Method capable of realizing quantitative prediction on favorable oil gas accumulation area

Abstract

The invention belongs to the oil gas exploration exploitation field and particularly relates to a method capable of realizing quantitative prediction on a favorable oil gas accumulation area. The method comprises steps that, (1), parameters capable of representing oil gas accumulation influence factors and a mathematics calculation method thereof are determined; (2), a main control oil gas accumulation factor is determined; an influence factor of the main control oil gas accumulation factor is determined; (4), a mathematics model of the main control oil gas accumulation influence factor is established; (5), a mathematics model capable of comprehensively evaluating the oil gas accumulation potential is established; and (6), calculation result mapping and evaluation are carried out. According to the statistics relationship among oil gas distribution, output capacity and the main control factor, a conception model and the mathematics model of the main control factor influencing oil gas accumulation in a deposition basin are established, quantitative evaluation on oil gas accumulation under the control of multiple factors in a certain area is carried out, and evaluation on the oil gas accumulation condition is switched from a traditional qualitative mode to a quantitative mode .

Description

technical field [0001] The invention belongs to the field of oil and gas exploration and development, and in particular relates to a method for quantitatively predicting favorable oil and gas accumulation areas, which is used for quantitatively predicting favorable oil and gas distribution areas in sedimentary basins. Background technique [0002] Studying the distribution of favorable oil and gas accumulation areas and even the spatial distribution of oil and gas resources, so as to accurately predict the spatial distribution of undiscovered oil and gas resources, is of great significance for reducing oil and gas exploration risks, optimizing exploration targets, and improving the success rate of oil and gas drilling. The prediction of favorable oil and gas accumulation areas is an important supplement and extension to traditional resource evaluation methods. By evaluating the distribution of favorable oil and gas accumulation areas, the risk visualization of oil and gas ex...

AI Technical Summary

Problems solved by technology

The problem with this method is that the collection of geochemical indicators along the migration path is obtained through underground core sampling and testing. These cores are often very limited and cannot form an effective spatial distribution of geochemical indicators. The underground oil and gas migration path is The distribution of three-dimensional space, so the limited distribution of geochemical indicators is difficult to reveal the favorable migration path, so as to really play a role in predicting the favorable accumulation area of ​​oil and gas

These methods cannot be used to analyze and select regional oil and gas accumulation areas because there is no comprehensive analysis of hydrocarbon migration dynamics-channels-sand body integration

However, the oil and gas migration paths established by geochemical indicators are based on the detection of limited samples, and cannot obtain spatially continuous indicator distributions, so the heterogeneous migration of oil and gas in space cannot be evaluated with high precision, and Its data are all obtained from the detection of a large number of samples, which is expensive, and a large number of samples is not realistic, thus limiting its wide application

At the same time, the traditional evaluation of oil and gas accumulation under the control of multiple factors mostly adopts qualitative analysis and lacks effective quantitative evaluation methods.

Images