油藏注水困难原因分析及解决措施——以M油田复杂小断块砂岩油藏为例  

Research on Causes and Measures of Water Injection Difficulty——A Case Study of M Complex Small Block Reservoir

作　　者：周春香[1] ZHOU Chunxiang(Research Institute of Exploration and Development, Dagang Oilfield Company, Tianjin 300280, Chin)

机构地区：[1]中国石油大港油田勘探开发研究院,天津300280

出　　处：《重庆科技学院学报（自然科学版）》2017年第3期10-11,23,共3页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：中国石油天然气股份有限公司科技重大专项"复杂油气藏储层改造及增产关键技术研究"(2014E-06)

摘　　要：M油田复杂小断块砂岩油藏因开发效果不理想由天然能量开发转注水开发,转注井最大井口注入压力试注后仍注不进水,结合本区块储层物性、孔隙结构特征、黏土矿物含量、地层水矿化度和储层敏感性等导致注水困难的因素进行分析,认为该地区因储层黏土矿物中伊利石含量高导致喉道堵塞、地层水矿化度高,引起储层水敏性伤害,导致注水困难。提出采用土酸酸化处理,现场实施缓速土酸酸化后,消除了近井地带污染,注水井注入压力稳定,能完成配注要求。Because of weak development effect, M complex small block reservoir turns natural energy development to water injection development. The injection well still canrt perform well while injecting water with max wellhead injection pressure. In combination with factors of M reservoirrs physical property characteristics, pore structure, clay mineral content, salinity in formation and reservoir sensitivity, the paper considers that the high illite content is the main reason that causes throat blockage, formation water salinity and damage to water sensitivity, and finally leads to the difficulty of injecting water. This paper introduces the mud acid acidizing to solve the problem and re-ceives a favorite effect after the implementation of acid acidizing, which has other advantages, such as little near well zone pollution and stable injection pressure.

关 键 词：小断块 注水困难 土酸酸化 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]