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体积压裂缝端压差对页岩储层排驱效果的影响机制
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作者 何延龙 黄海 +4 位作者 唐梅荣 倪军 李华周 TAYFUN babadagli 张轩诚 《中国石油大学学报(自然科学版)》 EI CAS CSCD 北大核心 2024年第6期114-122,共9页
为了明确体积压裂过程中基质孔隙压力与压裂液施加在裂缝端面的压力之间存在的缝端压差对页岩储层渗吸排驱效果的影响,以长7页岩储层岩心为研究对象,开展页岩油高压补能和稳压焖井过程中,不同缝端压差下的渗吸排驱模拟试验,并借助动态... 为了明确体积压裂过程中基质孔隙压力与压裂液施加在裂缝端面的压力之间存在的缝端压差对页岩储层渗吸排驱效果的影响,以长7页岩储层岩心为研究对象,开展页岩油高压补能和稳压焖井过程中,不同缝端压差下的渗吸排驱模拟试验,并借助动态核磁共振检测、实时压力监测和可视化图像分析等手段,阐释缝端压差对页岩储层渗吸排驱效果的影响。结果表明:高压补能阶段存在明显的逆压差逆向渗吸作用,且随着缝端压差的不断增大,高压补能阶段的排液效率逐渐增加,其中以小孔隙中的渗吸排驱作用为主(0~6 MPa时,小孔隙的排液效率分别为33.31%、29.51%、35.65%和64.89%);稳压焖井阶段小孔隙中由于液体排驱压力降低,逆压差逆向渗吸现象不明显,排液过程仍以毛管力作用下的逆向渗吸为主,同时部分大孔隙中的原油渗入小孔隙当中。 展开更多
关键词 缝端压差 页岩油储层 动态渗吸 核磁共振
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Stabilization of nickel nanoparticle suspensions with the aid of polymer and surfactant: static bottle tests and dynamic micromodel flow tests 被引量:1
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作者 Siyuan Yi Tayfun babadagli Huazhou Li 《Petroleum Science》 SCIE CAS CSCD 2020年第4期1014-1024,共11页
Nickel nanoparticles can work as catalyst for the aquathermolysis reactions between water and heavy oil.A homogeneous and stable suspension is needed to carry the nickel nanoparticles into deeper reservoirs.This study... Nickel nanoparticles can work as catalyst for the aquathermolysis reactions between water and heavy oil.A homogeneous and stable suspension is needed to carry the nickel nanoparticles into deeper reservoirs.This study conducts a detailed investigation on how to achieve stabilized nickel nanoparticle suspensions with the use of surfactant and polymer.To stabilize the nickel nanoparticle suspension,three surfactants including sodium dodecyl sulfate,cationic surfactant cetyltrimethylammonium bromide and polyoxyalkalene amine derivative(Hypermer) along with xanthan gum polymer were introduced into the nickel nanoparticle suspension.Static stability tests and zeta potential measurements were conducted to determine the polymer/surfactant recipes yielding the most stable nickel nanoparticle suspensions.Dynamic micromodel flow tests were also conducted on three suspensions to reveal how the nickel nanoparticles would travel and distribute in porous media.Test results showed that when the injection was initiated,most nickel nanoparticles were able to pass through the gaps between the sand grains and produced in the outlet of the micromodel;only a small number of the nickel nanoparticles were attached to the grain surface.A higher nickel concentration in the suspension may lead to agglomeration of nickel nanoparticles in porous media,while a lower concentration can mitigate this agglomeration.Moreover,clusters tended to form when the nickel nanoparticle suspension carried an electrical charge opposite to that of the porous media.Follow-up waterflood was initiated after the nanofluid injection.It was found that the waterflood could not flush away the nanoparticles that were remaining in the micromodel. 展开更多
关键词 Aquathermolysis reactions Nickel nanoparticles Polymer surfactant Suspension stability
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成熟油田开发回顾(一)
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作者 B. babadagli 廉抗利(译) 《国外石油动态》 2007年第12期8-24,共17页
成熟油田的开发业已是(并将越来越是)一个吸弓1人的题目。成熟油田的开发实践可分成两部分:(1)井工程,(2)油藏工程。本文的重点是油藏工程方面。 广泛回顾以前报导的油藏管理做法。按照成熟油田的定义和一般观察,我们可描画... 成熟油田的开发业已是(并将越来越是)一个吸弓1人的题目。成熟油田的开发实践可分成两部分:(1)井工程,(2)油藏工程。本文的重点是油藏工程方面。 广泛回顾以前报导的油藏管理做法。按照成熟油田的定义和一般观察,我们可描画出成熟油田开发的不同方面。涉及的第一个问题是剩余储量估计,重点是用油田、测井和岩心数据来确定一次和二次开采之后残余油的数量和位置。在评价剩余油之后,对开采它的方法进行分类。它们包括三次呆油、加密井、水平井、成熟油田的最佳注水开发设计、最佳井位和其他油藏管理做法。我们将介绍大公司拥有的大油田和独立公司拥有的小油田的现场应用实例。 特别注意到三次采油。我们提供了对三次采油技术(涉及其理论、实践和经济方面)的广泛研究和评论分析。重点是将其应用于成熟油田开发来提高效力(提高采收率)和效率(成本和开采时间)。包括旨在开发成熟油田的各种三次采油技术的实验室和现场规模应用,即气体(双驱替、水-气交替注入和混相-非混相HC、CO2、和N2)、化学剂(稀释表面活性剂、聚合物和胶束注入)和热(空气和蒸汽)注入。我们选择了大型/巨型油田、开采几十年的油田和中-小型油田的特例。我们将论述大公司、独立公司和国家石油公司油藏管理策略的差别。 展开更多
关键词 油田开发 成熟油田 三次采油技术 油藏工程 油藏管理 二次开采 现场应用 国家石油公司
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用试井分析来评价渗透率分布
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作者 余功铭 T.babadagli 《石油勘探开发情报》 2002年第2期71-73,共3页
关键词 试井 评价 渗透率分布 储层特性曲线
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Performance comparison of novel chemical agents in improving oil recovery from tight sands through spontaneous imbibition 被引量:5
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作者 Hai Huang Tayfun babadagli +1 位作者 Xin Chen Huazhou Andy Li 《Petroleum Science》 SCIE CAS CSCD 2020年第2期409-418,共10页
Tight sands are abundant in nanopores leading to a high capillary pressure and normally a low fluid injectivity.As such,spontaneous imbibition might be an effective mechanism for improving oil recovery from tight sand... Tight sands are abundant in nanopores leading to a high capillary pressure and normally a low fluid injectivity.As such,spontaneous imbibition might be an effective mechanism for improving oil recovery from tight sands after fracturing.The chemical agents added to the injected water can alter the interfacial properties,which could help further enhance the oil recovery by spontaneous imbibition.This study explores the possibility of using novel chemicals to enhance oil recovery from tight sands via spontaneous imbibition.We experimentally examine the effects of more than ten different chemical agents on spontaneous imbibition,including a cationic surfactant(C12 TAB),two anionic surfactants(0242 and 0342),an ionic liquid(BMMIM BF4),a high pH solution(NaBO2),and a series of house-made deep eutectic solvents(DES3-7,9,11,and 14).The interfacial tensions(IFT)between oil phase and some chemical solutions are also determined.Experimental results indicate that both the ionic liquid and cationic surfactant used in this study are detrimental to spontaneous imbibition and decrease the oil recovery from tight sands,even though cationic surfactant significantly decreases the oil-water IFT while ionic liquid does not.The high pH NaBO2 solution does not demonstrate significant effect on oil recovery improvement and IFT reduction.The anionic surfactants(O242 and O342)are effective in enhancing oil recovery from tight sands through oil-water IFT reduction and emulsification effects.The DESs drive the rock surface to be more water-wet,and a specific formulation(DES9)leads to much improvement on oil recovery under counter-current imbibition condition.This preliminary study would provide some knowledge about how to optimize the selection of chemicals for improving oil recovery from tight reservoirs. 展开更多
关键词 SPONTANEOUS IMBIBITION NOVEL chemical agent Water FLOODING TIGHT SANDS
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