A reserve calculation method for volcanic high-porosity and low-permeability reservoirs based on multi-factor permeability

Abstract

The invention discloses a method for calculating reserves of volcanic rock high-porosity and low-permeability reservoirs based on multi-factor permeability. The present invention utilizes the well logging data, coring data and geological data of the target well, and by measuring the porosity and permeability of the core of the target well, draws a pore-permeability intersection diagram, establishes the relationship between the porosity and permeability in the target well, and analyzes the porosity and permeability of the target well. The impact of seepage reservoirs on the calculation of reserves, and then according to the scanning electron microscope image of the core of the target well, the influence of pore structure on the seepage characteristics is analyzed, and the reserves of the target well are calculated using the single-factor permeability and multi-factor permeability based on the volumetric method. Based on the reserve calculation results of factor permeability and multi-factor permeability, the difference in the calculation results of different reserve calculation lower limits is analyzed, and then the high-porosity and low-permeability reservoir in the target well is used to verify the accuracy of reserve calculation based on multi-factor permeability. The invention comprehensively considers the influence of complex diagenesis on the calculation of reserves of volcanic high-porosity and low-permeability reservoirs, which is beneficial to improving the calculation accuracy of reserves.

Description

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

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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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