Method for making cracking rock core

A production method and core technology, applied in the direction of earthwork drilling and production, wellbore/well components, etc., to achieve the effect of realistic and accurate core fractures and simple methods

Inactive Publication Date: 2009-05-20
中国石化股份胜利油田分公司地质科学研究院
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for making fractured rock cores, solve the problem of making core models for special oil reservoirs, realize the accurate analysis of special oil reservoirs in indoor simulation tests for special oil reservoirs, and come up with reasonable development plans and The purpose of enhancing ultimate recovery

Method used

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Examples

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Embodiment Construction

[0010] For further disclosing the technical scheme of the present invention, the following are described in detail by the examples:

[0011] The method for making a fractured rock core includes making a core mold, sand, clay, aluminum phosphate and zinc flakes, mixing sand:clay:aluminum phosphate=50:16:10 by weight, stirring evenly, and loading In a mold of ￠2.5×2.5cm, place a zinc sheet 0.2mm thick, 15mm long, and 4mm wide horizontally in the middle of the mold, then put the mold on a press, press it under a pressure of 10Mpa, and put it into a high-temperature furnace after demoulding Internal firing, when the temperature reaches 910°C, reach the vaporization temperature of the zinc flakes, maintain this temperature for 50 minutes, stop the furnace to cool down after the zinc flakes are completely vaporized into gas and run away, and take out the cracked cores.

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Abstract

The invention relates to a manufacturing method of a fractured rock core, which comprises the steps of manufacturing a mould of the core, sand, clay, aluminium phosphate and a zinc sheet. The method is characterized in that the sand, clay and aluminium phosphate with the weight ration of 50 to 80 : 10 to 40 : 10 to 30 are mixed together, stirred evenly and put into a cylindrical or rectangular mould; then the zinc sheet simulating the fracture strike, shape, width and thickness of the core is put into the simulation position in the mould which is then placed on a pressing machine for shaping at the pressure of 1 to 50MPa by pressing; the sheet is placed in a high temperature furnace for baking after demoulding, the vapourizing temperature of the zinc metal sheet is reached when the temperature is more than 910 DEG C which is maintained for more than 10min; then the furnace is shut down till the zinc sheet is completely vaporized into gas; and when the temperature drops, the fractured rock core is taken out and manufactured.

Description

1. Technical field [0001] The invention relates to the field of geological analysis for oilfield development, in particular to a method for making fractured rock cores studied by simulating oil reservoirs. 2. Background technology [0002] Geological analysis is the main measure to determine whether the oilfield has development value and determine the development plan. In the process of oil field development, determining the thickness of the oil layer and the permeability of the oil layer requires core analysis, and determining the oil layer acidizing fracturing, water flooding, polymer flooding or burning the oil layer requires core analysis. The cores are not enough at all, not to mention that the obtained cores only represent the local conditions of the oil layer, not the entire oil layer. Geological researchers have to simulate and make some cores according to the well history and electrical survey maps to meet the needs of laboratory test analysis. This method has been ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
Inventor 王建孙志刚李奋吕思洲罗惠平段红斌韩春萍杨伟宇耿建梅徐树臣
Owner 中国石化股份胜利油田分公司地质科学研究院
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