Reservoir compressibility testing method based on marine shale hydration characteristics

A testing method and reservoir technology, applied in measurement, earthwork drilling, wellbore/well components, etc., can solve problems affecting hydraulic fracturing reconstruction plan and design, affect fracturing effect, and do not consider marine shale hydration Features and other issues

Active Publication Date: 2020-07-14
BC P INC CHINA NAT PETROLEUM CORP +1
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AI Technical Summary

Problems solved by technology

The existing fracability evaluation methods do not consider the hydration characteristics of marine shale, resulting in reservoirs with similar fracability obtained by conventional methods, the complexity

Method used

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  • Reservoir compressibility testing method based on marine shale hydration characteristics
  • Reservoir compressibility testing method based on marine shale hydration characteristics
  • Reservoir compressibility testing method based on marine shale hydration characteristics

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example 1

[0056] like figure 1 As shown, the reservoir fracability test method based on the hydration characteristics of marine shale may include the following steps:

[0057] (1) Measure the appearance size of the experimental rock pillar, including diameter, length and mass, and test the liquid density of the fracturing fluid;

[0058] (2) Dry the rock pillar at 105°C until the weight does not change;

[0059] (3) Configure the fracturing fluid to be used, and make the core to be evaluated into a rock pillar with a diameter of 2.5 cm and a length ≥ 8 cm;

[0060] (4) Put the fracturing fluid liquid into a glass container and place it in a water bath and heat it to the corresponding temperature of the coring formation;

[0061] (5) Place the electronic balance (accuracy 0.0001g) on ​​the water bath and isolate it with a heat-insulating cover. The vertical space position of the electronic balance can be passed through figure 2 and image 3 The lifting frame shown is adjustable, con...

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Abstract

The invention provides a reservoir compressibility testing method based on marine shale hydration characteristics. The reservoir compressibility testing method comprises the steps of under the stratumtemperature of a stratum wherein a rock column is obtained, carrying out a hydration experiment on the rock column through a fracturing fluid, recording experimental data, and obtaining the length ofthe rock column, the imbibition rate of the rock column in the imbibition stage of the hydration process and the square root of the hydration time according to the experimental data; after the hydration experiment is finished, drying the rock column until the mass of the rock column is not changed, and then testing tensile strength, compressive strength and clay mineral content of the rock column; and calculating a dimensionless compressibility index of rock according to the compressive strength, the tensile strength, the imbibition rate, the length of the hydrated rock column, the square root of the hydration time and the clay mineral content, wherein the higher the compressibility index is, the higher the compressibility is. The reservoir compressibility testing method based on the marine shale hydration characteristics includes the efficient effects that the reservoir compressibility testing method is simple, convenient and high in operability, and can make up for the deficiency ofan existing compressibility evaluation method and guide a hydraulic fracturing modification strategy.

Description

technical field [0001] The invention relates to the technical field of oil and gas reservoir hydraulic fracturing stimulation, in particular to a method for testing the compressibility of reservoirs based on the hydration characteristics of marine shale. Background technique [0002] The National Energy Administration's "Shale Gas Development Plan (2016-2020)" pointed out that the state has increased its support for shale gas scientific and technological research, established a national energy shale gas research and development (experimental) center, and focused on "large oil and gas fields and coalbed methane development" "The research project of "Key Technologies for Shale Gas Exploration and Development" was set up in the National Science and Technology Major Project, and "Evaluation of Occurrence and Enrichment Mechanism and Resource Potential of Paleozoic Shale Gas in South Paleozoic" and "Southern Marine Facies Page Fundamental Research on Efficient Development of Rock...

Claims

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Application Information

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IPC IPC(8): E21B49/00E21B47/00E21B43/26
CPCE21B49/00E21B47/00E21B43/26
Inventor 杨海李军龙伍洲石孝志朱炬辉管彬陈明忠郭凌峣周文高李松林
Owner BC P INC CHINA NAT PETROLEUM CORP
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