钻井液与完井液2018，Vol.35Issue(2)：44-48,5.DOI:10.3969/j.issn.1001-5620.2018.02.007
高性能水基钻井液在莺歌海盆地高温高压井的应用
The Development and Application of High Performance Water Base Muds for HTHP Wells in Yinggehai Basin
林四元 1李中 1黄熠 1罗鸣 1郭伟2
作者信息
- 1. 中海石油(中国)有限公司湛江分公司,广东湛江 524057
- 2. 中海油能源发展股份有限公司工程技术湛江分公司,广东湛江 524057
- 折叠
摘要
Abstract
High temperature high pressure deep wells drilled in Yinggehai penetrated formations with narrow density windows. Conventional polymer sulfonate drilling fluids become highly viscous and difficult to flow in complex geological environment, and false thick mud cakes are generated. These generally result in resistance to drill pipe tripping, pipe sticking and lost circulation. A high performance water base drilling fluid has been formulated in laboratory with new high temperature polymers (Calovis HT and POROSEAL) replacing conventional polymers (PAC-LV, EMI1045 etc.). Laboratory evaluation shows that the high performance water base drilling fluid with density between 2.30 g/cm3-2.40 g/cm3 maintained its thermal stability for a long time at 200 ℃-220 ℃, was resistant to the contamination caused by 50 g/L drilled cuttings, 50 mL/L formation water and 5 g/L CO2, and performed well in reservoir protection, the return permeability reaches 84.6％. This high performance drilling fluid has been used on a well in Yinggehai with formation pressure coefficient of 2.20-2.40 and formation temperature between 190 ℃ and 200 ℃, which conventional polymer sulfonate drilling fluid has failed the drilling operation previously. This proved that the high performance water base drilling fluid had good high temperature stability and superior rheology. The successful application of the high performance drilling fluid has provided an reference for selecting drilling fluids for HTHP complex well drilling.关键词
莺歌海盆地/高温高压/高性能水基钻井液/高温热稳定性/流变性Key words
Yinggehai Basin/High temperature high pressure/High performance water base drilling fluid/High temperature stability/Rheology分类
能源科技引用本文复制引用
林四元,李中,黄熠,罗鸣,郭伟..高性能水基钻井液在莺歌海盆地高温高压井的应用[J].钻井液与完井液,2018,35(2):44-48,5.
