Evaluation method of shale micro-pore structure

The invention relates to a shale micro-pore structure evaluation method, and belongs to the field of unconventional oil and gas reservoir pore research. The evaluation method for the microcosmic pore structure of the mud shale comprises the following steps: carrying out an adsorption test on a mud shale sample with the particle size of 80-100 meshes, and then evaluating the microcosmic pore structure of the mud shale by utilizing an adsorption test result. According to the evaluation method for the microcosmic pore structure of the shale, the influence of the particle size of the shale sample on an adsorption test result is fully considered, when the 80-100-mesh shale sample is selected for the adsorption test, not only can part of pores of the sample be prevented from being completely exposed, but also the pore structure of the sample can be prevented from being damaged, and the evaluation accuracy is improved. And thus, the accuracy of evaluating the micro-pore structure of the shale is improved. 本发明涉及一种泥页岩