石南31井区水平井钻井液工艺技术  

Drilling Fluid Technology for Horizontal Wells in Block Shinan 31

作　　者：邢鹏云[1] 张岐安 徐先国[1] 汤红琳[1] 李森[1] 

机构地区：[1]新疆石油管理局钻井公司准东泥浆公司

出　　处：《钻井液与完井液》2008年第1期39-42,共4页Drilling Fluid & Completion Fluid

摘　　要：石南31井区地层压力系数较低,钻井过程中易发生井漏、压差卡钻以及造斜段、水平段易形成岩屑床和钻具大面积贴靠井壁造成井下发生复杂事故。通过综合录井、特殊测井及投产井电性和生产等资料对比研究,确定石南31井区水平井钻井液密度控制为1.09～1.13g/cm3,动塑比为0.3～0.6Pa/mPa.s,直井段静切力为(1～3)/(5～7)Pa/Pa,斜井段和水平段为(2～4)/(9～11)Pa/Pa。针对该区地质特点,采用聚磺钻井液和配套工艺技术。现场应用表明,聚磺钻井液性能稳定,具有良好的流变性,润滑防卡性,携屑能力强,有效地防止了井壁坍塌和井漏,保护油气层效果好,满足了石南31井区大斜度水平井的钻井要求。Mud losses,differential pipe sticking and the formation of cutting beds in deviated section of a well were frequently encountered in block Shinan31 because of the low formation pressures.Based on the analyses of data obtained,it was decided that the density of the mud should be 1.09-1.13 g/cm3,YP/PV 0.3-0.6 Pa/mPa·s,Gel strengths in vertical section 1-3/5-7 Pa,and 2-4/9-11 Pa in deviated and horizontal sections.Using polymer-sulfonate drilling fluid,with the parameters controlled in the said ranges,the deviated wells in Block Shinan31 were successfully drilled.

关 键 词：聚磺钻井液 井眼稳定 防止地层损害 水平井钻井 石南31井区 

分 类 号：TE254.3[石油与天然气工程—油气井工程]