Fluid identification method and device

A fluid identification and fluid technology, applied in the field of petroleum exploration, can solve the problem of inability to accurately identify fluids containing acid mineral conglomerate, and achieve the effect of improving accuracy

Active Publication Date: 2022-02-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The embodiment of the present invention provides a fluid identification method and device to at least solve the technical problem in the related art that fluids containing acidic mineral conglomerate cannot be accurately identified

Method used

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  • Fluid identification method and device

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Embodiment 1

[0036] According to an embodiment of the present invention, an embodiment of a method for fluid identification is provided. It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and, although A logical order is shown in the flowcharts, but in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0037] The following embodiments of the present invention can be applied to the exploration and development of various oil and gas reservoirs, including the exploration of various reservoir fluid types such as oil layers, natural gas layers, and water layers. The present invention does not limit the specific areas used, for example , applicable to the exploration and production process of Xinjiang Oilfield. Of course, the application environment of the embodiment of the present invention is not limited to...

Embodiment 2

[0061] In the embodiment of the present invention, an example block can be used for illustration (for example, the example block is a certain conglomerate block in Mahu Sag, Junggar Basin). The conglomerate reservoir contains a large amount of acidic volcanic debris, which affects the reservoir space, pore-throat ratio, and pore structure of the rock, and the reservoir has strong heterogeneity. Without considering the influence of other resistivity factors such as rock minerals, the rock conducts electricity only through the formation water in the pores, and the resistivity is mainly controlled by the size of the pore throat. The acidic mineral composition affects the throat space and thus the resistivity. Therefore, the present invention proposes a conglomerate reservoir fluid identification method considering the influence of acid mineral content. According to the method and technology provided by the invention, the influence of the acidic mineral composition on the fluid i...

Embodiment 3

[0077] The specific implementation device of the present invention will be described below. Optionally, the following fluid identification device may correspond to the above-mentioned fluid identification method.

[0078] Figure 5 A schematic diagram of a fluid identification device according to an embodiment of the present invention, such as Figure 5 As shown, the device may include: a determination unit 51, used to determine the classification critical value of the acid mineral content used to classify the conglomerate reservoir; Acidic mineral content, classifying the conglomerate reservoir to obtain the classification result of the conglomerate reservoir; establishing a unit 55, which is used to establish a cross map of acidic mineral content and resistivity corresponding to the classification result of the conglomerate reservoir; identification unit 57, for Identify fluid types in conglomerate reservoirs based on acid mineral content versus resistivity crossplots.

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Abstract

The invention discloses a fluid identification method and device. Wherein, the method includes: determining the classification critical value of the acid mineral content for classifying the conglomerate reservoir; according to the classification critical value and the acid mineral content in the conglomerate reservoir, classifying the conglomerate reservoir to obtain the conglomerate Reservoir classification results; establish a crossplot of acidic mineral content and resistivity corresponding to the classification results of conglomerate reservoirs; identify the type of fluid in the conglomerate reservoir according to the crossplot of acidic mineral content and resistivity. The invention solves the technical problem in the related art that fluids containing acidic mineral conglomerate cannot be accurately distinguished.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a fluid identification method and device. Background technique [0002] In related technologies, for the exploration and development of oil and gas reservoirs, the identification of reservoir fluid properties is an important task of logging evaluation. Common fluid property identification methods are summarized as follows: resistivity method, crossplot method, P 1 / 2 method, nuclear magnetic resonance logging discrimination method, etc. For conglomerate reservoirs containing acidic minerals, affected by the eruptive diagenetic mechanism of acidic volcanic rocks, the reservoir space is generally dominated by primary pores and secondary pores, with a large pore-throat ratio and complex pore structure, showing extremely strong At the same time, the analysis and research on the relationship between the content of acidic mineral components and resistivity found that whe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 唐勇瞿建华吴俊张磊钱海涛安志渊李鹏
Owner PETROCHINA CO LTD
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