东胜气田什股壕气区岩性—构造气藏高产配置模式及开发对策  

High-yield configuration modes and development countermeasures of lithological-structural gas reservoirs, Shiguhao gas province, Dongsheng gasfield

作　　者：郭辉[1] GUO Hui(Sinopec North China Company,Zhengzhou,Henan 450006,China)

机构地区：[1]中国石化华北油气分公司,河南郑州450006

出　　处：《天然气技术与经济》2022年第5期15-21,共7页Natural Gas Technology and Economy

基　　金：国家科技重大专项“低丰度致密低渗油气藏开发关键技术”(编号:2016ZX05048)。

摘　　要：东胜气田位于鄂尔多斯盆地北部,什股壕气区二叠系下石盒子组盒2+3段气藏为岩性—构造气藏,开发过程中气井产能差异大,且大部分气井产液量大,影响了气田的开发效果。为了明确岩性—构造气藏气井高产配置模式以及合理开发对策,以什股壕气区58口单井局部构造形态、储层砂体展布特征、构造与砂体配置关系为研究对象,分析了不同气藏配置模式气井的地质特征及生产特征,指出了两种气井高产配置模式。在“微幅构造解释、窄河道预测、气水定量刻画”气藏精细描述的基础上,结合两种高产气藏配置模式的开发对策,实现了岩性—构造气藏储量的有效动用。研究结果表明:(1)“背斜(构造圈闭)成藏、鼻隆(构造圈闭+岩性遮挡)成藏”是气井高产的两种气藏配置模式;(2)“微幅构造精细描述、窄河道精细预测、气水分布定量刻画”是气藏开发的基石,结合有利的气藏配置模式是岩性—构造气藏效益开发的关键。结论认为,什股壕气区的开发实践及研究成果,对于同类型气藏开发具有指导意义。In Shiguhao gas province, Dongsheng gasfield, northern Ordos Basin, the Permian Lower Shihezi 2+3Members belong to lithological-structural gas reservoirs. During their development, gas wells varied greatly in productivity and most of them featured large liquid production, which might affect a development result. To ascertain high-yield configuration modes in the lithological-structural gas reservoirs and make reasonable development countermeasures, both geological and production characteristics were analyzed for 58 wells in this province with various modes from aspects of structural forms, sandbody extension, and structure-sandbody configuration. Furthermore, two modes were pointed out. On top of that, linked to development countermeasures on these two modes,an effective production was realized for the lithological-structural gas reservoirs on the basis of fine characterization of "micro-amplitude structure interpretation, narrow channel prediction and quantitative depicting of both gas and water". Results show that(1) "anticline(structural trap) forming reservoirs and nose-like uplift(structural trap + lithological barrier) forming reservoirs" are two forming configuration modes for high-yield gas wells;(2) "micro-amplitude structure interpretation, narrow channel prediction and quantitative depicting of both gas and water" are the foundation of reservoir development, and a beneficial configuration mode is the key to the efficient development of lithological-structural gas reservoirs;and(3) practices in Shiguhao gas province are of guiding significance to the development in similar gas reservoirs.

关 键 词：鄂尔多斯盆地 东胜气田 岩性—构造气藏 高产配置模式 构造精细解释 窄河道预测 

分 类 号：P618.13[天文地球—矿床学]