钻井液与完井液2025，Vol.42Issue(4)：478-485,8.DOI:10.12358/j.issn.1001-5620.2025.04.006
海上抗超高温低渗透储层钻开液技术
Drill-in Fluid Technology for Offshore Ultra-High Low-Permeability Reservoirs
摘要
Abstract
The second member of the Huangliu Formation in the Dongfang F gas field in the western South China Sea is a reservoir with ultra-high temperature,low porosity and low permeability,the temperature which is as high as 205℃.The solid-free drilling fluid used in the previous drilling operations degraded at elevated temperatures,negatively affected field operations and caused water lock damage to the reservoir.To deal with this problem,a temperature-sensitive polymer viscosifier,a viscosity increasing filter loss reducer,and an ultra-high temperature modified starch were selected to formulate a new high temperature solid-free drill-in fluid.The three additives work synergistically in the new drilling fluid to resist the action of ultra-high temperature.The drill-in fluid is stable at 210℃,the filtration rate is less than 10 mL at 150℃,the permeability recovery of the core contaminated with the drill-in fluid is greater than 90%,and the filter cake is easy to break and remove.Meanwhile the selected supporting ultra-high temperature water lock inhibitor does not foam,and can reduce the gas-liquid surface tension and oil-liquid interfacial tension of the drill-in fluid filtrate to 27.7 mN/m and 5.9 mN/m respectively.The new ultra-high temperature solid-free drill-in fluid has been successfully applied on the X2 adjustment well in the Dongfang F gas field.During the operation,the viscosity and gel strength of the system were stable,the filtration rate was small,the hole diameter was regular,the operation was smooth,and the test and production effect was good.The skin factor of this well was only 0.13.The new ultra-high temperature solid-free drill-in fluid is of great significance for reducing the drilling and development risks of such offshore reservoirs and for ensuring the production capacity.关键词
东方F气田/超高温/储层钻开液/低孔低渗/储层保护Key words
Dongfang F gas field/Ultra-high temperature/Drill-in fluid/Low porosity and low permeability/Reservoir protection分类
能源科技引用本文复制引用
刘智勤,崔应中,余意,张雨,黄登铸..海上抗超高温低渗透储层钻开液技术[J].钻井液与完井液,2025,42(4):478-485,8.基金项目
中海油重大科技项目"南海西部油田上产2000万方钻完井关键技术研究"部分研究成果(CNOOC-KJ135ZDXM38ZJ05ZJ). （CNOOC-KJ135ZDXM38ZJ05ZJ）
