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Diagenetic facies recognition method

An identification method and diagenesis technology, applied in the field of diagenetic facies classification and evaluation, can solve expensive, time-consuming and costly problems, and achieve the effect of time-consuming and expensive solutions

Active Publication Date: 2016-06-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a method for identifying diagenetic facies, which solves the time-consuming and expensive technical problems in the existing core analysis process

Method used

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  • Diagenetic facies recognition method

Examples

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Embodiment 1

[0082] In this example, the diagenetic facies of the Xu2 Member in the A area were identified and classified, and according to the diagenetic mineralization and diagenetic mineral types in the Xu2 Member in the A area, it is known that the diagenetic mineral content can represent the change of the diagenetic facies, so , in this embodiment, the diagenetic mineral content of the second member of the Xu Member in the A area was measured, and the determination results of the diagenetic facies mineral content are as follows Figures 1a-1d As shown, among them, Figure 1a It is a schematic diagram of the relationship between the interstitial content and the core density in the diagenetic minerals of the second member of Xu in the area A of the present invention; Figure 1b It is a schematic diagram of the relationship between the content of calcite and the content of interstitials in the diagenetic minerals of Member Xu 2 in A region of the present invention; Figure 1c It is a sch...

Embodiment 2

[0099] In this embodiment, the diagenetic facies in area B are identified and classified, wherein, according to the diagenetic mineralization and diagenetic mineral types in area B, it is known that the intensity of diagenesis can represent the change of diagenetic facies. Therefore, in this embodiment, Measure the diagenesis intensity, obtain the diagenetic comprehensive coefficient according to the obtained diagenetic intensity, and establish the relationship between the diagenetic comprehensive coefficient and the porosity or permeability according to the obtained diagenetic comprehensive coefficient and the measured porosity or permeability. In this embodiment, The relationship between diagenetic comprehensive coefficient and porosity and permeability is as follows: Figure 2a-2b as shown, Figure 2a It is a schematic diagram of the relationship between diagenetic comprehensive coefficient and porosity in B area of ​​the present invention; Figure 2b It is a schematic dia...

Embodiment 3

[0112] In this embodiment, the diagenetic facies in the C area are identified and classified, wherein, according to the diagenetic mineral action and diagenetic mineral types in the C area, it is known that the diagenetic mineral content can represent the change of the diagenetic facies. Therefore, in this embodiment, The content of diagenetic minerals in area C was determined, and the determination results of diagenetic facies minerals are as follows: Figures 3a-3g As shown, among them, Figure 3a It is a schematic diagram of the relationship between porosity and interstitial content in diagenetic minerals in area C of the present invention; Figure 3b It is a schematic diagram of the relationship between the content of interstitials and the content of matrix in diagenetic minerals in area C of the present invention; Figure 3c It is a schematic diagram of the relationship between the cement content and the calcite content in the diagenetic minerals in the C area of ​​the p...

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Abstract

The present invention provides a diagenetic facies recognition method, the diagenetic facies recognition method comprises obtaining of diagenetic facies characterization parameters, and obtaining of the integrative modulus of diagenesis according to the obtained diagenesis intensity, wherein the obtaining of the diagenetic facies characterization parameters comprises measurement of diagenesis intensity or the diagenesis intensity and diagenetic mineral content; or, the diagenetic facies recognition method comprises obtaining of diagenetic facies characterization parameters, and the obtaining of the diagenetic facies characterization parameters comprises measurement of the diagenetic mineral content. According to the obtained integrative modulus of diagenesis or diagenetic mineral content, a reservoir diagenetic facies type can be recognized, the time-consuming and high-cost technical problems of rock core analysis process in the prior art can be solved, and a quantitative evaluation of reservoir diagenetic facies can be achieved.

Description

technical field [0001] The invention relates to the technical field of diagenetic facies classification and evaluation, in particular to a method for identifying diagenetic facies of low-permeability clastic rocks. Background technique [0002] Diagenetic facies is the result of the comprehensive action of tectonic evolution, fluid, temperature and pressure on sediments. Diagenetic facies includes comprehensive features such as rock particles, cement, fabric, pores, caves and fractures. The core content of diagenetic facies is mineral composition and fabric appearance. , is mainly a genetic marker that characterizes the nature, type, and quality of reservoirs. Therefore, through the evaluation of diagenetic facies, the spatial distribution of different types of diagenetic facies can be determined, the distribution area of ​​favorable diagenetic facies can be quantitatively predicted, and then favorable reservoirs can be determined. layer distribution. [0003] At present, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
Inventor 肖承文王招明王贵文陈伟中信毅杨宁韩闯吴大成王建伟王华玮周磊赖锦
Owner PETROCHINA CO LTD
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