Control of micropore structure of the tight volcanic rock reservoir to gas deliverability in yingtai gas field

Tight gas generally exists in the tight sandstone, conglomerate, low porosity carbonate rocks, logging response and interpretation methods in this kind of gas reservoir are different from conventional gas reservoir for low porosity and low permeability, so the logging evaluation is difficult. Therefore, this article will take the second group secondary volcanic clastic rock of Yingtai gas field for example, analyze the main impact factor of assessment to tight volcaniclastic rock reservoir recognition from the microscopic pore structure characterization Otherwise, quantitative evaluation of pore structure classification for tight gas reservoir was carried out by using capillary pressure data. The microscopic pore structure of tight gas reservoir evaluation technology which puts forward suggestions for optimizing test gas layer was finally formed through analysis of relationship between gas test effect and pore structure. This method has put into popularization and application in the Yingtai gas field tight volcanic clastic rock area and interpretation results validated by the test gas, and solved technical problems of logging evaluation for unconventional tight volcanic rock gas reservoir, meet the needs of the production operation.