苏里格气田强非均质性致密砂岩储层开发井网优化  

Well pattern optimization for the Sulige gas field with low permeability and strong heterogeneity

作　　者：唐俊伟[1] 贾爱林[1] 蔡磊[1] 郭建林[1] 魏铁军[1] 

机构地区：[1]中国石油勘探开发研究院鄂尔多斯分院,北京100083

出　　处：《大庆石油学院学报》2007年第5期73-77,共5页Journal of Daqing Petroleum Institute

基　　金：中国石油天然气股份有限公司科技攻关项目(000210020086)

摘　　要：苏里格气田属辫状河沉积,具有特低渗、强非均质性特征,有效砂体多呈长条形、孤立状分布在致密砂岩或泥岩中,规模小且连续性、连通性差.研究结果表明:这类储层适合于采用1200m×600m的长方形密井网开发;井间加密布井具有建产期投入工作量小、资金周转快的特点,同时建产期的抽稀骨架井网有利于加深地质认识,提高钻井成功率;在开发井网内部进行局部加密可以进一步提高采收率.Sulige gas field is characterized by low gas richness, extraordinarily low permeability, and significant reservoir heterogeneity. Formation of the gas field was deposited in a braided-river environment. Most of its net effective sandbodies, featured by small size and poor continuousness and connectivity, are dispersively distributed in the tight sandstones and mudstones in shapes of isolated spots or narrow strips. In order to get an optimum development strategy for the gas field, numerical simulation of a trial block has been performed. Simulation results show that well pattern of 1200×600m is the best for the gas field. 'Sequential' development of infill has the merits of delaying investments by delaying of drilling wells & surface facilities and improved economics outcomes. Basic well pattern completed in period of initial capacity construction benefits for learning more geologic characteristics and increasing success ratio of development well. In later period of the development, blocks which still have production potential can be down spaced again to improve gas recovery.

关 键 词：苏里格气田 致密砂岩 强非均质性 地质建模 井网优化 布井方式 采收率 

分 类 号：TE324[石油与天然气工程—油气田开发工程]