摘要
Y151井区准备大规模开展水平井压裂施工,为准确评价Y151井区块水平井缝网压裂的适应性,有必要开展相关理论研究工作。通过点源函数建立的水平井、缝网压裂水平井地层压力分布函数,建立缝网压裂水平井有效压力驱替系统,确定压裂井-水平井联布和压裂井-缝网压裂水平井联布的最小压力梯度和井半距的函数关系,并根据工区启动压力梯度计算对应的技术极限技术井距。研究表明,Y151井区有效驱替系统最小压力梯度和井半距成三次多项式函数关系,根据工区启动压力梯度可计算不同井形联布的技术极限技术井距。
Y151well block is about to develop network fracturing for horizontal wells.It is important to carry out the relevant theoretical research work to accurately evaluate the applicability of this technology.Combined with geology and engineering,the feasibility of network fracturing for horizontal wells in Y151well area was demonstrated.The pressure distribution function of horizontal well and network fracturing horizontal well,the effective pressure displacement system of network fracturing horizontal well are established,and the relationship of the well spacing of network fracturing horizontal wells and the minimum pressure gradient is confirmed,which can calculate the corresponding limit well spacing according to the start-up pressure gradient.As is shown in study,network fracturing for horizontal well was suitable for Y151well area,and the study determined that the technical limit well spacing of network fracturing horizontal well was380m.
作者
曾嵘
张燃
邓元洲
ZENG Rong;ZHANG Ran;DENG Yuanzhou(Engineering Technology Research Institute, PetroChina Southwest Oil and Gas Field Co., Chengdu, Sichuan 610000, China;School of Energy Resource, Chengdu University of Technology, Chengdu, Sichuan 610059, China;HSE and Technical Supervision Institute of PetroChina Southwest Oil and Gas Field Co., Chengdu, Sichuan 610041, China;CCDC Petroleum Drilling & Production Technology Co. Ltd., Guanghan, Sichuan 618300, China)
出处
《钻采工艺》
CAS
北大核心
2018年第6期37-39,52,127,共5页
Drilling & Production Technology
基金
国家自然科学基金"页岩储层原始地应力仿真与局部人工扰动规律研究"(编号:51304032)资助
关键词
缝网压裂
水平井
地层压力分布
技术极限井距
network fracturing
horizontal well
formation pressure distribution
limit well spacing
