水驱油田断层封闭性动态评价模型  

Dynamic evaluation model of fault sealing in water drive oilfield

作　　者：刘媛 赵帅 周文胜 任帅 包智魁 LIU Yuan;ZHAO Shuai;ZHOU Wensheng;REN Shuai;BAO Zhikui(State Key Laboratory of Offshore Oil Exploitation,Beijing 100027,China;CNOOC Beijing Research Center,Beijing 100027,China;School of Petroleum Engineering,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]海洋油气高效开发全国重点实验室,北京100027 [2]中海石油(中国)有限公司北京研究中心,北京100027 [3]东北石油大学石油工程学院,黑龙江大庆163318

出　　处：《断块油气田》2024年第5期877-884,共8页Fault-Block Oil & Gas Field

基　　金：海洋油气高效开发全国重点实验室开放基金项目“复杂断块油田基于断层稳定性的注采评价与调整技术研究”(CCL2021RCPS0506KQN)。

摘　　要：基于研究区实际地质、油藏开发资料,对断层封闭机理、影响断层封闭的主要因素进行分析,明确断层封闭机理为断层岩排驱压力封闭,不同情况下断层的封闭能力不同。影响断层封闭性主要因素有两盘岩性对接情况、断距、泥岩涂抹量、主应力大小、油水井配置及注采量。文中针对目前断层封闭性评价大都停留在静态层面,考虑油水井产量劈分、断层倾角等指标,以层为单位推导建立了一套针对已开发水驱油藏的断层封闭性动态评价数学模型,可根据油水井位置、注入采出量、井底流压实时定量对断层侧向封堵性、断层纵向稳定性进行评价。通过实例计算并与示踪剂测试结果对比,模型判定结果符合率达90.91%,表明模型可用于复杂断块油田断层动态封闭性计算。Based on the actual geology and reservoir development data of study area,the fault sealing mechanism and the main factors affecting fault sealing are analyzed.It is clarified that the fault sealing mechanism is the fault rock displacement pressure sealing,and the fault sealing ability is different under different conditions.The main factors affecting the fault sealing are the lithologic jointing condition,fault distance,mudstone spread amount,principal stress,oil and water well configuration and injection-production volume.In view of the fact that the current fault sealing evaluation mostly stays at the static level,this paper deduces and establishes a set of dynamic evaluation mathematical model of fault sealing for developed water drive oil reservoir based on layer,considering the oil and water well production split,fault dip angle and other indicators.The lateral sealing and longitudinal stability of faults can be evaluated in real time and quantitatively according to the location of oil and water wells,injection-production and bottom-hole flow pressure.Through the example calculation and comparison with the tracer test results,the coincidence rate of the model determination results is 90.91%,which indicates that the model can be used to calculate the dynamic fault sealing of complex fault-block oilfield.

关 键 词：油田开发 断层封闭性 水驱油田 复杂断块油田 侧向封堵性 纵向稳定性 

分 类 号：TE347[石油与天然气工程—油气田开发工程]