石油钻采工艺Issue(2)：60-63,67,5.DOI:10.13639/j.odpt.2014.02.015
苏丹六区KCl/硅酸盐钻井液体系的研究与应用
Research and application of KCL/silicate drilling lfuid in block 6 of Sudan
陈博 1赵后春 1徐心彤2
作者信息
- 1. 中国石油集团长城钻探工程公司钻井液公司，北京 100101
- 2. 北京化工大学，北京 100029
- 折叠
摘要
Abstract
In consideration of saving costs in block 6 of Sudan, the operating company changed the structure of some wells to‘two-section’ instead of‘three-section’. Thus formation with different pressure factors and characteristics is in the same bore hole which would cause complex problems in the hole such as lost circulation and borehole collapse and under which the original drilling lfuid technology could not meet the demand for drilling. Thus, the original drilling lfuid technology is improved according to the formation characteristics. The practical KCL/silicate drilling lfuid system is developed based on a lot of experiments in lab and on site. The new drilling lfuid can increase sustainable pressure of upper formation to 1.25 g/cm3 and can drill safely with a narrow safety density window. The effective control of solid concentration of drilling lfuid can overcome the dififculties in control the rheological property and realize the stable conversion of drilling lfuid system in drill process. The new KCL/Silicate drilling lfuid solves the potential risk of caving and lost circulation problems in long bore hole with different formation properties, pressures after the wellbore structure changes, reducing, system conversation time and the drainage of waste drilling lfuid signiifcantly, propenties, shortentingthe drilling period and cuuting costs of drilling lfuid materials.关键词
KCl/硅酸盐钻井液/体系转化/井壁稳定/流变性/苏丹六区Key words
KCl/silicate drilling lfuid/mud system transfer/hole stabilization/rheological property/block 6 of Sudan分类
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陈博,赵后春,徐心彤..苏丹六区KCl/硅酸盐钻井液体系的研究与应用[J].石油钻采工艺,2014,(2):60-63,67,5.
