石油钻采工艺2016，Vol.38Issue(2)：138-143,155,7.DOI:10.13639/j.odpt.2016.02.002
车66区块钻井过程井底压力波动及渗流规律
Bottom-hole pressure fluctuation and seepage pattern during well drilling in Che-66 Block
李云 1贾江鸿2
作者信息
- 1. 中国石化胜利石油工程有限公司技术装备处
- 2. 中国石化胜利石油工程有限公司钻井工艺研究院
- 折叠
摘要
Abstract
Drilling operations in the Che-66 Block are susceptible to blocking, formation collapsing, lost circulation, blowout and other complexities. Based on fluid dynamics in annulus and with consideration to formation permeability features, magnitudes of swabbing pressure and surge pressure produced during tripping and drilling operations were analyzed, together with effects of drilling fluid viscosities, densities, well depths and ROPs. In accordance with linear seepage theory, models for unidirectional fluid spherical centripetal flow and plane radial flow were deployed to determine seepage patterns and lost circulation of drilling fluids during penetration of reservoir formations under negative pressure. Research results show that higher bottom-hole differential pressure and formation permeability may lead to higher speed in seepage of formation fluids and higher volume of drilling fluids lost. The conclusions highlighted fluctuation in bottom-hole pressure during drilling, together with seepage pattern and relevant influencing factors. The research results can provide necessary foundation for optimization of borehole structural design.关键词
钻井/井底压力/渗流规律/井身结构设计/车66区块Key words
drilling/bottom-hole pressure/seepage law/borehole structural design/Che-66 Block分类
能源科技引用本文复制引用
李云,贾江鸿..车66区块钻井过程井底压力波动及渗流规律[J].石油钻采工艺,2016,38(2):138-143,155,7.
