深层致密砂岩气藏高异常破裂压力影响因素分析

《深层致密砂岩气藏高异常破裂压力影响因素分析》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、第31卷第5期石油钻采工艺V01．31No．52009年10月OILDRILLING&PR0DUCT10NTECHNOLOGY0ct．2009文章编号：1000—7393(2009)05—0060—05深层致密砂岩气藏高异常破裂压力影响因素分析谢润成韩振林周文张生军葛善良王辛(1．成都理工大学“油气藏地质及开发工程”国家重点实验室，四川成都610059；2．河南省地质矿产勘查局，河南南阳4730033．中国石化西南分公司J-程技术研究院，四川德阳618000)摘要：川西坳陷深层气藏具有超埋深、超高压、固闭形成历史复杂等特征，压裂施工难度大。现有压裂及测试

2、资料表明该套地层存在高异常破裂压力。通过对可能引起致密砂岩储层高异常破裂压力的影响因素研究后发现，导致高破裂压力的因素主要有地质因素和工程因素，如储层致密、岩石中含有较多黏土矿物及层状、网状、斑状碳质层、地层超压、钻井诱导井眼附近应力场畸变、流体能量损失等研究结果可为今后在该地区开展储层压裂改造提供参考。关键词：川西地区；深层气藏；致密储层；压裂；高破裂压力；影响因素中图分类号：TE357．1文献标识码：AAnalysisonfactorsinducingabnormalhighfracturepressureofdeeptightsandstonega

3、sreservoirXIERuncheng，HANZhenlin，ZHOUWen，ZHANGShengjun，GEShanliang，WANGXin(1StateKeyLabofOil＆GasReservoirGeologyandExploitation，ChengduUniversityofTechnology，Chengdu610059，China；2GeologicalSurreyInstituteofMineralResourcesEaplorationandDevelopmentBureauofHe'nanProvince，Nanyang473

4、003，China；3．EngineeringTechnologyResearchInstitute，SouthwestBranchofSinopec，Deyang618000，China)Abstract：ThedeepgasreservoirofWesternSichuanDepressionfeaturesinsuperdepth，ultrahighpressure，andcomplicatedtrapformation，SOfracturinggetsdificult．Thereservoirmayhaveabnormalhighfracture

5、pressure．Thefactorsthatmayleadtotheabnormalhighfracturepressureoftightsandstonereservoirarestudiedinthispaper．Thetensilestrengthofrockincreasesduetothesupertightreservoir．Thehighlevelofclaymineralsoftherockandthepresenceofalargenumberoflaminated，reticulation，porphyriticrocksresul

6、tinthetheincreaseinthecarbonlayerofplasticandtheadditionalpressurecausedbyoverpressureformation．Alltheseabovearethegeo—logicalfactorsleadingtotheincreaseinformationfracturepressure．Engineeringfactorsaremainlythefollowing：theaberrationofstressfieldnearaholeinducedbydrillingmayresu

7、ltintheincreaseinrupturepressureofno—crackformation．Theformationfracturepressuremaybecausedbythefluidenergylossduringtheextensionofcracks，thefluidflowfriction，andthebendingfrictioncausedbybendingcracks．Theanalysisofthemainfactorsthatmayinducetheabnormalhighfracturepressureofthest

8、udiedareaisfavorableforcarryingoutreserv