Method for judging microcosmic occurrence pore structure of organic matter in shale oil reservoir

The invention belongs to the technical field of oil and gas development, and discloses a method for judging a microcosmic occurrence pore structure of organic matters in a shale oil reservoir. Different types of organic matters are removed by stages through extraction by a Soxhs extractor, thermal cracking by a rock pyrolysis instrument and soaking by an oxidizing agent, and after corresponding organic matters (shale oil, free-state solid cleaning, adsorbed-state asphalt and the like) are removed, experiments are performed by utilizing a mercury intrusion method, a nitrogen adsorption method and a nuclear magnetic resonance method; the pore space occupied by different organic matters in the shale reservoir and corresponding pore parameters are quantitatively obtained, and the pore space in the shale reservoir is subdivided, so that richer pore space parameters are obtained. And samples and instruments required by the method are easy to obtain, the efficiency is high, the investment of time and capital cost ca