呼探1井ϕ139.7 mm尾管精细动态控压固井技术  

Precise Dynamic Managed-Pressure Cementing Technologies forϕ139.7 mm Liner Cementing in Well Hutan-1

作　　者：王敬朋 张伟[2] 吴继伟[2] 魏瑞华[2] 马锦明 杨虎 WANG Jingpeng;ZHANG Wei;WU Jiwei;WEI Ruihua;MA Jinming;YANG Hu(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan,610500,China;PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang,834000,China;Sinopec Research Institute of Petroleum Engineering Co.Ltd.,Beijing,102206,China;School of Petroleum,China University of Petroleum-Beijing at Karamay,Karamay,Xinjiang,834000,China)

机构地区：[1]油气藏地质及开发工程国家重点实验室(西南石油大学),四川成都610500 [2]中国石油新疆油田分公司,新疆克拉玛依834000 [3]中石化石油工程技术研究院有限公司,北京102206 [4]中国石油大学(北京)克拉玛依校区石油学院,新疆克拉玛依834000

出　　处：《石油钻探技术》2022年第6期92-97,共6页Petroleum Drilling Techniques

基　　金：中国石油重大专项“准噶尔南缘和玛湖等重点地区优快钻完井技术集成与试验”(编号:202019F-33)部分研究内容。

摘　　要：呼探1井ϕ139.7 mm尾管固井时封固段长、井底温度高,导致存在漏失与溢流风险大、对水泥浆性能要求高及水泥浆稠化时间不易控制等技术难点。为解决上述技术难点,在该井ϕ139.7 mm尾管固井段进行了精细动态控压固井技术试验。通过优化水泥浆配方、精细设计浆柱和优化设计套管扶正器安放位置,制定确保井筒动态压力介于地层孔隙压力与漏失压力之间等的技术措施,利用精细控压钻井装备,实现了控压下尾管、注水泥和水泥浆候凝,最终实现了全过程精细动态控压固井,该井ϕ139.7 mm尾管固井质量合格。呼探1井ϕ139.7 mm尾管精细控压固井成功,表明精细控压固井能够提高超深井长封固段窄安全密度窗口地层的固井质量,可为准噶尔盆地南缘深层油气勘探提供技术保障。Due to long cementing intervals and high bottomhole temperature,theϕ139.7 mm liner cementing in Well Hutan-1 was exposed to various technical difficulties,such as high lost circulation and overflow risks,high requirements on the performance of the cement slurry,and difficult control of the thickening time of the cement slurry.Precise dynamic managed-pressure cementing technologies were tested in theϕ139.7 mm liner cementing section in this well to address the above technical difficulties.Specifically,the cement slurry formulation was improved,the slurry column was precisely designed,and the casing centralizer placement was optimized.Technical measures were developed to ensure that the dynamic wellbore pressure was between the formation pore pressure and the lost circulation pressure,and the precise managed-pressure drilling equipment was utilized.Managed-pressure liner running,cement slurry injection,and waiting-on-cement were thereby implemented.As a result,a“whole-process”precise dynamic managed-pressure cementing was ultimately achieved.Theϕ139.7 mm liner cementing in Well Hutan-1 was considered up to standard.The successful implementation of precise managed-pressure cementing during theϕ139.7 mm liner cementing in Well Hutan-1 indicates that precise managed-pressure cementing can effectively enhance the cementing quality of long cementing intervals of ultra-deep wells in formations with narrow safety pressure window and can provide technical assurances for the exploration of deep oil and gas at the southern margin of the Junggar Basin.

关 键 词：超深井 尾管固井 水泥浆 控压固井 呼探1井 准噶尔盆地 

分 类 号：TE256[石油与天然气工程—油气井工程]