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Large-size salt horizontal connected well group solution cavity building simulation experiment method

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

Active Publication Date: 2019-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Large-size salt horizontal connected well group solution cavity building simulation experiment method
  • Large-size salt horizontal connected well group solution cavity building simulation experiment method
  • Large-size salt horizontal connected well group solution cavity building simulation experiment method

Examples

Experimental program
Comparison scheme
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

The invention discloses a large-size salt horizontal connected well group solution cavity building simulation experiment method and relates to the technical field of cavity form extension law and control for regional cavity building on thin salt beds and downhole disaster prevention and control. According to the method disclosed by the invention, by virtue of visual simulation of different water injection flows, different stages, oil pad existence or not, injection recovery direction and other conditions in practical engineering and solution cavity form development laws, the cavity form controlled optimum production parameters and processes in the rock salt horizontal connected well group solution cavity building process can be obtained, the downhole disaster prevention and control mechanism and technological means are obtained, and site production is guided.

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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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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