Taking the reservoir rocks of sandstone gas reservoirs in China as the research object， combined with high pressure mercury injection and outcrop reconnaissance and gas field data analysis， taking pore throat radius， core permeability， well test permeability and logging permeability as indexes， this paper established the microscopic and macroscopic heterogeneity characterization methods of sandstone gas reservoir， and studied the heterogeneity characteristics of core micro pore throat， outcrop profile， block and gas field. The results show that the microscopic pore throat structure of sandstone gas reservoir is extremely complex， and the flow channel is composed of a large number of pores， fractures and throats of different sizes， forming a complex flow network which shows strong heterogeneity both microscopically and macroscopically. Combined with reservoir heterogeneity， the physical simulation model and method of heterogeneous full-diameter long core are established， and the production effects of well distribution in high permeability area and dense area are compared and studied. Under the condition of 800 mL/min rationing production， the stable production period of well distribution in high permeability area is 60% longer than that in tight area， and the production decreases rapidly after the end of stable production period， and the low production period is short； the formation pressure of well distribution in high permeability area decreases faster than that in tight area， indicating that reserves can be used more quickly； the recovery percent in high permeability area rises faster than that in tight area， and the recovery percent at the end of stable production period is 51.2% higher while the recovery is 14.6% higher. The research results are of guiding significance for the scientific development and enhanced gas recovery of similar gas reservoirs.
Keywords：Sandstone gas reservoir
;
Reservoir heterogeneity
;
Characterization method
;
Physical simulation
;
Enhanced gas reservoir recovery
HU Yong, JIA Yuze, HE Dongbo, WANG Jiping, LI Zhongcheng, ZHOU Mengfei, WEI Keying, JIANG Liangji, XU Xuan, JIAO Chunyan, GUO Changmin. Characterization method of gas reservoir heterogeneity and physical simulation experiment of production. Natural Gas Geoscience[J], 2022, 33(2): 297-302 doi:10.11764/j.issn.1672-1926.2021.08.019
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