Method for discriminating type of reservoir fluid by using resistivity data

A technology of fluid type and resistivity, which is applied in electrical/magnetic detection, electrical/magnetic exploration, and re-radiation for well logging records. question

Inactive Publication Date: 2011-04-13
四川西德电器有限公司
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Problems solved by technology

However, this method still does not rule out the influence of non-fluid factors such as lithology, porosity, and pore structure on resistivity, and the coincidence rate of reservoir fluid type identification is still low.

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  • Method for discriminating type of reservoir fluid by using resistivity data
  • Method for discriminating type of reservoir fluid by using resistivity data
  • Method for discriminating type of reservoir fluid by using resistivity data

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Embodiment Construction

[0058] The invention discloses a method for judging reservoir fluid types by using resistivity data. The steps are as follows:

[0059] A. Accurately calculate the shale content, rock composition and porosity of the reservoir through calibration logging of core data;

[0060] Core calibration logging is one of the logging processing technologies widely used in the logging field at present, and the existing core calibration logging technology can be used; but better, we have made a major breakthrough on the basis of the original technology, the specific method is as follows :

[0061] ① Calibration logging of core data to calculate shale content

[0062] Use the core data such as X-ray diffraction analysis results and electron microscope scanning analysis results to determine the clay type and clay properties, comprehensively analyze the logging data, give priority to the calculation of the logging curve, calculation method and processing parameters of the shale content, and u...

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Abstract

The invention discloses a method for discriminating the type of reservoir fluid by using resistivity data, which relates to the technical field of oil and gas logging as well as geology and core experiment analysis, and comprises the steps of: a, logging the well through scaling core data, and correctly calculating the mud content, the rock constituents and the porosity of the reservoir fluid; b, eliminating the influence from the lithology and the porosity to the resistivity; c, obtaining m, a, n and b by using core experiment to reflect the parameters of the pore structure, calculating the lower limit RR of the gas-layer resistivity, and eliminating the influence from the pore structure to the resistivity; and d, discriminating the type of the reservoir fluid through comparing a deep lateral resistivity RT in deep induction with the lower limit RR of the gas-layer resistivity obtained in the step c. The method eliminates the influence from the non-fluid factors such as the lithology, the porosity, and the pore structure and the like to the resistivity, and retains and utilizes the response characteristics of different fluids for the resistivity so as to greatly improve the coincidence rate of the discriminating the type of the reservoir fluid.

Description

technical field [0001] The invention relates to the technical fields of oil and gas well logging, geology and core test analysis, in particular to a method for accurately identifying reservoir fluid types such as gas layers, oil layers and water layers by using resistivity data. Background technique [0002] The resistivity-gas (oil) layer lower limit resistivity fluid discrimination method belongs to the scientific research innovation in the field of oil and gas exploration and development, mainly using high-tech logging data, geological data and core experiment data to study fluid factors such as natural gas (oil) and formation water As well as the resistivity response characteristics and influence degree of non-fluid factors such as lithology, porosity, and pore structure, the non-fluid response factors of resistivity value are excluded, and finally the resistivity response attribute reflecting the fluid type is extracted, and the value of this attribute is In order to qu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/18G01V3/38
Inventor 马伦建冯朝登
Owner 四川西德电器有限公司
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