志丹油田正359井区延长组裂缝发育特征及其对注水开发的影响  

Characteristics and Water Injection Influence of Fracture of Yanchang Formation in Well Zheng-359 Area of Zhidan Oilfield

作　　者：邢强[1] 赵金 崔军平[2] 邓亚仁 王育强 邢隆 Xing Qiang;Zhao Jin;Cui Junping;Deng Yaren;Wang Yuqiang;Xing Long(Research Center of Exploration and Development, Yanchang Oilfield Co.,Ltd., Yan'an, Shaanxi 716000, China;Department of Geology, Northwest University, Xi'an, Shaanxi 710069, China)

机构地区：[1]延长油田股份有限公司勘探开发技术研究中心,陕西延安716000 [2]西北大学地质学系,陕西西安710069

出　　处：《非常规油气》2018年第6期70-75,共6页Unconventional Oil & Gas

摘　　要：本文主要研究志丹油田正359井区延长组裂缝发育特征并分析其对注水开发的影响。研究区岩心裂缝观察和人工裂缝监测结果分析表明,本区储层天然裂缝主裂缝方向在北东60°～80°之间,其中主力层长4+5储层人工裂缝方位主要为北东60°～80°,长6储层人工裂缝方位主要为北东40°左右。储层物性统计数据分析表明,微裂缝发育段所对应的孔隙度和渗透率值大多接近于或者大于其整个段的平均值,微裂缝对于储集层渗透率的提高有一定的改善作用。裂缝还对注水时机、注水方式以及井网部署具有很大的影响。在注水开发时一定要明确储层裂缝的分布规律,确定合理的注水开发参数,为该区油田注水开发方案部署提供指导。This paper studied on the fracture characteristics of Yanchang formation in well Zheng-359 area of Zhidan oilfield and analysis its influence on water injection.Analysis of core fracture observation and artificial fracture monitoring results showed that the main direction of natural fractures in this area is between NE60°~80°,and the main fracture azimuth of Chang-4+5 reservoir is NE 60°~80°,the azimuth of artificial fractures of Chang-6 reservoir is NE 40°.The analysis of physical statistics data showed that the values of porosity and permeability corresponding to the microcracks sections are mostly close or more than the average value of the whole segment.Therefore,the fractures have a certain positive effect on the permeability of the reservoir.The fractures also have great influence on the time of water injection,the way of water injection and the deployment of the well network.In water injection stage,it is necessary to make clear the distribution law of reservoir fractures,determine reasonable water injection parameters,and it is the guiding significance for the water injection development plan.

关 键 词：志丹油田 正359井区 延长组 裂缝特征 

分 类 号：TE122.2[石油与天然气工程—油气勘探]