Abstract: A computer-implemented method for partition table data writing includes obtaining a first data row to be written into a first partition table and a current partitioning rule indicating at least that the first partition table includes a partitioning key that is a basis for dividing data rows to be written into logical partitions and a first quantity of partitions. A target logical partition corresponding to the first data row is determined. A target physical partition is determined, where the target physical partition has a globally unique partition identifier. The globally unique partition identifier of the target physical partition and an auto-increment identifier of the first data row to the first data row are added as a composite primary key value. The first data row with the composite primary key value is stored to the first partition table.

Abstract: A method for evaluating thickness and density of adsorbed methane in pores contributed by organic matter, clay and other minerals in a mud shale reservoir, including: crushing a sample and selecting three or more subsamples with different meshes to determine TOC, kerogen, whole rock analysis, low-temperature nitrogen adsorption-desorption and methane isotherm adsorption; calculating contents of organic matter in respective subsamples from TOC and kerogen contents; normalizing contents of organic matter, clay and other minerals; evaluating the volume of pores contributed by organic matter, clay and other minerals per unit mass according to contents thereof and low-temperature nitrogen adsorption-desorption; evaluating content of adsorbed methane in organic matter, clay and other minerals per unit mass according to contents thereof and methane isotherm adsorption; and establishing a model for calculating density and thickness of adsorbed methane.