摘要
徐闻X3井是中国石化的一口重点探井,设计井深5 658 m,设计最大井斜角为34.67°,预计井下温度高达184℃。该地区涠洲组地层的泥岩井段易缩径和垮塌,流沙港组的硬脆性黑色泥岩易垮塌。针对井深、井下温度高、地层不稳定、大尺寸长裸眼井段井眼净化困难等多项钻井液技术难点开展了抗高温钻井液室内研究,利用正交试验方法和滚动老化试验对多种抗高温处理剂进行优选,对优选出的钻井液处理剂进行配伍试验,优化出了抗高温钻井液配方。在180℃温度下,对该抗高温钻井液的高温稳定性能及二开转三开的钻井液的配伍性能进行了评价,结果表明,该钻井液高温性能稳定,二开转三开钻井液性能稳定,且工艺简单,能够满足徐闻X3井钻井施工的要求。
Well Xuwen X3 is a key exploration well with a design depth of 5685re,the bottomhole temperature of 184℃, and the maximum deviation angle up to 34.67°. Offset wells indicated that mudstone section in Weizhou formation caused wellbore shrinkage and collapse, and brittle black mudstone in Liushagang formation was prone to collapse. In order to solve these problems such as deep well,high bottomhole temperature,unstable formation, and long open hole cleaning, the laboratory study on high temperature drilling fluid system was conducted. The orthogonal analysis method was used to study high temperature treatment agent. The rolling aging test method was used to optimize the additives. Compatibility testing was conducted on the optimized drilling fluid and the drilling fluid system was obtained. After rolling aging test under 180 ℃ ,the drilling fluid high temperature stability and the drilling fluid compatibility from sec- ond spudding to third spudding was studied. The results show that this fluid is stable under high temperature. The drilling fluid performance is stable from second spudding to third spudding. The drilling fluid can meet the requirement of drilling operation in Well Xuwen X3.
出处
《石油钻探技术》
CAS
北大核心
2011年第1期66-72,共7页
Petroleum Drilling Techniques
关键词
井壁稳定
润滑
防卡
井眼净化
高温钻井液
徐闻X3井
hole stability
lubrication
sticking prevention
borehole cleaning
high temperature drilling fluid
Well Xuwen X3
