含水层储气库注采效应的数值模拟  

Numerical simulation on gas injection-production effects of underground gas storage in aquifer

作　　者：赵斌[1,2] 李云鹏 田静[3] 王芝银[1,2] 

机构地区：[1]中国石油大学(北京)城市油气输配技术北京市重点实验室,北京102249 [2]中国石油大学(北京)机械与储运工程学院,北京102249 [3]中国石油勘探开发研究院廊坊分院,河北廊坊065000

出　　处：《油气储运》2012年第3期211-214,218,共5页Oil & Gas Storage and Transportation

摘　　要：以适于建造地下含水层储气库的某区地质资料为背景,采用气水二相渗流理论及数值模拟方法,对含水层储气库在注采气过程中储层平均压力和气泡体积的变化特征,以及储层构造特征、储层非均质性、注采方案对注气效果的影响等问题进行了研究。结果表明:在含水层储气库注采过程中存在压力相移现象;对于储层岩性特征为层状分布的含水层,应分层注采和分层管理;用泡沫作为气驱前缘可提高严重非均质性单一储层气体的波及效率;在注气过程中应注意利用重力排驱机理,采用合理的注气工作制度有利于储气量的提高;储集层在断层或断层与断层交接的部位是发生气体泄漏的危险区域。The study in this paper serves geological data of a region suiting to construct underground gas storage in aquifer as the background.Based on theory of seepage and numerical simulation,the changing characteristics of reservoir pressure and volume of natural gas bubble in reservoir,the affects of structural characteristics of reservoir and heterogeneity of reservoir on the gas injection results,and that of gas injectionproduction scheme on the results of gas injection-production are all investigated.The results show that the pressure hysteresis appeared in the process of gas injection-production.For the multi-layered aquifer,different gas storages should be built in each aquifer.Swept efficiency can be raised by using foam as gas displacement front in the process of gas injection.Expulsion mechanism of gravity should be used in the process of gas injection.The appropriate gas injection system can be used to improve the storage capacity.Geological fault or mutual contact zone of different faults is the dangerous zone of gas leakage.

关 键 词：含水层 地下储气库 注采效应 数值模拟 储层压力分布 

分 类 号：TE822[石油与天然气工程—油气储运工程]