Advances and prospects of high temperature-resistant fracturing fluid in ultra-deep reservoir
Ultra-deep oil and gas resources are the key breakthrough field for increasing reserves and production in future oil and gas exploration and development in China.Fracturing is an important way to complete the efficient development of ultra-deep oil and gas.However,ultra-deep fracturing faces harsh conditions,which poses new challenges to the fracturing working fluid.The research progress of ultra-deep high temperature resistant fracturing fluid was reviewed from three aspects:thickening agent,crosslinking agent and delayed crosslinking technology.The development history of thickening agents and cross-linking agents commonly used at home and abroad to improve the temperature resistance of fracturing fluids was summarized,and the temperature resistance limit of existing deep/ultra-deep fracturing fluids was clarified.The delayed crosslinking technology relying on environmental response had the most potential for application.At present,there were still problems with high concentrations of additives,complex molecular structures and high wellbore friction in temperature-resistant fracturing fluids.Developing high temperature-resistant delayed crosslinking fracturing fluids with low damage,high drag reduction and low cost would be the future development direction of ultra-deep fracturing fluids,which can provide a reference for further improving the efficient development of fracturing fluid technology for deep/ultra-deep oil and gas in China.
国家科技期刊平台
NSTL
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