析 被引量:11
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作者 胡永章 卢刚 +2 位作者 王毅 王洪辉 段新国 《成都理工大学学报(自然科学版)》 CAS CSCD 北大核心 2009年第2期128-132,共5页
通过对鄂尔多斯盆地北部杭锦旗区块油气水层测井响应特征的研究,建立油气水层的测井识别标志。在应用多组逐步判别分析方法对油气水层进行划分的基础上,对单井油气水层的纵、横向分布特征以及横向展布规律进行研究,指出有利的油气富集区... 通过对鄂尔多斯盆地北部杭锦旗区块油气水层测井响应特征的研究,建立油气水层的测井识别标志。在应用多组逐步判别分析方法对油气水层进行划分的基础上,对单井油气水层的纵、横向分布特征以及横向展布规律进行研究,指出有利的油气富集区,得出储集层的岩性、生储盖的组合配置关系、局部构造的发育情况以及断层分布是影响研究区内油气水层分布的主要控制因素。 展开更多
关键词 鄂尔多斯盆地 杭锦旗 油气水分布 控制因素
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Microscopic experiment on efficient construction of underground gas storages converted from water-invaded gas reservoirs
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作者 JIANG Tongwen QI Huan +4 位作者 WANG Zhengmao LI Yiqiang WANG Jinfang LIU Zheyu CAO Jinxin 《Petroleum Exploration and Development》 SCIE 2024年第1期203-212,共10页
Based on the microfluidic technology,a microscopic visualization model was used to simulate the gas injection process in the initial construction stage and the bottom water invasion/gas injection process in the cyclic... Based on the microfluidic technology,a microscopic visualization model was used to simulate the gas injection process in the initial construction stage and the bottom water invasion/gas injection process in the cyclical injection-production stage of the underground gas storage(UGS)rebuilt from water-invaded gas reservoirs.Through analysis of the gas-liquid contact stabilization mechanism,flow and occurrence,the optimal control method for lifecycle efficient operation of UGS was explored.The results show that in the initial construction stage of UGS,the action of gravity should be fully utilized by regulating the gas injection rate,so as to ensure the macroscopically stable migration of the gas-liquid contact,and greatly improve the gas sweeping capacity,providing a large pore space for gas storage in the subsequent cyclical injection-production stage.In the cyclical injection-production stage of UGS,a constant gas storage and production rate leads to a low pore space utilization.Gradually increasing the gas storage and production rate,that is,transitioning from small volume to large volume,can continuously break the hydraulic equilibrium of the remaining fluid in the porous media,which then expands the pore space and flow channels.This is conducive to the expansion of UGS capacity and efficiency for purpose of peak shaving and supply guarantee. 展开更多
关键词 water-invaded gas-reservoir underground gas storage cyclical injection-production gas-water contact gas storage and production rate UGS capacity expansion control method
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气液滑动弧等离子体降解高浓度有机废水的研究 被引量:7
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作者 李晓东 杜长明 +2 位作者 严建华 岑可法 B G Cheron 《工程热物理学报》 EI CAS CSCD 北大核心 2006年第z2期237-239,共3页
采用气液滑动弧放电非平衡等离子体进行降解高浓度苯酚模拟废水(初始浓度为872 mg/L)的研究。实验研究表明:由于液滴的存在改变了电极间的介电常数和局部电场,气液滑动弧放电的电压波形比纯气流滑动弧放电更加不规则,起弧电压更低;采... 采用气液滑动弧放电非平衡等离子体进行降解高浓度苯酚模拟废水(初始浓度为872 mg/L)的研究。实验研究表明:由于液滴的存在改变了电极间的介电常数和局部电场,气液滑动弧放电的电压波形比纯气流滑动弧放电更加不规则,起弧电压更低;采用氧气作为载气能提高苯酚的降解效果,最后TOC值为44 mg/L;增大气液混合比,相应的加强了废水的雾化效果,增大水气接触表面积,进而提高了苯酚的降解效果;在尾气中检测到CO2的存在,最高浓度达到35357 mg/m3。 展开更多
关键词 滑动弧放电 非平衡等离子体 气液混合体 废水 总有机碳
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Pore-Throat Combination Types and Gas-Water Relative Permeability Responses of Tight Gas Sandstone Reservoirs in the Zizhou Area of East Ordos Basin, China 被引量:5
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作者 LI Mi GUO Yinghai +2 位作者 LI Zhuangfu WANG Huaichang ZHANG Jingxia 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2019年第3期622-636,共15页
With the aim of better understanding the tight gas reservoirs in the Zizhou area of east Ordos Basin,a total of 222 samples were collected from 50 wells for a series of experiments.In this study,three pore-throat comb... With the aim of better understanding the tight gas reservoirs in the Zizhou area of east Ordos Basin,a total of 222 samples were collected from 50 wells for a series of experiments.In this study,three pore-throat combination types in sandstones were revealed and confirmed to play a controlling role in the distribution of throat size and the characteristics of gas-water relative permeability.The type-I sandstones are dominated by intercrystalline micropores connected by cluster throats,of which the distribution curves of throat size are narrow and have a strong single peak(peak ratio>30%).The pores in the type-II sandstones dominantly consist of secondary dissolution pores and intercrystalline micropores,and throats mainly occur as slice-shaped throats along cleavages between rigid grain margins and cluster throats in clay cement.The distribution curves of throat size for the type-II sandstones show a bimodal distribution with a substantial low-value region between the peaks(peak ratio<15%).Primary intergranular pores and secondary intergranular pores are mainly found in type-III samples,which are connected by various throats.The throat size distribution curves of type-III sandstones show a nearly normal distribution with low kurtosis(peak ratio<10%),and the micro-scale throat radii(>0.5μm)constitute a large proportion.From type-I to type-III sandstones,the irreducible water saturation(Swo)decreased;furthermore,the slope of the curves of Krw/Krg in two-phase saturation zone decreased and the two-phase saturation zone increased,indicating that the gas relative flow ability increased.Variations of the permeability exist in sandstones with different porethroat combination types,which indicate the type-III sandstones are better reservoirs,followed by type-II sandstones and type-I sandstones.As an important factor affecting the reservoir quality,the pore-throat combination type in sandstones is the cumulative expression of lithology and diagenetic modifications with strong heterogeneity. 展开更多
关键词 tight gas sandstone pore-throat COMBINATION type THROAT characteristic gas-water relative permeability Zizhou area ORDOS Basin
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Gas-water stratified flow patterns from electromagnetic tomography 被引量:7
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作者 Wang Xiaoxing Wu Xiling 《Petroleum Science》 SCIE CAS CSCD 2009年第3期254-258,共5页
Because of gravitational differentiation of multi-phase fluids, gas-water flow is usually stratified in highly inclined or horizontal gas wells. By using electrode arrays to scan flowing fluids, electromagnetic tomogr... Because of gravitational differentiation of multi-phase fluids, gas-water flow is usually stratified in highly inclined or horizontal gas wells. By using electrode arrays to scan flowing fluids, electromagnetic tomography can identify the flow patterns of mixed fluid from the different electrical properties of gas and water. The responses for different gas-water interface locations were calculated and then physical measurements were undertaken. We compared the results of the numerical simulation with the experimental data, and found that the response characteristics were consistent in the circumstances of uniform physical fields and stratified flows. By analyzing the signal characteristics, it is found that, with the change of the interface location, the response curves showed "steps" whose position and width were decided by the location of fluid interface. The measurement accuracy of this method depended on the vertical distance between adjacent electrodes. The results showed that computer simulation can simulate the measurement of the electromagnetic tomography accurately, so the physical experiment can be replaced. 展开更多
关键词 Electromagnetic tomography stratified flow gas-water numerical simulation physical experiment
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Rate transient analysis methods for water-producing gas wells in tight reservoirs with mobile water
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作者 Qingyan Yu Ying Jia +2 位作者 Pengcheng Liu Xiangyang Hu Shengye Hao 《Energy Geoscience》 EI 2024年第1期311-320,共10页
Tight gas reservoirs with mobile water exhibit multi-phase flow and high stress sensitivity.Accurately analyzing the reservoir and well parameters using conventional single-phase rate transient analysis methods proves... Tight gas reservoirs with mobile water exhibit multi-phase flow and high stress sensitivity.Accurately analyzing the reservoir and well parameters using conventional single-phase rate transient analysis methods proves challenging.This study introduces novel rate transient analysis methods incorporating evaluation processes based on the conventional flowing material balance method and the Blasingame type-curve method to examine fractured gas wells producing water.By positing a gas-water two-phase equivalent homogenous phase that considers characteristics of mobile water,gas,and high stress sensitivity,the conventional single-phase rate transient analysis methods can be applied by integrating the phase's characteristics and defining the phase's normalized parameters and material balance pseudotime.The rate transient analysis methods based on the equivalent homogenous phase can be used to quantitatively assess the parameters of wells and gas reservoirs,such as original gas-in-place,fracture half-length,reservoir permeability,and well drainage radius.This facilitates the analysis of production dynamics of fractured wells and well-controlled areas,subsequently aiding in locating residual gas and guiding the configuration of well patterns.The specific evaluation processes are detailed.Additionally,a numerical simulation mechanism model was constructed to verify the reliability of the developed methods.The methods introduced have been successfully implemented in field water-producing gas wells within tight gas reservoirs containing mobile water. 展开更多
关键词 gas reservoirs with mobile water gas-water two phase flow High stress sensitivity Equivalent homogenous phase Rate transient analysis
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MRI insight on multiphase flow in hydrate-bearing sediment and development mechanism of hydrate seal 被引量:1
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作者 Guo-Jun Zhao Ming-Jun Yang +2 位作者 Xin Lv Jia-Nan Zheng Yong-Chen Song 《Petroleum Science》 SCIE EI CAS CSCD 2023年第6期3854-3864,共11页
Gas and water migration through the hydrate-bearing sediment are characteristic features in marine gas hydrate reservoirs worldwide.However,there are few experimental investigations on the effect of water-gas flow on ... Gas and water migration through the hydrate-bearing sediment are characteristic features in marine gas hydrate reservoirs worldwide.However,there are few experimental investigations on the effect of water-gas flow on the gas hydrate reservoir.In this study,gas-water migration in gas hydrate stability zone(GHSZ)was investigated visually employing a high-resolution magnetic resonance imaging(MRI)apparatus,and the formation of hydrate seal was experimentally investigated.Results revealed that normal flow of gas-water at the low flow rate of 1–0.25 mL/min will induce the hydrate reformation.Conversely,higher gas-water flow rates(at 2–0.5 and 4–1 mL/min)need higher reservoir pressure to induce the hydrate reformation.In addition,the hydrate reformation during the gas-water flow process produced the hydrate seal,which can withstand an over 9.0 MPa overpressure.This high overpressure provides the development condition for the underlying gas and/or water reservoir.A composite MRI image of the whole hydrate seal was obtained through the MRI.The pore difference between hydrate zone and coexistence zone produces a capillary sealing effect for hydrate seal.The hydrate saturation of hydrate seal was more than 51.6%,and the water saturation was more than 19.3%.However,the hydrate seal can be broken through when the overpressure exceeded the capillary pressure of the hydrate seal,which induced the sudden drop of reservoir pressure.This study provides a scientific explanation for the existence of high-pressure underlying gas below the hydrate layer and is significant for the safe exploitation of these common typical marine hydrate reservoirs. 展开更多
关键词 gas hydrate gas-water migration Underlying gas Hydrate seal Pore difference MRI
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Simulation of Two-Phase Flowback Phenomena in Shale Gas Wells
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作者 Yongwei Duan Zhaopeng Zhu +2 位作者 Hui He Gaoliang Xuan Xuemeng Yu 《Fluid Dynamics & Materials Processing》 EI 2024年第2期349-364,共16页
The gas-water two-phaseflow occurring as a result of fracturingfluidflowback phenomena is known to impact significantly the productivity of shale gas well.In this work,this two-phaseflow has been simulated in the framework... The gas-water two-phaseflow occurring as a result of fracturingfluidflowback phenomena is known to impact significantly the productivity of shale gas well.In this work,this two-phaseflow has been simulated in the framework of a hybrid approach partially relying on the embedded discrete fracture model(EDFM).This model assumes the region outside the stimulated reservoir volume(SRV)as a single-medium while the SRV region itself is described using a double-medium strategy which can account for thefluid exchange between the matrix and the micro-fractures.The shale gas adsorption,desorption,diffusion,gas slippage effect,fracture stress sensitivity,and capillary imbibition have been considered.The shale gas production,pore pressure distribution and water saturation distribution in the reservoir have been simulated.The influences of hydraulic fracture geometry and nonorthogonal hydraulic fractures on gas production have been determined and discussed accordingly.The simulation results show that the daily gas production has an upward and downward trend due to the presence of a large amount of fracturingfluid in the reservoir around the hydraulic fracture.The smaller the angle between the hydraulic fracture and the wellbore,the faster the daily production of shale gas wells decreases,and the lower the cumulative production.Nonplanar fractures can increase the control volume of hydraulic fractures and improve the production of shale gas wells. 展开更多
关键词 Shale gas fracturingfluid backflow the stimulated reservoir volume gas-water two-phase production
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Integrated numerical simulation of hydraulic fracturing and production in shale gas well considering gas-water two-phase flow
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作者 TANG Huiying LUO Shangui +4 位作者 LIANG Haipeng ZENG Bo ZHANG Liehui ZHAO Yulong SONG Yi 《Petroleum Exploration and Development》 SCIE 2024年第3期684-696,共13页
Based on the displacement discontinuity method and the discrete fracture unified pipe network model,a sequential iterative numerical method was used to build a fracturing-production integrated numerical model of shale... Based on the displacement discontinuity method and the discrete fracture unified pipe network model,a sequential iterative numerical method was used to build a fracturing-production integrated numerical model of shale gas well considering the two-phase flow of gas and water.The model accounts for the influence of natural fractures and matrix properties on the fracturing process and directly applies post-fracturing formation pressure and water saturation distribution to subsequent well shut-in and production simulation,allowing for a more accurate fracturing-production integrated simulation.The results show that the reservoir physical properties have great impacts on fracture propagation,and the reasonable prediction of formation pressure and reservoir fluid distribution after the fracturing is critical to accurately predict the gas and fluid production of the shale gas wells.Compared with the conventional method,the proposed model can more accurately simulate the water and gas production by considering the impact of fracturing on both matrix pressure and water saturation.The established model is applied to the integrated fracturing-production simulation of practical horizontal shale gas wells.The simulation results are in good agreement with the practical production data,thus verifying the accuracy of the model. 展开更多
关键词 shale gas well hydraulic fracturing fracture propagation gas-water two-phase flow fracturing-production integrated numerical simulation
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Simulation of Gas-Water Two-Phase Flow in Tight Gas Reservoirs Considering the Gas Slip Effect
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作者 Mingjing Lu Zenglin Wang +3 位作者 Aishan Li Liaoyuan Zhang Bintao Zheng Zilin Zhang 《Fluid Dynamics & Materials Processing》 EI 2023年第5期1269-1281,共13页
A mathematical model for the gas-water two-phase flow in tight gas reservoirs is elaborated.The model can account for the gas slip effect,stress sensitivity,and high-speed non-Darcy factors.The related equations are s... A mathematical model for the gas-water two-phase flow in tight gas reservoirs is elaborated.The model can account for the gas slip effect,stress sensitivity,and high-speed non-Darcy factors.The related equations are solved in the framework of a finite element method.The results are validated against those obtained by using the commercial software CMG(Computer Modeling Group software for advanced recovery process simulation).It is shown that the proposed method is reliable.It can capture the fracture rejection characteristics of tight gas reservoirs better than the CMG.A sensitivity analysis of various control factors(initial water saturation,reservoir parameters,and fracturing parameters)affecting the production in tight gas wells is conducted accordingly.Finally,a series of theoretical arguments are provided for a rational and effective development/exploitation of tight sandstone gas reservoirs. 展开更多
关键词 Tight gas reservoir gas-water two-phase flow numerical simulation fractured horizontal well gas slip effect
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Experimental study of the effects of a multistage pore-throat structure on the seepage characteristics of sandstones in the Beibuwan Basin:Insights into the flooding mode
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作者 Lei Wang Xiao Lei +7 位作者 Qiao-Liang Zhang Guang-Qing Yao Bo Sui Xiao-Jun Chen Ming-Wei Wang Zhen-Yu Zhou Pan-Rong Wang Xiao-Dong Peng 《Petroleum Science》 SCIE EI CAS CSCD 2024年第2期1044-1061,共18页
To investigate the relationship between grain sizes, seepage capacity, and oil-displacement efficiency in the Liushagang Formation of the Beibuwan Basin, this study identifies the multistage pore-throat structure as a... To investigate the relationship between grain sizes, seepage capacity, and oil-displacement efficiency in the Liushagang Formation of the Beibuwan Basin, this study identifies the multistage pore-throat structure as a crucial factor through a comparison of oil displacement in microscopic pore-throat experiments. The two-phase flow evaluation method based on the Li-Horne model is utilized to effectively characterize and quantify the seepage characteristics of different reservoirs, closely relating them to the distribution of microscopic pores and throats. It is observed that conglomerate sandstones at different stages exhibit significant heterogeneity and noticeable differences in seepage capacity, highlighting the crucial role played by certain large pore throats in determining seepage capacity and oil displacement efficiency. Furthermore, it was found that the displacement effects of conglomeratic sandstones with strong heterogeneity were inferior to those of conventional homogeneous sandstone, as evidenced by multiple displacement experiments conducted on core samples with varying granularities and flooding systems. Subsequently, core-based experiments on associated gas flooding after water flooding were conducted to address the challenge of achieving satisfactory results in a single displacement mode for reservoirs with significant heterogeneity. The results indicate that the oil recovery rates for associated gas flooding after water flooding increased by 7.3%-16.4% compared with water flooding alone at a gas-oil ratio of approximately 7000 m^(3)/m^(3). Therefore, considering the advantages of gas flooding in terms of seepage capacity, oil exchange ratio, and the potential for two-phase production, gas flooding is recommended as an energy supplement mode for homogeneous reservoirs in the presence of sufficient gas source and appropriate tectonic angle. On the other hand, associated gas flooding after water flooding is suggested to achieve a more favorable development effect compared to a single mode of energy 展开更多
关键词 Beibuwan Basin Multistage pore-throat structure Multistage seepage characteristics Microscopic visualization HETEROGENEITY gas/water flooding Flooding mode
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海洋平台多相流量计技术现状及发展趋势
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作者 仝英利 刘昊 +3 位作者 陈长钦 萧阳 刘东辉 孙海防 《天津科技》 2024年第8期53-57,共5页
多相流量计是计量油、气、水三相产量数据的重要设备,目前在海洋平台应用的多相流量计种类繁多,其计量原理不同,计量精度和具体应用场景也不同。根据计量原理,将现有多相流量计分为三大类,即分离式多相流量计、放射技术非分离多相流量... 多相流量计是计量油、气、水三相产量数据的重要设备,目前在海洋平台应用的多相流量计种类繁多,其计量原理不同,计量精度和具体应用场景也不同。根据计量原理,将现有多相流量计分为三大类,即分离式多相流量计、放射技术非分离多相流量计和无放射非分离多相流量计,通过分析现有多相流量计技术存在的不足,结合目前海洋平台现场实际需求,展望未来技术发展趋势。 展开更多
关键词 多相流量计 油气水 技术现状 海上生产 发展趋势
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Mechanism of gas-water flow at pore-level in aquifer gas storage 被引量:4
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作者 石磊 王皆明 +2 位作者 廖广志 熊伟 高树生 《Journal of Central South University》 SCIE EI CAS 2013年第12期3620-3626,共7页
By means of the pore-level simulation, the characteristics of gas-water flow and gas-water distribution during the alternative displacement of gas and water were observed directly from etched-glass micromodel. The res... By means of the pore-level simulation, the characteristics of gas-water flow and gas-water distribution during the alternative displacement of gas and water were observed directly from etched-glass micromodel. The results show that gas-water distribution styles are divided into continuous phase type and separate phase type. The water lock exists in pore and throat during the process of gas-water displacement, and it reduces the gas flow-rate and has some effects on the recovery efficiency during the operation of gas storage. According to the experimental results of aquifer gas storage in X area, the differences in available extent among reservoirs are significant, and the availability of pore space is 33% 45%. 展开更多
关键词 aquifer gas storage gas-water flow injection-withdrawal cycle etched-glass micromodel water lock
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Paleo-oil-Water Contact and Present-Day Gas-Water Contact:Implication for Evolution History of Puguang Gas Field, Sichuan Basin, China 被引量:1
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作者 李平平 邹华耀 +2 位作者 张元春 王存武 张学丰 《Journal of China University of Geosciences》 SCIE CSCD 2008年第6期715-725,共11页
The Puguang (普光) gas field is the largest gas field found in marine carbonate in China. The Puguang gas field experienced complicated evolution history from paleo-oil pool to gas pool. The purpose of this article ... The Puguang (普光) gas field is the largest gas field found in marine carbonate in China. The Puguang gas field experienced complicated evolution history from paleo-oil pool to gas pool. The purpose of this article is to reveal the evolution history of Puguang gas field through systematic study on the relationship between paleo-oil-water contact (POWC) and present-day gas-water contact (PGWC). POWC was recognized by observing the change of relative content of residual solid bitumen in the cores, and PGWC was observed using log and drilling stem test data. Two types of relationship between POWC and PGWC were observed in the Puguang gas field: POWC is above PGWC, and POWC is below PGWC. The former is normal as oil cracking may cause gas-water contact to move downward. The latter can be interpreted by lateral gas re-migration and re-accumulation caused by changes in structural configuration. The relationship between POWC and PGWC suggests that during oil charge, the southwestern and northwestern parts of the Puguang gas field were structurally lower than the northeastern and southeastern parts. Thrusting from Xuefengshan (雪峰山) since Yanshanian movement and from Dabashan (大巴山) since Himalayan movement resulted in the relative uplift of the southwestern and northwestern parts of the Puguang structure, which significantly changed the structural configuration. Based on the paleo-structure discussed in this article, the most probable migration directions of paleo-oil were from the northwest to the southeast and from the southwest to the northeast. Consequently, the evolution history of the Puguang gas field can be divided into three stages, namely,oil charging (200-170 Ma), cracking oil to gas (155-120 Ma), and gas pool adjustment (12-0 Ma). 展开更多
关键词 solid bitumen paleo-oil-water contact present-day gas-water contact Puguang gas field
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辽河盆地双南深层油气开发地质特征与评价 被引量:2
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作者 王国勇 陈洪波 +1 位作者 尹长海 杨纯东 《大庆石油学院学报》 EI CAS 北大核心 1995年第3期47-51,共5页
双南油气田地质条件复杂,油气开采率低,生产状况不佳,通过对双南深层油气田的构造地质特征、储层地质特征及油气水分布规律的详尽分析,对地质特征做出综合评价,寻找出深层油气开发的有利和不利地质因素,提出高效、合理地开发油气的措施... 双南油气田地质条件复杂,油气开采率低,生产状况不佳,通过对双南深层油气田的构造地质特征、储层地质特征及油气水分布规律的详尽分析,对地质特征做出综合评价,寻找出深层油气开发的有利和不利地质因素,提出高效、合理地开发油气的措施,对深层油气田的开发具有一定的指导意义。 展开更多
关键词 油气田 深层油气 地质特征 油气勘探 油矿地质
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油气水三相流动时的产能预测方法研究 被引量:4
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作者 胥元刚 徐波 《西安石油学院学报》 1995年第3期70-71,共2页
为研究溶解气驱油藏油井IPR曲线的计算方法,对达西公式进行了分析,并结合现场实际情况,推出了计算油气水三相流动时产能预测的新公式。经实测数据验证,表明新公式计算精度高,适应性广。
关键词 产能预测 油气水 气驱油藏 三相流动 气压驱动
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保压岩心油、气、水饱和度分析及脱气校正方法 被引量:5
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作者 张宏志 曲斌 张秋 《大庆石油地质与开发》 CAS CSCD 北大核心 1997年第2期47-51,共5页
通过对大庆长垣两口保压取心井油、气、水饱和度分析,绘制了油水饱和度脱气校正图版。经对比,油水饱和度由常规的88%提高到96%以上。脱气校正图版相关系数大于097,相对偏差小于5%,图版精度95%。
关键词 油气层 保压岩心 饱和度 脱气校正
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