塔里木DB区块砾石层特征及对优快钻井影响  

Characteristics of Gravel Layer in DB Block Tarim and It's Affection of Fasten Drilling

作　　者：王延民[1,2] 梁红军[2] 李皋[1] 秦丽平[2] 贾红军[1] 曾永清[2] 张志[2] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 [2]中国石油塔里木油田分公司,新疆库尔勒841000

出　　处：《新疆地质》2012年第1期113-115,共3页Xinjiang Geology

基　　金：国家高技术研究发展计划(863计划2006AA06A103)项目资助

摘　　要：塔里木DB区块浅层砾石研磨性强,钻井过程中井壁稳定性差、机械钻速低等问题较突出,严重影响深层油气勘探进展.本研究结合工程地质资料及室内实验,重点对该区岩石矿物成分随井深变化规律、胶结特征及水化过程研究,得出该区第四系到库车组上部层段砾石胶结强度低,且含大量水敏性粘土矿物.库车组下部、康村组和吉迪克组砾石胶结致密,成岩性好,不含膨胀性粘土矿物.研究成果可为今后该区砾石层段气体钻井等安全优快钻井技术提供理论依据.The existence of poorly interconnected thick hard gravel layer which in Tarim DB block often causes difficult drilling operations. In order to improve the drilling efficiency of gravel layer and shorten construction period, the paper studies the relationship of mineral composition and well depth, cementing characteristics and hydration process. The results show that the Quatenary and Kuche group gravel layers have low intensity and plenty of water-sensitive clay minerals, but Kangcun group and Jidike group gravel layers have well cemented condition and no swelling clay minerals.

关 键 词：塔里木油田 砾石层 井壁稳定 特征 

分 类 号：P634[天文地球—地质矿产勘探]