Research on the Acid Fracturing Technology of Asphaltic Reservoir

For asphaltene - containing reservoir, the existence of asphalt leads to poor reservoir properties. According to field logging data, the asphalt content is inversely proportional to the production capacity of gas wells. The asphalt in the reservoir occupies a portion of the storage space of the reservoir and damages the pore structure. Which will not only reduces the porosity of the reservoir, but also significantly reduces the permeability of the reservoir, seriously affecting the physical properties of the reservoir and the production productivity of the well. In this paper, rock mechanics experiment and acid rock reaction dissolution rate, acid rock reaction rate and acid corrosion fracture conductivity experiment are carried out to clarify the acid rock reaction mechanism and related parameters of rock mechanics, obtain the acid corrosion fracture conductivity of the corresponding acid system, and provide key parameters for reservoir reconstruction design. And through laboratory experiments, the main acid system that can improve the conductivity of acid corrosion cracks was optimized, and the acid pressing process suitable for asphaltene reservoir is formed.