致密砂岩气藏井网加密优化研究——以新场气田沙溪庙组气藏为例  

Optimization of well pattern infilling in tight sandstone gas reservoirs--by taking Shaximiao formation of Xinchang gas field as an example

作　　者：向刘洋 邹陈蓉 XIANG Liuyang;ZOU Chenrong(Exploration&Development Research Institute of Southwest Oil and Gas Company,SINOPEC,Chengdu,Sichuan 610041,China)

机构地区：[1]中国石化西南油气分公司勘探开发研究院,四川成都610041

出　　处：《石油地质与工程》2020年第3期61-66,共6页Petroleum Geology and Engineering

摘　　要：井网加密可以增加波及面积、提高储量动用程度、提高气井的采收率,是致密砂岩气藏开发的主要技术手段之一。新场气田沙溪庙组气藏为典型的致密砂岩气藏,通过对其地质特征和气井动态分析,综合工程工艺、经济评价和数值模拟等方法,开展了沙溪庙组气藏井网井距的加密优化,确定了研究区内的单层合理井距、气田的加密潜力,以及井网密度与经济效益的关系;结合沙溪庙组气藏纵向上多气层叠置,平面上单气层内部差异大的特点,提出了多层合采、“以优带差”的开发模式,实现了井控储量和采收率的最大化与经济效益的最优化相结合的井网加密方式。应用于CX633井组后,取得了较好的开发效果和经济效益,可为气藏的高效开发提供有力的技术支撑。Well pattern infilling is one of the main techniques in the development of tight sandstone gas reservoir,which can increase the sweep area,increase the production degree of reserves and enhance the recovery of gas wells.Shaximiao formation gas reservoir in Xinchang gas field is a typical tight sandstone gas reservoir.Through the analysis of its geological characteristics and gas well performance,comprehensive engineering technology,economic evaluation and numerical simulation,the encryption optimization of well pattern and well spacing in Shaximiao formation gas reservoir is carried out,and the reasonable well spacing of single layer,the encryption potential of gas field and the relationship between well pattern density and economic benefits are determined.Combined with the effect analysis of infilling wells,the development mode of multiple layers combined production by"better with worse"is put forward,which realizes the infilling mode of well pattern combining the maximization of well controlled reserves and recovery,and the optimization of economic benefits.After being applied to CX633 well group,a good development effect and economic benefit have been obtained,which can provide strong technical support for efficient development of gas reservoir.

关 键 词：沙溪庙组 致密砂岩气藏 井网加密 经济评价 经济极限 

分 类 号：TE377[石油与天然气工程—油气田开发工程]