Petroleum filling simulation method and system for tight reservoir

Abstract

The invention discloses a petroleum filling simulation method and system for a tight reservoir. The method comprises the following steps that first samples corresponding to the tight reservoir and second samples corresponding to an objective source rock are obtained; the first samples are subjected to pretreatment, burden pressure physical property measurement and stratum water injection are conducted, and first data are obtained; the second samples are subjected to total organic carbon, pyrolysis and maturity measurement, the second samples with the maturity lower than a preset value are subjected to a hydrocarbon-generation kinetic test of an open system, and second data are obtained; according to well logging data, the first data and the second data, the source storage configuration relation of the tight reservoir is determined, the first samples and the second samples are filled according to the relation, and simulation samples are obtained; and according to the stratum burial history, the thermal history and the temperature and the pressure of a current stratum, the simulation samples are subjected to petroleum distribution measurement after a geological process constraint simulation experiment, and the petroleum distribution conditions are determined. According to the petroleum filling simulation method and system for the tight reservoir, raw petroleum generated by the source rock and the composition thereof can be truly simulated.

Description

technical field [0001] The invention relates to the field of petroleum exploration and development, in particular to a tight reservoir petroleum charging simulation method and system. Background technique [0002] Tight reservoirs have the characteristics of tight lithology, low porosity and low permeability, low gas reservoir pressure coefficient, and low natural productivity. As an unconventional reservoir, it has great development difficulties and requirements. At present, although tight oil has been developed to a certain extent through horizontal wells and volume fracturing. However, due to the development of micro-nano pore throats in tight reservoirs that are different from conventional reservoirs, the mechanism of crude oil charging, migration and accumulation in micro-nano pore throats is still unclear, which limits the exploration of tight reservoirs to a certain extent. develop. [0003] At present, the existing domestic research and its corresponding simulation...

AI Technical Summary

Problems solved by technology

Especially in tight reservoirs, using the traditional high-pressure pumping fluid method basically cannot realize the effective accumulation of crude oil in tight reservoirs; moreover, it is difficult to completely simulate the crude oil generated by source rocks and its composition with the current liquid supply system commonly used for simulation Therefore, it is necessary to provide new methods and equipment for tight reservoirs to realize the simulation of oil and its composition generated by source rocks, so as to guide the exploration and development of tight reservoirs

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