影响别古庄油田京11断块开发效果的地质因素耦合作用研究

Study of geologic factors coupling on development performance of J11 Faulted Block Reservoir,Bieguzhuang oilfield

为遏制别古庄京11断块油田产量急速下降,改善油田开发效果,应用地质、测井和生产动态资料,通过对储层微构造、沉积微相、储层非均质性的精细刻画,对影响油田注水开发效果的地质因素及其耦合作用进行了深入研究。结果表明,微幅鼻状构造(微鼻)和三角断块高点连线构成的6个微构造凸起带是剩余油分布的最有利构造部位;砂滩和砂坪以较差的储层物性成为注水效率较差的储集相带;储层宏观非均质性直接决定了注入水推进方向和速度,形成差异性水驱,是影响油田注水开发最关键的地质因素。在上述3个地质因素的耦合作用下,处于微鼻和三角断块砂滩、砂坪沉积微相是剩余油最为富集的区域,也是油田部署加密井最有利的目标。

In order to control the production decline rate and improve the development performance,development geological factors of J11 Faul-ted Block Reservoir of Bieguzhuang oilfield,including microstructure,microfacies and reservoir heterogeneity,are studied comprehensively through geological,logging and dynamic data in this paper.Results show that six structural hulges which are composed of micro-nose and triangle fault-block are the favorable structure positions for remaining oil accumulation,while sand beach and sand flat are the most redundant sedimentary microfacies due to their relatively poor physical property.Macro reservoir heterogeneity directly determines the direction and speed of the injected water,and the differential flooding is the key development geological element affecting the effectiveness of water injection.As a result of the coupling effect of development characteristics above-mentioned,the most favorable area for remaining oil distribution is sand beach and sand flat situated at the micro-nose and triangle fault-block,which becomes the important drilling target of well infilling for Jingll Faulted Block Reservoir.