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Method and device for obtaining anisotropic formation resistivity of horizontal well

A technology of formation resistivity and horizontal resistivity, applied in the field of geophysical exploration, can solve the problems of resistivity deviation, large oil saturation error, etc., and achieve the effect of contributing to accuracy

Active Publication Date: 2019-07-09
PETROCHINA CO LTD
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  • Claims
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Problems solved by technology

The resistivity measured by cable dual induction deviates from the real formation resistivity, and the error of parameters such as oil saturation calculated according to the resistivity measured by the dual induction is also relatively large

Method used

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  • Method and device for obtaining anisotropic formation resistivity of horizontal well
  • Method and device for obtaining anisotropic formation resistivity of horizontal well
  • Method and device for obtaining anisotropic formation resistivity of horizontal well

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Embodiment Construction

[0045] The details of the present invention can be understood more clearly in combination with the drawings and the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used to explain the purpose of the present invention, and cannot be construed as limiting the present invention in any way. Under the teaching of the present invention, the skilled person can conceive any possible modifications based on the present invention, and these should be regarded as belonging to the scope of the present invention.

[0046] In order to obtain the resistivity of anisotropic formations in horizontal wells more accurately, figure 1 Is a flowchart of the present invention in the embodiment, such as figure 1 As shown, in this application, the applicant proposes a method for obtaining the resistivity of an anisotropic formation in a horizontal well. The method includes the following steps:

[0047] S10...

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Abstract

The invention discloses a method and device for obtaining the resistivity of an anisotropic formation of a horizontal well, and relates to the technical field of geophysical exploration. The method comprises the steps that the relation among the preset horizontal resistivity, the deep and medium induction value difference, the log value of the deep induction value and the resistivity anisotropic coefficient of an experiment formation under different hole drift angle conditions is established through a numerical simulation method; and then the resistivity anisotropic coefficient of the target formation is obtained through fitting and calculating. The anisotropic resistivity obtained through the method can provide more accurate data support for formation mud containing situation analyzing and formation horizontal or vertical resistivity calculation so as to make an analyzing and calculation result more approximate to the practical formation situation, and the accuracy of reservoir assessment is facilitated accordingly.

Description

Technical field [0001] The invention relates to the technical field of geophysical prospecting, in particular to a method and a device for obtaining the resistivity of an anisotropic formation in a horizontal well. Background technique [0002] Formation resistivity is one of the important parameters for reservoir evaluation. Formation resistivity is closely related to oil exploration parameters such as logging potential, drilling time, oil and gas reserves, and oil saturation. In horizontal wells, it is often due to the presence of resistivity in various directions in the formation. The opposite sex phenomenon makes the measurement resistivity distortion. Therefore, obtaining the horizontal resistivity and vertical resistivity of anisotropic formations is an important work step in petroleum exploration. In the prior art, the horizontal resistivity and vertical resistivity of the formation are usually obtained according to laboratory measurements, but the continuous horizontal r...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00E21B47/022E21B47/00
CPCE21B47/00E21B47/022E21B49/00
Inventor 王昌学杜宝会吴剑锋曹文杰王环
Owner PETROCHINA CO LTD
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