海上×油田聚驱砂岩含水饱和度计算方法  

Water Saturation Calculation Method of Polymer Flooding Sandstone in an Offshore Oilfield

作　　者：李鹏举[1,2] 韩文胜 李丽霞 陈冠中 徐茂河 付勇路 LI Pengju;HAN Wensheng;LI Lixia;CHEN Guanzhong;XU Maohe;FU Yonglu(Earth Science Institute,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;Accumulation and Development of Unconventional Oil and Gas,State Key Laboratory Cultivation Base Jointly-constructed by Heilongjiang Province and the Ministry of Science and Technology,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;CNOOC Research Institute CO.LTD.,Beijing 100028,China;The Fifth Production Plant of Daqing Oilfield Company LTD.,Daqing,Heilongjiang 163513,China)

机构地区：[1]东北石油大学地球科学学院,黑龙江大庆163318 [2]东北石油大学非常规油气成藏与开发省部共建国家重点实验室培育基地,黑龙江大庆163318 [3]中海油研究总院有限责任公司,北京100028 [4]大庆油田有限责任公司第五采油厂,黑龙江大庆163513

出　　处：《测井技术》2020年第5期468-471,共4页Well Logging Technology

基　　金：国家科技重大专项子课题“海上油田化学驱综合调整技术研究”(2016ZX05025-003-005)。

摘　　要：在高含水期开发阶段,对剩余油分布规律的研究具有重要意义。油层经过聚驱后,油层的物性、电性都会发生变化,导致测井曲线的响应特征发生变化,对油层的定性解释需要研究出测井曲线响应特征的变化规律。针对海上×油田咸水配注方式下的水淹层,分别研究了原始油层和水驱后、水驱后和聚驱后测井曲线的响应特征。注水开发井由于注入水与地层水的矿化度不同,地下的混合液电阻率很难求取。针对水淹层混合液电阻率求取这一难题,建立了联立混合液电阻率方程和阿尔奇电阻率方程同时求取含水饱和度和混合液电阻率的方法。实际应用效果较好,验证了该方法应用于×油田的有效性。It is of great significance to study the distribution law of remaining oil in the development stage of high water cut stage.After polymer flooding,the physical and electrical properties of the reservoir will change,resulting in changes in the response characteristics of logging curves.Qualitative interpretation of the reservoir needs to study the change rules of the response characteristics of logging curves.Aiming at the water-flooded layer in an offshore oilfield with saltwater injection pattern,the response characteristics of the original reservoir and the log curves after water flooding,water flooding and polymer flooding were studied by using the sub-well analysis technique.Because the salinity of injected water is different from that of formation water,it is difficult to obtain the resistivity of underground mixed liquid.Aiming at the difficult problem of calculating the resistivity of mixed liquid in water-flooded layer,mixed liquid resistivity model is core validation of the method of simultaneous calculating water saturation and resistivity of mixed liquid by simultaneous equation of resistivity of mixed liquid and equation of resistivity of Archie is established.This method has been applied to an offshore oilfield,and the application effect is good,which proves that this method is effective in this oilfield.

关 键 词：测井解释 聚合物驱 水淹层 测井响应 混合液电阻率 矿化度 剩余油分布 

分 类 号：P631.84[天文地球—地质矿产勘探]