Establishment of shale oil and gas yield evaluation model and parameter calibration method in closed system

Abstract

The invention relates to a shale oil and gas yield evaluation model building and parameter calibrating method applied under a closed system. The method includes the following steps of (1) building a shale oil yield evaluation model, (2) building a shale gas yield evaluation model, (3) measuring the shale oil yield and the shale gas yield through experiments, and (4) calibrating dynamic parameters in the shale oil yield evaluation model and the shale gas yield evaluation model. Due to the facts that shale oil generation and secondary cracking are considered at the same time and the shale oil yield evaluation model and the shale gas yield evaluation model are built in the closed system, considering from the degree of approximation between an experiment condition and a geological condition, the method effectively achieves description of the complex process that shale oil generation and secondary cracking exist at the same time under the closed system, and can describe shale oil and gas characteristics quantificationally and dynamically. The shale oil and gas dynamic parameters calibrated according to the method are combined with the thermal history of the burial history of an actual basin for geological extrapolation, and obtained shale oil and gas hydrocarbon generation history information is more accurate and reliable.

Description

technical field [0001] The invention relates to a method for evaluating unconventional shale oil and gas resources, in particular to a method for establishing a shale oil and gas yield evaluation model and parameter calibration method in a closed system. Background technique [0002] With the increasing demand for energy and the continuous consumption of conventional oil and gas resources due to economic and social development, the contradiction between supply and demand of oil and gas has become increasingly prominent. In addition, the exploitation and utilization of shale oil and gas also conform to the adjustment direction of my country's clean energy structure. Therefore, realizing large-scale development of shale oil and gas as soon as possible is of great significance to alleviating the shortage of oil and gas resources in my country, forming a new pattern of oil and gas exploration and development, changing my country's energy structure, ensuring national energy securi...

AI Technical Summary

Problems solved by technology

However, in order to accurately realize the thermal simulation under the geological conditions of shale oil and gas, the source rock hydrocarbon generation and the secondary cracking of oil should be realized in the same environment, which is obviously not possible with previous methods

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