超低渗油藏老井体积压裂技术研究与应用  

RESEARCH AND APPLICATION OF SRV FRACTURING TECHNOLOGY FOR OLD WELLS IN ULTRALOW PERMEABILITY RESERVOIR

作　　者：苏良银 常笃[1,2] 齐银 黄婷[1,2] 李向平[1,2] 达引朋 SU Liangyin;CHANG Du;QI Yin;HUANG Ting;LI Xiangping;DA Yinpeng(Oil&Gas Technology Research Institute Changqing Oilfield Company,Xi’an,Shanxi 710018,China;National Engineering Laboratory for Exploration and Development of Low-Permeability Oil&Gas Fields,Xi’an,Shanxi 710018,China)

机构地区：[1]中国石油长庆油田分公司油气工艺研究院 [2]低渗透油气田勘探开发国家工程实验室

出　　处：《钻采工艺》2020年第2期75-77,89,I0020,共5页Drilling & Production Technology

基　　金：国家科技重大专项项目课题“低渗-超低渗油藏有效开发关键技术”(编号:2017ZX05013)部分研究内容。

摘　　要：近年来,超低渗透油藏开发普遍面临储层致密和注水不见效导致的油井连片低产问题。文章在剖析储层地质特征和油藏开发现状的基础上,结合注水井网和剩余油分布特征,利用数值模拟和生产动态等方法进行了地应力变化研究和增产潜力分析,提出了油井以增加裂缝带宽为主要目标的体积压裂设计思路,形成了"全程多级暂堵+体积改造"相结合的重复压裂工艺。现场应用表明,增油量是常规重复压裂效果的2倍以上,且后续稳产效果明显,为超低渗透油藏提高单井产量提供了技术借鉴。The development of ultra-low permeability reservoirs is generally faced with the problem of low production of oil wells because of tight reservoir and ineffective water injection in recent years. Based on analyzing the geological conditions of reservoir and current status of exploitation,combined with the distribution of flooding pattern and remaining oil,the changes of stress and production potential were researched by using the numerical simulation method for putting forward a SRV fracturing concept of " fracture broadband addition". This concept formed a combination model of re-fracturing for long-path multiple diversion and volume transformation. The field test shows that the effect of increasing production is obvious,which provides a technical reference for the similar well in ultra-low permeability reservoir.

关 键 词：超低渗 体积压裂 数值模拟 地应力 暂堵转向 

分 类 号：TE357[石油与天然气工程—油气田开发工程]