Volcanic rock high-porosity low-permeability reservoir reserve calculation method based on multi-factor permeability

Abstract

The invention discloses a volcanic rock high-porosity low-permeability reservoir reserve calculation method based on multi-factor permeability. According to the method, logging data, coring data and geological data of a target well are utilized, the porosity and permeability of a core of the target well are measured, a porosity and permeability cross plot is drawn, the relation between the porosity and the permeability in the target well is established, the influence of a high-porosity and low-permeability reservoir on reserve calculation is analyzed, and then the influence of a pore structure on seepage characteristics is anlayzed according to a scanning electron microscope graph of the core of the target well, the reserves of a target well is calculated by using single-factor permeability and multi-factor permeability based on a volumetric method, reserves calculation results adopting the single-factor permeability and the multi-factor permeability are compared, the difference of calculation results of different reserves calculation lower limits is analyzed, and the accuracy of reserve calculation of the multi-factor permeability is verified by using a high-porosity and low-permeability reservoir in the target well. According to the method, the influence of the complex diagenesis on volcanic high-porosity low-permeability reservoir reserve calculation is comprehensively considered, and the calculation precision of the reserves can be improved.

Description

technical field [0001] The invention relates to the field of exploration and development of oil and gas fields, in particular to a method for calculating reserves of volcanic rock high-porosity and low-permeability reservoirs based on multi-factor permeability. Background technique [0002] Volcanic oil and gas reservoirs are currently one of the most popular exploration and development targets at home and abroad, with large reserves and considerable single well production, which have good exploration and development value. As the demand for oil and gas resources in various countries continues to increase, volcanic rock oil and gas reservoirs have attracted more and more attention. Due to the influence of different magma properties, eruption patterns, and later tectonic diagenesis, the lithology and lithofacies of this type of reservoir are complex and diverse, with large vertical and horizontal changes, lithology identification is more complicated, and the impact on reservo...

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Problems solved by technology

[0005] Aiming at the problem that it is difficult to accurately calculate the reserves of volcanic rock high-porosity and low-permeability reservoirs at the present stage, the present invention proposes a calculation method for volcanic rock high-porosity and low-permeability reservoir reserves based on multi-factor permeability, which solves the problem of volcanic rock high-porosity and low-permeability reservoir reserves The determination of the lower limit standard of multi-factor permeability in the calculation improves the accuracy of the calculation of reserves of volcanic rock high porosity and low permeability reservoirs

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