Lithofacies Analysis Method of Continental Fine-grained Sedimentary Rock

A technology for sedimentary rock and facies analysis, applied in earthwork drilling, wellbore/well components, etc., can solve problems such as narrow application range, and achieve the effect of optimizing fracturing section selection and improving single well production

Active Publication Date: 2022-02-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to propose a lithofacies analysis method for continental fine-grained sedimentary rocks, which can overcome the defects of the narrow scope of application of existing analysis methods, can finely evaluate the lithofacies of continental fine-grained sedimentary rocks, and then determine the lithofacies that are beneficial to geology and engineering

Method used

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  • Lithofacies Analysis Method of Continental Fine-grained Sedimentary Rock
  • Lithofacies Analysis Method of Continental Fine-grained Sedimentary Rock
  • Lithofacies Analysis Method of Continental Fine-grained Sedimentary Rock

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Embodiment

[0084] Embodiments of the present invention are for rock phase analysis in a multi-well medium such as Sichuan Basin XL101, and the analysis method includes the following steps:

[0085] Step 1: Extract the core of finely deposited rock, identify the rock or rock combination interface in the core

[0086] Extract the core of the midwhile fine particle deposition rock to the core well, which is finely described, and the mutation between different rock properties, the gradient or rocky combination interface of the gradient is performed.

[0087] Step 2: Based on rock or rocky combination interface, determine the method of rock or rock sexual combination

[0088] First, according to the difference between the thickness D of the rock or the rock component, it is determined according to the rock phase classification rules, the lithographic or lithographic combination of fine particle deposition rocks is determined. In a single rocky interface of D 50cm, the rock resistance is shale, t...

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Abstract

A lithofacies analysis method for continental fine-grained sedimentary rocks, comprising: classifying lithofacies according to lithology or lithological combination, organic carbon content, silicon content and calcium content, and establishing lithofacies classification rules; extracting fine-grained sedimentary rocks to be analyzed Identify the lithology or lithology combination interface in the core, and determine the lithofacies type of the fine-grained sedimentary rock to be analyzed based on the lithology or lithology combination and lithofacies classification and nomenclature rules; determine each type of lithofacies respectively The characteristic parameters are used to determine the favorable lithofacies and establish the logging evaluation criteria for favorable lithofacies. The lithofacies analysis method classifies lithofacies through lithological combination, organic carbon abundance, siliceous abundance and calcareous abundance, and establishes lithofacies classification rules, so that it can be applied to continental fine-grained sedimentary rocks.

Description

Technical field [0001] The present invention relates to the field of shale gas exploration and development, and more particularly to a rock phase analysis method of land phase fine grain deposition rock. Background technique [0002] Fine-grained sedimentary Rock refers to a deposition rock, a particle size of <62 μm, which mainly comprises clay mineral, abrasive, carbonate, and organic matter (Schieber Andzimmerle, 1998; Aplin) And macquaker, 2011; ginger, 兴, 2013). The pilot development is called shale, and the pages are not developed, called the muddy rock (ginger, etc., 2013). The fine deposition rock is the material foundation formed by shale gas, both domestic or abroad, shale gas is produced from fine deposition rocks. [0003] my country has developed the sea, Lu Xiang and the sea and land transitional phases in the process of multi-rotating construction, and the rock gas resources is rich in penetrating mud. 25.08 × 10 in the national shale gas 12 m 3 (According to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 朱彤龙胜祥胡宗全彭勇民王烽路菁
Owner CHINA PETROLEUM & CHEM CORP
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