致密砂岩气藏开发后期加密调整方案研究

The study on cryptographic adjustment scheme for tight sandstone gas reservoir at the later stage of development

苏14区块位于苏里格气田中区的中南部,区域构造属鄂尔多斯盆地陕北斜坡,目的层位处于二叠系盒8段及山1段,目前开发面临的问题是井网对储量控制程度不够,采收率偏低,亟需制定加密方案达成产建规模。需深入解剖有效砂体结构,确定剩余储量分布,分析井间连通性,建立区块三维精细气藏模型,形成致密砂岩气藏剩余储量评价技术;给出合理的砂体分类及对应合理井网井距,为后续加密井网研究奠定坚实基础,对该气藏的持续高效开发有重要意义。

Su 14 block is located in the middleand south of the central region o f sulige gas field, an d the area is constructed in thenorthern shaanxi slope of the ordos basin, with target layer in the He8 section and Shan1 section of Per mian . Atpresent, the proble mo f development is that the wellnit work is notenough to control reserves a n d the recovery is low . Therefore, it is urgent to develop anencryption scheme to reach the scale of production a n d construction. It is necessary to dissect the effective sand structure, determinethe remaining reserves distribution, analyze the connectivity betweevaluation technique of tight sandstone gas reservoirs. Reasonable sand classification a n d corresponding reasonablewell spacing are given, which lays a solid foundation for subsequent infill well pattern research, and is of great significance to the continuous and efficient development of the gas reservoir.