储气库运行上限压力的确定方法及在板中北储气库的应用
Method of Determining the Upper Limit Pressure of Gas Storage Operation and Its Application in the Banzhongbei Gas Storage
闫萍 1靳叶军 2袁雪花 3宿鹤松 1常进宇 1曾静波 1张凤生 1蔡洪波4
作者信息
- 1. 中国石油集团测井有限公司,陕西 西安 710077
- 2. 东北石油大学,黑龙江 大庆 163318
- 3. 中国石油大港油田分公司,天津 300280
- 4. 中国石油辽河油田分公司,辽宁 盘锦 124010
- 折叠
摘要
大港油田板中北储气库位于板桥断层上升盘,为断层切割的半背斜构造,属于断块型储气库,断层和盖层的承压能力决定了储气库运行的上限压力.针对缺乏考虑力学完整性的储气库上限压力的研究现状,从地质力学角度出发,综合三维地震解释成果、XMAC测井地应力解释成果、岩石力学测试等资料,基于岩石脆性破裂理论对研究区盖层的水力封闭能力和断层的稳定性进行了评价,以确定考虑力学完整性的储气库安全运行上限压力.结果表明:板中北储气库盖层水力封闭能力上限为39.30 MPa,断层稳定性薄弱点位于2条断层的交叉位置,最小活化压力为30.57 MPa;综合盖层水力封闭能力上限和断层稳定性可知,板中北储气库运行上限压力为30.57 MPa,而设计运行上限压力为30.50 MPa,设计较为合理.研究成果对于储气库上限压力的设计具有指导意义.
Abstract
The Banzhongbei Gas Storage in the Dagang Oilfield is located on the upcast side of the Banqiao Fault,which is a fault block gas storages and a semi-anticlinal structure cut by faults.The loading capacity of faults and capping formation determines the high limit pressure for the gas storage operation.To address the lack of considera-tion of mechanical integrity in determining the upper limit pressure of gas storage operation,this study evaluates the hydraulic sealing ability of the cap rock and the stability of faults in the study area from the perspective of geome-chanics.This evaluation is based on comprehensive data including 3D seismic interpretation results,XMAC logging stress interpretation results,and rock mechanics tests.It utilizes the theory of rock brittle fracture to determine the upper limit pressure for the safe operation of gas storage considering mechanical integrity.The results show that the upper limit pressure of the hydraulic sealing capacity of the cap rock in the Banzhongbei Gas Storage is 39.30 MPa,and the weak point of fault stability is at the intersection of two faults with a minimum activation pressure of 30.57 MPa.By considering the upper limit of cap rock hydraulic sealing capacity and fault stability,the upper limit pres-sure for the operation of the Banzhongbei Gas Storage is determined to be 30.57 MPa,which is reasonably close to the design operating upper limit pressure of 30.50 MPa.The research findings have significant guiding for the de-sign of upper limit pressure for gas storage operation.
关键词
盖层/水力封闭能力/断层稳定性/上限压力/板中北储气库/大港油田Key words
cap rock/hydraulic sealing capacity/fault stability/high limit pressure/Banzhongbei Gas Storage/Dagang Oilfield引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据