摘要
塔里木盆地克依构造带的高压油气层、高压水层、盐水层、盐膏层、盐岩层以及复合盐层等给固井施工造成很大的困难。通过对高密度水泥浆、高密度隔离液及固井工艺的研究,选出了适合于含盐地层和不含盐地层的2个温度范围下的2种密度的水泥浆配方,高密度隔离液的加重方法,现场施工中的平衡压力固井工艺、配浆工艺、替浆工艺、候凝及井控措施、防卡措施。经现场20多口井应用表明,这2种高密度水泥浆体系及固井工艺技术解决了地层压力高、地层蠕变性强、封固井段温差大、地层岩性多变、同时封固油气水及盐膏层等问题。固井合格率为100％,其中在克拉苏区块的井,完井测试均获高产天然气,气水层封隔效果良好。
Troublesome zones such as high pressure water and saltwater layer, salt/cream bed, salt rock bedding and recombination rocks bedding in Kelasu-Yiqikelik structural belt in Tarim basin complicate cementing operation. Two compositions with different density for two temperature ranges are optimized to cement in salt and non-salt zones. High density spacer fluid weighting method and cementing technology including slurry preparing, displacing and waiting-on-ce-menting are also designed. Applications in more than 20 wells show success, and cementing qualification rates reach 100%. Especially in Kelasu block, isolations of gas-water formation are very good.
出处
《钻井液与完井液》
CAS
北大核心
2001年第3期18-20,共3页
Drilling Fluid & Completion Fluid
关键词
高密度水泥浆
隔离液
固井
固井质量
cement slurry
spacer fluid
high pressure
hydrocarbon zone
cementing
cementing technology
cementing quality
