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Method for distinguishing reservoir fluid type by adopting resistivity data

A fluid type and resistivity technology, which is applied in the fields of electrical/magnetic detection, electrical/magnetic exploration, and material resistance for logging records. It can solve the problem that the influence of resistivity is not excluded. low rates, etc.

Active Publication Date: 2013-05-01
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0005] The above methods still do not rule out the impact 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 distinguishing reservoir fluid type by adopting resistivity data
  • Method for distinguishing reservoir fluid type by adopting resistivity data
  • Method for distinguishing reservoir fluid type by adopting resistivity data

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Embodiment Construction

[0057] Refer to the attached figure 1 , the invention discloses a method for determining the type of reservoir fluid using resistivity data, the steps are as follows:

[0058] a. Accurately calculate reservoir shale content, rock composition and porosity through calibration logging of core data;

[0059] 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 :

[0060] ① Calibration logging of core data to calculate shale content

[0061] 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 paramete...

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Abstract

The invention discloses a method for distinguishing a reservoir fluid type by adopting resistivity data, relating to the technological field of petroleum and gas logging, geology and core test analysis. The method comprises the following steps of: a. logging by utilizing core data scales and accurately calculating reservoir shale content, rock constituent and porosity; b. eliminating the influence of rock characters and the porosity on resistivity; c. utilizing a core test to obtain the parameters of m, a, n and b reflecting a pore structure, calculating the resistivity lower limit RR of an air layer and eliminating the influence of the pore structure on the resistivity; and d. distinguishing the reservoir fluid type by comparing a deep-induction and deep- lateral resistivity value RT andthe resistivity lower limit RR of the air layer obtained in the step c. The invention eliminates the influence of non-fluid factors of the rock characters, the porosity, the pore structure and the like on the resistivity, and maintains and utilizes the response characteristics of fluids with different resistivities so as to greatly enhance the coincidence rate for distinguishing the reservoir fluid type.

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 the fluid types of 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 quickly and a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/18G01V3/38G01N27/04
Inventor 郑淑芬吴大奎费怀义高俊华陈杰刘晓鹏王君陈虹李兆影尹平彭湃
Owner BC P INC CHINA NAT PETROLEUM CORP
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