低压油气藏改建地下储气库储层保护

RESERVOIR PROTECTION REGARDING UNDERGROUND GAS STORAGE CONSTRUCTION BASED ON LOW-PRESSURE RESERVOIR

大张坨地下储气库是我国第一座天然气地下储气库,其实践经验对我国储气库建设具有重要意义,储层保护是利用油气藏建设天然气地下储气库的关键技术之一。在概述储层保护的基础上,介绍了储层保护的指导思想,从储层特性分析技术、保护储层的钻井配套技术、固井配套技术、测试求产配套技术4个方面,详细说明了大张坨地下储气库12口注采井建设全过程储层保护的19个技术要点。从钻井效果、固井效果、完钻电测、油气测试和注采能力5个方面对储层保护效果进行了系统评价,探索出一套低压油气藏建设地下储气库的储层保护综合配套技术体系。

The Dazhangtuo underground gas storage(UGS),the first UGS in China,will have valuable experiences with great significance for further more UGS construction in China.Reservoir protection is one of the key technologies for UGS construction based on oil and gas reservoirs.Accordingly,the instructive thought of reservoir protection was hereby introduced on the basis of overview on it.In addition,19 main technical points regarding the reservoir protection of the Dazhangtuo UGS construction based on 12 injection and production wells were spelt out in terms of analysis technique on reservoir characteristics,matching well drilling technique for the protected reservoir,matching well cementing technique and matching production testing technique.The reservoir protection effect was systematically appraised in terms of well drilling effect,well cementing effect,well completion electrical logging,oil and gas testing and gas supply capacity.An integrated support technical system regarding the reservoir protection of the UGS construction based on the low-pressure oil and gas reservoir was explored and acquired.