摘要
体积压裂是致密油藏开发的重要手段之一,是随致密油气藏开发成长起来的一项新技术。文中为了提高已开发致密油藏的开发效果,将体积压裂理念引入已开发的老油田。针对长庆油田A3区块长7致密油藏,重点开展了应力模型计算、物理模拟实验、压力测试分析和井下微地震监测等研究,明确了老井体积压裂裂缝的延伸机理,确立了老井暂堵混合水压裂体积压裂技术,现场试验取得了较好的效果,为类似油井重复改造提供了新的技术手段。
With the tight oil reservoirs' development,the volumetric hydraulic fracturing is developed,it is an important way for development of tight oil reservoirs. This concept was introduced into the old oilfield in order to improve the development efficiency of the tight oil reservoirs developed already. Stress model calculation,physical simulation experiment,pressure test analysis as well as downhole microseismic monitoring were carried out for tight oil reservoir Chang7 at A3 block of Changqing Oilfield,the fracture propagation mechanism of old wells under volumetric hydraulic fracturing was understood,and a volumetric fracturing technology combining temporary plugging and mixed water fracturing was set up. Its field test was successful,providing a new means for refracturing of similar oil reservoirs.
出处
《钻采工艺》
北大核心
2017年第3期42-45,共4页
Drilling & Production Technology
基金
中石油科技项目"长庆油田5000万吨持续高效稳产关键技术研究与应用"(编号:2016E-0512)
关键词
致密油藏
重复压裂
老井混合水压裂
裂缝延伸
tight oil reservoir
re-fracturing
mixed water fracturing of developed well
fracture propagation
