Resistivity correction method based on stratum simulation

Abstract

The invention discloses a resistivity correction method based on stratum simulation. The method comprises the following steps of establishing a theoretical model of different lithology resistivity changing with factors including temperature, pressure and porosity through laboratory testing, correcting logging data of rock electrical property in a measuring area and laboratory measurement data to corresponding stratum conditions, and establishing an effective geoelectric initial model. According to the method, the temperature and pressure environments of different depths of the measuring area where the rock sample is positioned are simulated, the complex resistivity amplitude and phase of the rock under different depth conditions are measured, the relation between the rock induced polarization parameter and the temperature and pressure is obtained, then existing geoelectric data is corrected, an initial geoelectric model under the electromagnetic exploration significance is obtained, the purpose is to solve the problem that logging data, laboratory data and exploration conditions of rock geoelectric are not matched, and an important parameter basis is provided for electromagnetic exploration inversion interpretation and evaluation.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas exploration and development, relates to rock physics and electromagnetic exploration technology, and in particular relates to a resistivity correction method based on stratum simulation. Background technique [0002] Petroleum exploration is to find and ascertain oil and gas resources, use various exploration methods to understand the underground geological conditions, understand oil generation, oil storage, oil and gas migration, accumulation, preservation and other conditions, comprehensively evaluate oil and gas prospects, and determine the location of oil and gas accumulation. Find traps for oil and gas storage in favorable areas, ascertain the area of ​​oil and gas fields, find out the situation of oil and gas layers and the process of output capacity, and increase crude oil reserves and related oil and gas products for the country. [0003] In recent years, with the increas...

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Problems solved by technology

[0005] Aiming at the above-mentioned problems existing in the prior art, the present invention provides a resistivity correction method based on formation simulation. The method uses the high-temperature and high-pressure rock physics experiment system (AUTOLAB1000) as a means to simulate Temperature and pressure environment, measure the amplitude and phase of complex resistivity at different depths of rocks, obtain the relationship between rock IP parameters and temperature and pressure, and then correct the existing geoelectric data to obtain the initial geoelectric model in the sense of electromagnetic exploration, Its purpose is to solve the problem of mismatch between rock geoelectric logging data, laboratory data and exploration conditions, and provide important parameter basis for electromagnetic exploration inversion interpretation evaluation

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