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Based on the analysis of the characteristics of the low-permeability carbonate reservoir, this paper has carried out studies on the adaptability of geological conditions, the adaptability of rock mechanics conditions and the characteristics of horizontal stress of the reservoir, etc., and demonstrated the feasibility of the acid fracturing of the low-permeability carbonate reservoir with complex fractures. In view of the poor connectivity of low-permeability carbonate reservoirs and the unsatisfactory effect of conventional acid fracturing, a “large scale + high pump rate” process idea of complex fracture acid fracturing technology was formed through the simulation of process parameters and optimization of construction pipe string, so as to expand the reservoir stimulation volume and improve the communication scope.

Research of complex fracture acid fracturing technology in low permeability carbonate reservoir