摘要
针对现有不稳定流分析方法的局限性,结合强非均质气藏型储气库注采运行特点,建立了考虑储气库多周期注采历史动态等复杂因素的动态不稳定流分析方法,并绘制了相关理论图版。提出了适合储气库井交变工况的“三点两段”式注采动态不稳定流分析新模式,“三点”指循环注采的3个时间点,即建库注气起始点、注采分析段起始点和结束点,“两段”指历史流动段和注采分析段。研究发现:储气库井注采过程中无因次拟压力和无因次拟压力积分曲线前期下掉;无因次拟压力积分导数曲线中间过渡区存在采气期曲线上凸、注气期曲线下凹的现象,不同流动历史下的曲线具有非典型性。新方法实现了储气库注采动态不稳定流分析,呼图壁储气库典型井的实际应用表明,新方法压力历史拟合精度高,解释参数关联性强,应用结果可靠。
A dynamic transient flow analysis method considering complex factors such as the cyclic injection and production history in a gas field storage facility was established in view of the limitations of the existing methods for transient flow analysis and the characteristics of the injection-production operation of strongly heterogeneous gas reservoirs,and the corresponding theoretical charts were drawn.In addition,an injection-production dynamic transient flow analysis model named"three points and two stages"suitable for an underground gas storage(UGS)well with alternate working conditions was proposed.The"three points"refer to three time points during cyclic injection and production,namely,the starting point of gas injection for UGS construction,the beginning and ending points of the injection-production analysis stage;and the"two stages"refer to historical flow stage and injection-production analysis stage.The study shows that the dimensionless pseudo-pressure and dimensionless pseudo-pressure integral curves of UGS well flex downward in the early stage of the injection and production process,and the dimensionless pseudo-pressure integral derivative curve is convex during the gas production period and concave during the gas injection period,and the curves under different flow histories have atypical features.The new method present in this paper can analyze transient flow of UGS accurately.The application of this method to typical wells in Hutubi gas storage shows that the new method can fit the pressure history accurately,and obtain reliable parameters and results.
作者
王皆明
李春
孙军昌
唐立根
钟荣
刘先山
郑少婧
WANG Jieming;LI Chun;SUN Junchang;TANG Ligen;ZHONG Rong;LIU Xianshan;ZHENG Shaojing(PetroChina Research Institute of Petroleum Exploration&Development,Langfang 065007,China;Key Laboratory of Oil and Gas Underground Storage Project of China National Petroleum Corporation,Langfang 065007,China)
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2022年第1期156-165,共10页
Petroleum Exploration and Development
基金
中国石油天然气集团有限公司重点科技攻关项目“气藏型储气库提高运行压力关键技术研究与应用”(2019B-3204)
中国石油天然气股份有限公司重点科技攻关项目“气藏型储气库动态试井分析新技术研究”(kt2020-16-01)。
关键词
气藏型储气库
注采动态
交变工况
不稳定流分析
理论图版
gas field storage facility
injection and production performance
alternate working conditions
transient flow analysis
theoretical chart
