海上特高含水期油田精细油藏描述技术及应用——以陆丰油田海陆过渡相A油藏为例  

Fine reservoir description and its application in offshore ultra-high water-cut oilfields:Taking the marine-continent transitional facies A reservoir of Lufeng oilfield as an example

作　　者：朱义东 李威 王要森 文星 居字龙 周开金 ZHU Yidong;LI Wei;WANG Yaosen;WEN Xing;JU Zilong;ZHOU Kaijin(CNOOC China Limited,Shenzhen Branch,Shenzhen,Guangdong 518054,China;Hubei Geological Survey,Wuhan,Hubei 430034,China)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518054 [2]湖北省地质调查院,湖北武汉430034

出　　处：《中国海上油气》2020年第5期91-99,共9页China Offshore Oil and Gas

基　　金：中海石油(中国)有限公司深圳分公司科研项目“南海在生产油田挖潜技术研究(编号:YXKY-ZL-SZ-2016-04)”部分研究成果。

摘　　要：为满足强非均质储层高含水后期小尺度、高精度挖潜需求,以陆丰油田海陆过渡相A油藏为例,针对海上油田水平井、高速开发的特点,构建了多资料、多学科融合的一体化精细油藏描述流程,形成了3项关键技术:(1)基于沉积微相指导的层系细分、充分利用水平井沿程归位信息的精细构造描述技术,实现了3 m以内低幅微构造刻画;(2)基于井震相的储层分类及神经网络预测、充分利用测井和试井动静数据的储层精细描述技术,实现了3 m以下泥钙质夹层盲井符合率80%以上;(3)基于不同驱替倍数岩心水驱实验、结合不同时期测井数据的油藏参数时变精细模拟技术,模型中过路井饱和度更吻合实钻,生产动态拟合率达93%。依据油藏描述结果,部署了2口调整井,实钻构造误差约2 m,储层钻遇率100%,剩余油分布与模型预测基本一致。In order to enable the small-scale and high-precision tapping potential of high heterogeneous reservoir in its high water cut later development stage,by taking the marine-continent transitional facies A reservoir of Lufeng oilfield as an example,we have established an integrated fine reservoir description process that considers multi-data and multi-discipline according to the characteristics of horizontal wells and high-speed development in offshore oilfields,and further formed three key technologies:(1)The fine structure description technology based on the sedimentary microfacies-guided strata subdivision and fully making use of the homing information of horizontal wells has been developed to realize the characterization of low amplitude microstructure of less than 3 m;(2)A fine reservoir description technology that stems from the well-seismic facies reservoir classification and neural network prediction,and fully uses the dynamic/static logging and well test data has been formed to achieve a coincidence rate of more than 80%in blind wells with argillaceous/calcareous interlayers of below 3 m;(3)Based on the core water flooding experiment under different displacement times and the logging data of different periods,the fine simulation technology of time-varying reservoir parameters has been developed.The saturation of encountered well in the model is more consistent with that of the drilled well,and the fitting rate of production performance reaches 93%.Two adjustment wells were deployed according to the results of reservoir description,the error of drilled structure was about 2 m,the reservoir encountering rate was 100%,and the distribution of remaining oil was basically consistent with the model prediction.

关 键 词：特高含水期 精细油藏描述 水平井沿程归位 神经网络预测 油藏参数时变 

分 类 号：TE32.1[石油与天然气工程—油气田开发工程]