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Method and device for determining water saturation of horizontal well reservoir

A technology for water saturation and horizontal well, which is used in earth-moving drilling, wellbore/well components, design optimization/simulation, etc. It can solve the problem of inaccurate calculation of water saturation in horizontal well logging, and improve the calculation accuracy. Effect

Pending Publication Date: 2020-08-04
PETROCHINA CO LTD
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Problems solved by technology

[0003] The main purpose of the present invention is to provide a method and device for determining the water saturation of horizontal well reservoirs, so as to solve the technical problem that the water saturation of horizontal well logging cannot be accurately calculated in the prior art

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  • Method and device for determining water saturation of horizontal well reservoir
  • Method and device for determining water saturation of horizontal well reservoir
  • Method and device for determining water saturation of horizontal well reservoir

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Embodiment Construction

[0049] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0050] Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware ...

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Abstract

The invention discloses a method and device for determining water saturation of a horizontal well reservoir. The method comprises the steps of determining the vertical resistivity and the horizontal resistivity of the reservoir according to resistivity data of the reservoir; determining an anisotropy coefficient of the reservoir according to the vertical resistivity and the horizontal resistivity;and calculating the water saturation of the reservoir according to rock physical parameters of the reservoir in the horizontal direction and the vertical direction and the anisotropy coefficient; wherein the rock physical parameters include a lithology coefficient, a lithology index, a cementation index and a saturation index. The method and device for determining the water saturation of the horizontal well reservoir solve the technical problem in the prior art that the water saturation of horizontal well logging cannot be accurately calculated.

Description

technical field [0001] The invention relates to the petroleum field, in particular to a method and a device for determining the water saturation of a horizontal well reservoir. Background technique [0002] The existing water saturation calculation method is to obtain the resistivity of the logging reservoir based on the vertical downhole measurement, and then apply the Archie's formula to calculate the water saturation of the reservoir. However, the resistivity obtained through vertical downhole measurement can only reflect the resistivity of the formation in the horizontal direction, and cannot reflect the resistivity in the vertical direction. Under horizontal well logging conditions, the formation is anisotropic, and the measured resistivity will be affected by both the horizontal resistivity of the formation and the vertical resistivity of the formation. Therefore, under horizontal well logging conditions, directly using the resistivity of the logging reservoir based o...

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Application Information

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IPC IPC(8): E21B49/00G06F30/20
CPCE21B49/00
Inventor 王昌学汪忠浩石玉江李长喜王长胜胡法龙曹文杰吴剑锋杜宝会
Owner PETROCHINA CO LTD
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