摘要
在深水油气井、注蒸汽井、地热井以及永冻层油气井开采过程中大量热量损失会带来严重后果。介绍了国外水基隔热封隔液的研究和应用现状,包括剪切稀释体系、延迟交联体系及自交联体系。3种体系中,多元醇(聚合醇)和可溶性盐具有降低导热系数、加重、提高体系热稳定性等多重作用。剪切稀释体系中,高吸水树脂固化体系中的水和醇可进一步减小自然对流传热损失;延迟交联体系中,缓凝剂延缓增黏剂的交联方便现场泵送封隔液入井;自交联体系中,2种增黏剂在环空一定温度下发生自交联,体系黏度剧增从而进一步削弱自然对流传热。最后指出了研发水基隔热封隔液的必要性,并建议研究含高吸水树脂的剪切稀释体系和含缓凝剂的交联体系。
Huge heat loss in producing deep water oil and gas well, steam injection well, geothermal well and wells drilled in permafrost bring a serious consequence to the development of an oilfield. This paper introduces the study and application of water base heat insulating packer fluid, including shear-thing fluid, delayed cross-linking fluid and self-crosslinking fluid. Polyhydric alcohols and soluble inorganic salts can reduce the coefficient of thermal conductivity, increase the density and improve the thermal stability of these three packer fluids. Water and alcohol used in super absorbent resin solidifying packer fluid can further reduce heat loss by free convection. Retarders used in delayed crosslinking packer fluid can delay the crosslinking of viscosifiers, making it easy for the packer fluid to be pumped down the hole. Self-crosslinking of two viscosifiers takes place at a temperature in the annular space, severely increasing the viscosity of the packer fluid and further weakening free convection. In the conclusion, the paper points out the importance of developing water base heat-insulating packer fluid, and suggests that attention should be paid to the study of shearthinning fluid containing super absorbent resin and crosslinking fluid containing retarders.
出处
《钻井液与完井液》
CAS
北大核心
2014年第3期83-88,102,共6页
Drilling Fluid & Completion Fluid
基金
国家科技重大专项"大型油气田及煤层气开发"(2008ZX05017-003-04)的部分研究内容
关键词
无固相
水基隔热封隔液
深水
注蒸汽井
导热
自然对流传热
高吸水树脂
交联
缓凝剂
Solids-free
Water base heat-insulating packer fluid
Deep water
Steam injection well
Heat conduction
Heat conduction by free convection
Super absorbent resin
Cross-linking
Retarder
