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Current Status and Future Trend of an Integrated Technology of Precise Fracturing with Enhanced Oil Recovery for Tight Oil and Gas Reservoirs
ZHOU Fujian, LI Gensheng, LIU Hao, LIU Xiongfei, TIAN Shouceng, LIANG Tianbo
Abstract331)   HTML20)    PDF (16723KB)(363)      

Tight oil and gas reservoirs in China are highly heterogeneous, with thin and scattered sand bodies, which cannot be efficiently developed by conventional hydraulic fracturing technology. In this paper, current reservoir simulation technologies were reviewed. In addition, in order to solve challenges in developing tight oil and gas reservoirs in China, this paper summarized several key technologies suitable for efficiently developing continental shale oil and gas in China, including synchronous stimulation technology of scattered sand bodies based on the hydraulic jet and radial horizontal wells, precise fracturing technology based on extreme limited-entry design and temporary plugging and diversion, sand reinforcement technology of complex fracture network based on micro-proppants and variable viscous slickwater, and deep matrix modification technology based on CO2 pre-fracturing and nano-emulsions. Finally, an integrated technology of precise fracturing with enhanced oil recovery is proposed, and it is suitable for heterogeneous and scattered sand bodies and mixed wet and tight oil and gas reservoirs. Furthermore, the technology points out the direction for the economic and efficient development of tight oil and gas reservoirs in China.

2023, 2 (2): 75-88.   doi: 10.3981/j.issn.2097-0781.2023.02.006