渤中M油田低渗储层裂缝特征及对开发的影响  

Fracture Properties of Low-Permeability Reservoir in the M Oilfield of Middle Bohai Sea and Its Impact on Development

作　　者：周军良 Zhou Junliang(CNOOC（China）Tianjin Branch,Tianjin 300459,Chin)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《特种油气藏》2018年第3期102-107,共6页Special Oil & Gas Reservoirs

基　　金：中国海洋石油总公司重大专项"渤海典型低孔低渗油藏勘探开发关键技术研究与实践"(CNOOC-KJ125ZDXM07LTDTJ02)

摘　　要：M油田为海上低渗油藏开发先导试验区,明确裂缝特征及其对开发的影响对提高试验区开发效果具有重要意义。运用岩心、薄片、成像测井、试产等资料,利用地质学、统计学方法得出储层裂缝对产能的影响。结果表明:渤中M油田低渗储层以高角度、低角度宏观构造裂缝和微观粒内缝为主;裂缝分布受构造、岩性、层厚、异常高压等因素控制;有效裂缝主要发育在背斜核部及断层上盘,是薄油层区域影响开发井产能的关键因素,决定了注采开发的效果。成果与目前生产动态吻合性好,有助于试验区低效井的治理及扩大注水规模,改善开发效果,也可为类似区块勘探开发提供借鉴。The M Oilfield is a pilot test area for offshore low-permeability reservoir development and it is of great significance to clarify the fracture properties and its impact on development.Core test,thin-section,imaging logging,pre-production test and other data are comprehensively used to study the effects of fracture on productivity through geology and statistical method.Result shows that the fractures in the low-permeability reservoir of M Oilfield mainly include high-angle,low-angle macroscopic structure fractures and microscopic intragranular fracture.The fracture distribution is greatly dependent on structure,lithology,stratum thickness,abnormal high-pressure,etc.Effective fracture mainly develops in the anticline core and the upper wall,which is the key factor affecting the well productivity in the thin-reservoir area and determines the development performance.The result shows a perfect agreement with the present production performance,which is favorable to inefficient well treatment and waterflooding expansion and development performance.This research could provide certain reference for the exploration and development of similar blocks.

关 键 词：低渗储层 裂缝 产能 影响因素 沙河街组 渤中M油田 

分 类 号：TE348[石油与天然气工程—油气田开发工程]