摘要
水平井段内多簇压裂是非常规油气效益开发的关键手段。以玛湖砾岩金龙2井区为例,由于储层非均质性、孔眼非均匀冲蚀及簇间流体竞争的影响,段内多个射孔簇难以同步起裂及均衡扩展。泵注球形或绳结式暂堵剂封堵过度进液孔眼,动态调整砂液分流,是促进段内均匀改造、充分挖掘储层产能的有效方法。准确、实时判别暂堵效果对及时调整暂堵方案、完善压裂工艺至关重要。综合考虑孔眼封堵、裂缝起裂和裂缝扩展3个过程,集成暂堵剂到位增压、同排量升压和曲线叠加3种方法,形成了段内多簇压裂暂堵效果综合判别方法,编制了配套软件,通过数据实时传输,实现了暂堵效果在线监测与判别。所建立的方法与管外光纤及鹰眼监测的结果吻合度大于85%,为暂堵工艺升级与推广提供了方法与理论支撑。
The in-stage multi-cluster fracturing technology in horizontal wells is a key method for the efficient development of unconventional oil and gas.Due to the influence of reservoir heterogeneity,non-uniform perforation erosion,and fluid competition,the instage multiple perforation clusters cannot initiate simultaneously and propagate evenly in Mahu conglomerate Jinlong 2 well block reservoirs.The perforations with the excessive fluid intake can be plugged by injecting the ball-shaped or knot-shaped diverters.The sand carrier fluids can be dynamically distributed.In this way,the fracturing stage can be evenly stimulated and the reservoir productivity can be fully excavated.It is of great value to judge the temporary plugging effect accurately and timely.In this way,the operation scheme can be adjusted and the stimulation effect can be improved.The perforation plugging,the fracture initiation,and the fracture propagation were completely considered by integrating the three methods of diverter in-place pressurization,same displacement pressure boost,and curve superposition.The comprehensive discrimination method of the in-stage multi-cluster temporary plugging effect was generated and the supporting software was compiled to realize online monitoring and discrimination.The method demonstrates more than 85%consistent with the monitoring results of optical fiber and hawk-eye,which provides method and theoretical support for the upgrade and popularization of the temporary plugging technology.
作者
谢勃勃
朱靖生
吴宝成
王明星
张建军
王博
XIE Bo-bo;ZHU Jing-sheng;WU Bao-cheng;WANG Ming-xing;ZHANG Jian-jun;WANG Bo(Xinjiang Oilfield Company,PetroChina,Karamay 834000,China;Unconventional Petroleum Research Institute,China University of Petroleum(Beijing),Beijing 102249,China)
出处
《科学技术与工程》
北大核心
2025年第17期7142-7148,共7页
Science Technology and Engineering
基金
国家自然科学基金(52374057)
新疆油田页岩/致密油气体积改造技术提升攻关与现场试验(2022ZS0607)。
关键词
段内多簇压裂
暂堵
判别方法
数据传输
multi-cluster fracturing
temporary plugging
discrimination method
data transmission
