延安气田致密砂岩气藏开发井距优化研究
Research on well spacing optimization of tight sandstone gas reservoir in Yan'an Gas field
雷开宇 1高小平 1李云 2吴艳 1刘洋洋 1钟高润3
作者信息
- 1. 陕西延长石油集团有限责任公司 气田公司,陕西 延安 716000
- 2. 陕西延长石油集团有限责任公司,陕西 西安 710061
- 3. 延安大学 石油工程与环境工程学院,陕西 延安 716000
- 折叠
摘要
鄂尔多斯盆地延安气田上古气藏是典型的强非均质多层复杂叠置致密砂岩气藏,单井控制规模小、开发及动用难度大,为提高区块开发效果,在地质及气藏动态研究基础上,优选泄气半径法、干扰试井法、经济评价法对延安气田Y145井区开发井距进行优化调整.泄气半径法结果表明,井距在580～736 m较为合适;干扰试井法结果表明,山2层＞500 m较为适宜,山1及盒8层控制规模相对山2较为有限;经济评价法结果表明,Ⅰ+Ⅱ类储量区整体经济极限井距为617 m,合理井距为702 m.综合3种方法的研究结果,得出在目前经济技术条件下,采用600～700 m井距逐步完成加密调整可进一步提高区块储量动用程度和整体采收率.该研究可为同类气田井网加密调整提供一定的理论依据.
Abstract
The Upper ancient gas reservoir of Yan'an Gas field in Ordos Basin is a typical strong heterogeneous multi-layer complex superimposed tight sandstone gas reservoir,with small scale of single well control and difficult development and operation.In order to improve the block development effect,based on the study of geology and gas reservoir dynamics,the development well spacing of Y145 well area in Yan'an Gas field was optimized by the method of the deflating radius,interference well test and economic evaluation.The results of deflating radius method show that the well spacing between 580 and 736 m was more suitable.The results of interference well test-ing show that the control scale of Shan 2 layer>500 m was more suitable,and the control scale of Shan 1 and layer 8 was more limited than that of Shan 2.The results of economic evaluation method show that the economic limit well spacing of class Ⅰ + Ⅱ reserve was 617 m and the reasonable well spacing was 702 m.Based on the results of the three methods,it was concluded that under the current economic and technical conditions,using 600-700 m well spacing to gradually complete the adjustment of infill could further improve the degree of reserve utilization and the overall recovery.This study can provide a theoretical basis for the well pattern adjustment of similar gas fields.
关键词
延安气田/致密砂岩气藏/井距优化/采收率Key words
Yan'an Gas field/tight sandstone gas reservoir/Well spacing optimization/recovery efficiency引用本文复制引用
出版年
2024
NETL
NSTL
万方数据