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A simulation experiment method for large-scale salt horizontal interconnected well group water-solution cavity creation

A simulation experiment and water-soluble cavity-making technology, which is applied in the direction of material inspection products, soil material testing, instruments, etc., can solve the problem of small size and achieve the effect of increasing the construction speed

Active Publication Date: 2021-02-26
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to solve the technical bottleneck of how to make the horizontal cavity regular in shape and larger in size, to solve the problem of small size caused by the insoluble cavity in the horizontal area, and to prevent and control the rapid dissolution of the top plate of the cavity and the horizontal channels and pipelines Blockage and other underground disasters

Method used

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  • A simulation experiment method for large-scale salt horizontal interconnected well group water-solution cavity creation
  • A simulation experiment method for large-scale salt horizontal interconnected well group water-solution cavity creation
  • A simulation experiment method for large-scale salt horizontal interconnected well group water-solution cavity creation

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Experimental program
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Effect test

Embodiment Construction

[0052] 1. Preparation of molded salt test pieces:

[0053] First, according to the geological structure characteristics of the thin salt layer area where the oil and gas storage cavity is to be built, simulate the composition of the thin salt layer area to configure salt powder, and then use a super-large-sized salt pressing mold to make a length of It is a super-large salt specimen of 800mm, width 400mm, and height 500mm.

[0054] 2. Simulation experiment method of water-solution cavity creation in horizontally connected well group:

[0055] 1. Carry out manual grinding treatment on the above-mentioned type of salt test piece, especially focus on one of the large surfaces (that is, the plane that needs to be bonded with the transparent hard board) to improve the flatness of the surface of this type of salt test piece.

[0056] 2. Groove the molded salt specimen:

[0057] Using a drilling rig with a drill bit diameter of 6 mm, an oblique wellbore slot, a straight wellbore sl...

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Abstract

A method for simulating and experimenting large-scale salt horizontal interconnected well group water-soluble cavity building, which relates to the technical fields of cavity shape expansion law and control in cavity building in thin salt layer areas, and downhole disaster prevention and control. The present invention obtains the control of cavity shape in the process of water-solution cavity formation of horizontally connected well groups of salt rock through visual simulation of different water injection flow rates, different stages, presence or absence of oil pads, injection-production direction, etc. Optimal production parameters and processes, obtaining mechanisms and technical means of downhole disaster prevention and control, and guiding on-site production.

Description

technical field [0001] The invention relates to the technical field of water-solubilized cavity formation control and disaster prevention and control of horizontal interconnected well groups in thin salt layers, and more specifically solves the problem of cavity shape expansion law and control of horizontal interconnected well groups in thin salt layers. Background technique [0002] Salt rock is the rock with the best density and the lowest porosity in the earth's crust, and belongs to a special chemical sedimentary rock. The main component of salt rock is NaCl, and salt resources in deep formations are often obtained through drilling and water solution mining. After the water solution mining of salt rock, a huge goaf (commonly known as a solution cavity) will be formed in the deep formation. Due to the compactness, good plasticity, and damage self-healing properties of salt rock formations, salt rock caves are often used to store oil, natural gas, and non-toxic waste. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/00G01N33/24
CPCG01N17/00G01N33/24
Inventor 唐海军陈结唐礼骅刘伟戴鑫张格
Owner CHINA PETROLEUM & CHEM CORP
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