Acid rock reaction single-rock-plate crack simulation device and working method thereof

A technology for simulating device and acid-rock reaction, which is applied in the direction of material inspection, soil material testing, etc. It can solve the problems that the growth rate of wormholes cannot be directly calculated, the number of experimental groups is small, and the visibility is poor, so that it is easy to disassemble and repeat Experimental, the effect of compact overall structure and strong pressure bearing capacity

Active Publication Date: 2017-01-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the core displacement experiment has certain limitations: (1) The boundary effect is strongly influenced
[0005] At present, the country has gradually begun to use flat plate experiments to simulate formation acidification construction. There are two types of flat plate devices. One is the rock plate disclosed in the above-mentioned Chinese patent document CN104407103B. The size of the rock plate is small, only 64.5cm 2 , the influence of the boundary effect has been weakened to a certain extent, but basically it can only be used to test the conductivity. The hole growth cannot be directly observed; the rock plate used in the other flat plate model has a larger size, which reduces the probability of the wormhole breaking through to the side edge and solves the boundary effect. At the same t

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  • Acid rock reaction single-rock-plate crack simulation device and working method thereof
  • Acid rock reaction single-rock-plate crack simulation device and working method thereof
  • Acid rock reaction single-rock-plate crack simulation device and working method thereof

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Example Embodiment

[0046] Example 1

[0047] An acid rock reaction single rock slab crack simulation device, such as figure 1 As shown, including injection system, preheating system, inlet detection system, visual flat model 7, outlet detection system, condenser 16, back pressure system, waste liquid recovery system and data processing system 19; injection system, preheating system, The inlet detection system, the visual flat model, the outlet detection system 7, the back pressure system, the condenser 16, and the waste liquid recovery system are connected in sequence;

[0048] The injection system provides injection power for the single rock slab crack simulation device and adjusts the rate of acid injection; the inlet detection system is used to collect the pressure, temperature, and flow rate of the fluid at the inlet of the visible flat model 7; the preheating system will inject the acid The liquid is preheated to the required temperature of the experiment; the visual plate model 7 is used to dyn...

Example Embodiment

[0065] Example 2

[0066] The working method of the acid rock reaction single rock slab crack simulation device described in embodiment 1, the specific steps include:

[0067] (1) Select stratum rock, namely carbonate rock, process stratum rock into diagenetic slab 27, install it into the fractured plate corrosion holder, connect the acid rock reaction single slab crack simulation device, and open the data processing system 19;

[0068] (2) Open the gas vent valve 18, adjust the pressure balance in the acid rock reaction single rock slab crack simulation device, and close the gas vent valve 18;

[0069] (3) Configure the acid solution with a mass concentration of 18% and pour it into the intermediate container 1; turn on the preheating coil 3 and adjust the temperature to 70°C; turn on the back pressure system and set the back pressure of 4Mpa; turn on the inlet flowmeter 4 , Inlet pressure sensor 5, inlet temperature detector 6, outlet flow meter 10, outlet pressure sensor 8, outlet ...

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Abstract

The invention relates to an acid rock reaction single-rock-plate crack simulation device and a working method thereof. The core portion of the acid rock reaction single-rock-plate crack simulation device is a visual slab model, the visual slab model comprises a joint plate corrosion clamp holder, a support, a microscope, a rotating device and the like. The invention further provides the working method of the acid rock reaction single-rock-plate crack simulation device. The acid rock reaction single-rock-plate crack simulation device is compact in whole structure, has strong pressure bearing capability, can achieve simulation of the crack acidification situations of different stratigraphic dips (0-90 degrees) through the rotating device and can achieve dynamic observation of earthworm hole growth and extension situations and earthworm hole competition situations.

Description

technical field [0001] The invention relates to an acid-rock reaction single rock slab crack simulation device and a working method thereof, and belongs to the technical field of production increase measures of oil and gas reservoirs. Background technique [0002] Acidizing, as the main technical measure for developing low-porosity and low-permeability carbonate reservoirs, can effectively remove the pollution and clogging of the reservoir near the wellbore, improve the connectivity between the wellbore and the reservoir, and restore or increase oil and gas production. In acidizing, the acid etching results can be divided into surface corrosion, worm hole and uniform corrosion according to the dissolution form. Surface corrosion and uniform corrosion consume more acid and have poor conductivity; wormhole is a kind of corrosion with high conductivity. Dissolution channel, the formation of wormholes consumes less acid, and the transformation effect is good. The dissolved form...

Claims

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Application Information

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IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 齐宁李柏杨方明君田壮壮高梦斐翟恒来陈国彬
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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