安探1X高温深探井小间隙固井技术  

Cementing High Temperature Deep Well Antan-1X with Narrow Annular Spaces

作　　者：刘子帅 李拥军[2] 唐守勇 王东明[2] 蒋世伟 周崇峰 LIU Zishuai;LI Yongjun;TANG Shouyong;WANG Dongming;JIANG Shiwei;ZHOU Chongfeng(CNPC Drilling Research Institute, Beijing 102206;Exploration Division of PetroChina Huabei Oilfield Company Renqiu, Hebei 062550;PetroChina Zhejiang Oilfield Company, Hangzhou, Zhejiang 310023;The First Cementing Branch of CNPC Bohai Drilling Engineering Company Limited, Renqiu, Hebei 062550)

机构地区：[1]中国石油集团钻井工程技术研究院,北京102206 [2]华北油田公司勘探部,河北任丘062550 [3]中国石油天然气股份有限公司浙江油田分公司,杭州310023 [4]中石油渤海钻探工程有限公司第一固井公司,河北任丘062550

出　　处：《钻井液与完井液》2017年第4期90-95,共6页Drilling Fluid & Completion Fluid

基　　金：华北油田分公司项目"复杂探井固井技术研究与应用"(HBYT-2015-JS-402);国家重大专项课题课题四"复杂地质条件下深井钻井液与高温高压固井技术研究"(2011ZX05021004);国家重点研发项目"固井工程用高耐蚀高韧性水泥基关键材料与技术"(2016YFB0303602)

摘　　要：廊固凹陷是华北冀中坳陷3大富油凹陷之一,为华北油田主要产油区,其油层埋藏深,温度较高,井身结构复杂。安探1X井是部署在华北冀中坳陷廊固凹陷的1口风险探井,四开Ф127mm尾管下深5494m,地层温度高达177℃,气层活跃,压稳技术难度大,同时环空间隙小,水泥环薄,对水泥浆高温稳定性、防气窜能力以及对水泥石抗压强度衰退问题提出挑战。针对安探1X井固井难点,筛选出抗高温防窜水泥浆体系,其具有良好的沉降稳定性和游离液稳定性,稠化时间可调,防窜性能强,同时具有180℃高温强度不衰退等特点;通过优选高温悬浮稳定剂,形成抗温180℃冲洗隔离液体系,180℃沉降稳定性小于0.03 g/cm^3。在安探1X井Ф127 mm尾管固井中成功应用,水泥浆固井质量良好,为后期华北冀中坳陷的勘探开发打下了良好的基础。The Langgu sag,one of the three sags rich in oil in the Jizhong Depression,north China,is the main oil producing area of Huabei Oilfield.The reservoirs are deeply buried and the formation temperatures are high.The well Antan-1x is an exploratory well drilled in this area.This well had complex well profile,and theφ127mm liner(in4th interval)was run to5,494m,at which the formation temperature is177℃.Gas zones at the completion depth are very active and are difficult to control with high density drilling fluids.Narrow annular spaces and hence thin cement sheaths impose challenges to the high temperature stability and anti-channeling ability of cement slurry,and the compressive strength of set cement.A high temperature anti-channeling cement slurry was formulated for use in the well Antan-1x.This cement slurry has good anti-settling performance and ability in minimizing the amount of free water.Its thickening time is adjustable.The compressive strength of the set cement under180℃does not retrograde.A flushing spacer was formulated with high temperature suspension stabilizer,and the settling rate of the spacer under180℃was less than0.03g/cm3.In cementing theφ127mm liner string of the well Antan-1x,high quality cementing job was done with the high temperature cement slurry and the spacer,laying a good foundation for the later exploration and development of the Jizhong depression in north China.

关 键 词：深井 高温 小间隙固井 防窜 抗高温防窜水泥浆 抗污染冲洗隔离液 廊固凹陷 

分 类 号：TE257.6[石油与天然气工程—油气井工程]