Method for Quantitative Prediction of Favorable Oil and Gas Accumulation Areas

Abstract

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, including the following steps: (1), establishing parameters and mathematical calculation methods that can characterize oil and gas accumulation influencing factors, (2), Determine the main controlling factors of oil and gas accumulation, (3), determine the influencing factors of the main controlling factors of oil and gas accumulation, (4), establish the mathematical model of the main controlling factors affecting oil and gas accumulation, (5), establish a mathematical model for comprehensive evaluation of oil and gas accumulation potential , (6), graph and evaluate the calculation results. According to the statistical relationship between oil and gas distribution, production capacity and main controlling factors, the present invention establishes the conceptual model and mathematical model of the main controlling factors affecting oil and gas accumulation in sedimentary basins, and can quantitatively evaluate the oil and gas accumulation under the control of multiple factors in a certain area , realized oil and gas accumulation conditions from traditional qualitative evaluation to quantitative evaluation.

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.

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