Method for establishing burial-thermal evolution history map of shale gas reservoir

Abstract

The invention provides a method for establishing a burial-thermal evolution history map of a shale gas reservoir. The method comprises the steps of acquiring layering data of a current stratum and static temperature measurement data of the current stratum; establishing a stratum lithology model of an interval for research; acquiring various burial history parameters; calculating the paleo-thickness and the buried depth of each stratum in each period; determining the ground temperature gradient, the heat conductivity, the heat generation rate and the ground heat flow value characteristics of the current ground temperature field; analyzing a formation mechanism and an evolution rule of the paleo-geothermal field; determining the maximum paleo-ground temperature experienced by the stratum towhich the sample belongs in the geological evolution process by using vitrinite reflectivity data; moreover, determining the paleo-geothermal gradient at the moment jointly by utilizing the Ro data ofthe multiple samples at different depths; determining a paleo-temperature evolution process of the sample, restoring a paleo-geothermal gradient evolution history, and drawing a burial history map ofthe paleo-geothermal field of the research area; calculating hydrocarbon source rock maturity evolution history; establishing and drawing a burial-thermal evolution history map of a sedimentary basin. According to the invention, high thermal performance history precision can be obtained.

Description

technical field [0001] The invention belongs to the fields of restoration of thermal evolution history of oil-gas-bearing basins and geological accumulation of oil and gas, and specifically relates to a method for establishing a burial-thermal evolution history map of shale gas reservoirs. Background technique [0002] The analysis of the tectonic thermal evolution history of sedimentary basins is one of the frontier technologies and hotspots in the field of shale gas geology. Through the analysis of the burial-thermal evolution history map of the area where the shale gas reservoir is located, the burial and subsidence history of the formation, the uplift and denudation history of the formation, the paleogeothermal evolution history of the formation, and the paleogeotemperature and hydrocarbon source experienced by the source rock can be obtained. The maturity evolution history of rocks, the hydrocarbon generation history of source rocks and other information can be used to ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for establishing a burial-thermal evolution history map of shale gas reservoirs to solve the problem of low accuracy and reliability of the burial-thermal evolution history map, and to obtain High thermal history accuracy

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