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Method and system for measuring electrical response characteristics of rock core in different wetting states

A technology of response characteristics and wettability, applied in the field of geophysical exploration, can solve the problem of no public method and system for measuring electrical response characteristics, so as to reduce the change of wettability, improve efficiency, and achieve accurate and reliable results. Effect

Pending Publication Date: 2021-05-11
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] However, there is no method and system for measuring the electrical response characteristics of the same core under different wetting states in the prior art.

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  • Method and system for measuring electrical response characteristics of rock core in different wetting states
  • Method and system for measuring electrical response characteristics of rock core in different wetting states
  • Method and system for measuring electrical response characteristics of rock core in different wetting states

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Embodiment Construction

[0069] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0070] The present invention provides a method and system for determining the electrical response characteristics of rock cores under different wetting states. Obtain target cores and collect formation crude oil; configure brine with specific salinity according to experimental requirements, and measure the density of crude oil and brine and the nuclear magnetic resonance T of crude oil 2 The target core is subjected to three treatments: no oil washing, oil washing and salt washing, and oil washing and salt washing followed by oil flooding to change the wettability, that is, modification. Wetting state by measuring the state of bound water during processing by NMR T 2 The USBM index obtained from the spectrum and capillary force curve is determined; the rock-electricity curve of these three processes is measured to realize the petrophysical measurement of the electric...

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Abstract

The invention provides a method and a system for measuring electrical response characteristics of a rock core in different wetting states, and belongs to the field of geophysical exploration. The method comprises the following steps: (1) acquiring experimental data of the same rock core in different wetting states, wherein the experimental data comprises nuclear magnetic resonance T2 spectrum, rock core weight and resistivity; (2) carrying out qualitative characterization on wettability in different wetting states by using a nuclear magnetic resonance T2 spectrum; obtaining a capillary force curve by using the weight of the rock core, and then quantitatively characterizing the wettability by using the capillary force curve; and (3) obtaining the electrical response characteristics of the rock core in different wetting states by using the resistivity. According to the method, the same rock core can be processed into different wetting states on the premise that the pore structure is not damaged, the wettability and resistivity of the same rock core in different wetting states can be measured, and the efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the field of geophysical exploration, and in particular relates to a method and system for measuring electrical response characteristics of rock cores under different wetting states, which are used for measuring electrical response characteristics and systems of the same rock core under multiple wetting states. Background technique [0002] Measuring the electrical response characteristics of the same core under different wetting states is the key to clarify the influence law and mechanism of wettability on the electrical response characteristics, mainly including modifying the same core without affecting its pore structure and the measurement of electrical response characteristics under different wetting states. [0003] In the prior art, Chinese patent publication CN109507241A discloses a new method and equipment for measuring rock wettability by electrical resistance method, which mainly solves the problem of measuring wetta...

Claims

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Application Information

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IPC IPC(8): G01R27/02G01N24/08G01N5/04
CPCG01R27/02G01N24/081G01N5/045
Inventor 韩玉娇李永杰谢关宝吴海燕
Owner CHINA PETROLEUM & CHEM CORP
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