Permeability determination method and device based on rock induced polarization

Abstract

The invention provides a permeability determination method and device based on rock induced polarization. The method comprises the steps: generating the measurement polarizability of a rock core according to complex resistivity data of the rock core of a reservoir in a research area and a corrected GEMTIP model; generating the theoretical polarizability of the rock core according to the induced polarization parameter of the rock core and the corrected GEMTIP model; and generating the reservoir conventional permeability of the research area according to the characteristic permeability of the rock core, the measurement polarizability and the theoretical polarizability. The method provided by the invention effectively solves the problem of inaccurate measurement of permeability of low-porosity, low-permeability and compact reservoirs by a conventional electrical method, thereby providing important parameter basis for evaluation and efficient exploitation of unconventional oil and gas reservoirs.

Description

technical field [0001] The invention relates to the fields of petroleum and natural gas exploration and development, in particular to a technology combining rock physics and electromagnetic exploration, and in particular to a method and device for determining permeability based on rock induced polarization. Background technique [0002] With the deepening of oil and gas exploration, the exploration technology of conventional sandstone reservoirs has become very mature, while the conventional sandstone exploration targets are becoming rarer and rarer. At the same time, the proportion of unconventional reservoir targets such as tight rock and shale is increasing, and their importance in oil and gas exploration is also becoming more and more significant. With the discovery of hundreds of millions of tons of predicted reserves in a tight rock oil field in a certain area of ​​my country, it indicates the huge exploration potential of tight rock in major sedimentary basins in my c...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems in the prior art, the present invention can establish a method and device for accurately calculating the permeability of low-porosity, low-permeability, and tight reservoirs, which effectively solves the problem of conventional electrical methods on the permeability of low-porosity, low-permeability, and tight reservoirs. Inaccurate measurement, so as to provide important parameter basis for unconventional oil and gas reservoir evaluation and efficient development

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