停泵压降法评价水平井暂堵压裂效果  

Evaluate the Temporary Plugging Effectivity for Fractured Horizontal Wells Through Pump-off Pressure Drop Analysis Method

作　　者：徐鹏 项远铠 刘蕊宁 吕明 陈神根 XU Peng;XIANG Yuankai;LIU Ruining;LU Ming;CHEN Shengen(Research Institute of Engineering Technology,PetroChina Xinjiang Oilfield Company,Karamay 834000,Xinjiang,China)

机构地区：[1]中国石油新疆油田分公司工程技术研究院,新疆克拉玛依834000

出　　处：《新疆石油天然气》2022年第4期79-83,共5页Xinjiang Oil & Gas

基　　金：中国石油新疆油田分公司科研项目“2021年原油和天然气产能建设区块钻、采、地面工程方案研究”(210099992001022005001)。

摘　　要：吉木萨尔页岩油体积压裂水平井主要采用密切割+大段多簇的方法进行储层改造,为进一步提高改造效果,现场通过暂堵方法促进裂缝均衡起裂。为评价暂堵有效性,基于停泵压降数据,利用压裂软件解释暂堵前后储层及工程参数,通过试井软件进行对比验证。两类软件解释结果相近,结论可靠有效,且方法简单、易操作、节约成本,为现场暂堵试验提供了有力指导。研究结果表明,暂堵后裂缝闭合时间延长,压裂液效率提高,改造区渗透率减小,暂堵剂有效封堵物性较好区域,暂堵有效。In Jimsar,the method of dense cutting+large section and multi-cluster is applied to most of the horizontal shale oil wells that have been subjected to volume fracturing for stimulation.In order to further improve the stimulation effectivity,the method of temporary plugging is used in field to promote even fracture initiation.To evaluate the effectivity of temporary plugging,this paper interprets the reservoir and engineering parameters before and after temporary plugging based on pump-off pressure drop data using fracturing software.According to the comparison and verification made by well testing software,the interpretation results are similar,and the conclusions are reliable and effective.This method is simple,easy to operate,and cost-effective,and provides powerful guidance for field test of temporary plugging.The study results show that after temporary plugging,the closure time of fractures is prolonged,the efficiency of fracturing fluid is improved,and the treatment zone permeability is reduced,which prove that the temporary plugging agent is effective in satisfactorily plugging areas with good physical properties.

关 键 词：停泵压降分析 页岩油 体积压裂水平井 暂堵效果 压裂软件 试井软件 

分 类 号：TE357[石油与天然气工程—油气田开发工程]