Method for evaluating influence of parent rock on reservoir physical properties

A technology of reservoir physical properties and parent rock, which is applied in the field of evaluation of the impact of parent rock on reservoir physical properties, can solve few problems such as simulating the reaction between organic acids and various types of cuttings

Active Publication Date: 2019-08-13
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0003] In the prior art, simulation experiments on the dissolution of acidic fluids mainly focus on the interaction of organic acids, atmospheric water, and mantle-derived carbon dioxide with single minerals such as quartz and feldspar. Response under actual formation temperature and pressure conditions

Method used

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  • Method for evaluating influence of parent rock on reservoir physical properties
  • Method for evaluating influence of parent rock on reservoir physical properties
  • Method for evaluating influence of parent rock on reservoir physical properties

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Embodiment 1

[0029] Below in conjunction with specific embodiment, take CFD6-4 oilfield Dongying Formation reservoir as example, the present invention is described in further detail:

[0030] 1. Experimental materials and procedures

[0031] 1. Experimental samples

[0032] The materials used in the experiment include surface fresh granite, andesite, rhyolite, slate, schist, gneiss, phyllite. Before the experiment, the massive cuttings were processed into two sets of rectangular cylinders with a length × width × height of 10 × 10 × 8mm, and the surface was smooth. One group was used for the dissolution experiment, and the other group was used for comparison after the reaction. ( figure 2 ).

[0033] 2. Preparation of reaction solution

[0034] Due to the acid-expelling effect during the thermal evolution of organic matter, according to the types and quantities of organic acids discharged from the pyrolysis of type II1 kerogen, the reaction solution was prepared with pure formic acid s...

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Abstract

The invention provides a method for evaluating the influence of parent rock on reservoir physical properties. The method comprises the following steps of: 1) selecting a representative rock sample according to the rock type distribution of a target reservoir and cutting into a block shape; 2) placing the rock sample into a hanging basket of a reaction kettle, adding an acid liquid and sealing; 3)carrying out temperature programming to target temperature and pressure and reacting for 36-72 hours at the constant temperature and under constant pressure; and 4) after completing the reaction, naturally cooling the reaction kettle, taking out the sample and analyzing, wherein the shape of the rock sample after cutting is one of a cube, a cuboid or a cylinder. The method has the beneficial effects that a new idea is provided for the analysis of the influence of the parent rock on the reservoir physical properties; and a foundation can be laid for the exploration of high-quality reservoirs byutilizing data of rock debris types and contents and the like in the research area and by combining with the actual temperature and pressure conditions.

Description

technical field [0001] The invention relates to an evaluation method for the influence of parent rock on the physical properties of reservoirs, belonging to the field of oil field exploration and production. Background technique [0002] Different types of parent rocks lead to differences in clastic compositions of reservoirs, and minerals such as feldspar and cuttings are easy to dissolve, which can improve the physical properties of reservoirs. Therefore, the content and type of cuttings also determine the quality of the reservoir. Among them, the dissolution of igneous rock cuttings is generally good, and its content is directly proportional to the secondary surface porosity; metamorphic rock cuttings are not easy to dissolve, and its content is inversely proportional to the surface porosity. The cuttings content and surface porosity of acidic extrusive rocks and migmatites are also positively correlated, which also shows that the type and content of parent rock are impo...

Claims

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Application Information

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IPC IPC(8): G01N17/00
CPCG01N17/00
Inventor 曲希玉曹英权王冠民王清斌陈思芮张洋晨高山
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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