Horizontal well supercritical co 2 Fracturing Test System
A fracturing test and variable size technology, which is applied in the direction of wellbore/well components, production fluid, earthwork drilling and production, etc., to achieve the effects of cost saving, convenient operation and simple structure
Active Publication Date: 2019-12-03
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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Problems solved by technology
[0005] Aiming at the bottleneck of unconventional oil and gas exploitation in my country, the present invention designs a supercritical CO 2 The fracturing test system solves the limitations of the existing three-way testing machine on the size of the sample, and realizes the anhydrous fracturing process of rocks and artificial test pieces indoors, and masters the injection, temperature and displacement of supercritical carbon dioxide. Provide a test platform for studying the evolution mechanism of fracturing fractures
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[0022] The present invention will be described in further detail below through specific implementation examples and in conjunction with the accompanying drawings.
[0023] Such as Figure 1-Figure 5 A horizontal well supercritical CO 2 Fracturing test systems, including CO 2 It consists of four parts: phase conversion device, three-way pressure chamber, variable-size three-way loading system, acoustic emission monitoring and acquisition system, and control system. 2 The phase transition device communicates with the three-way pressure chamber through pipes. The variable-size three-way loading system is installed in the three-way pressure chamber. An acoustic emission probe is also installed in the three-way pressure chamber. The acoustic emission probe communicates with the control system through the acoustic emission monitoring and acquisition system. connection; the CO 2 The phase transition device includes CO 2 Gas source 1 and pressure control system and temperature con...
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A supercritical CO2 bursting test system of a horizontal well under the variable-size condition comprises a CO2 phase-state conversion device, a three-directional pressure chamber, a variable-size three-directional loading system, a sound emission monitoring acquisition system and a control system, wherein the CO2 phase-state conversion device is communicated with the three-directional pressure chamber through a pipe, the variable-size three-directional loading system is arranged in the three-directional pressure chamber, and a sound emission probe is also arranged in the three-directional pressure chamber and is connected with the control system through the sound emission monitoring acquisition system. The CO2 phase-state conversion device comprises a CO2 gas source, a pressure control system and a temperature control system, wherein the CO2 gas source is communicated with the three-directional pressure chamber through a pipe, and the pipe for communicating the CO2 gas source with thethree-directional pressure chamber is provided with the pressure control system and the temperature control system; a seal washer divides the three-directional pressure chamber into an upper-portiontest piece chamber and a lower-portion oil cylinder chamber; test pieces are arranged in the upper-portion test piece chamber, and the hydraulic loading system is communicated with a variable-size loading jack and the lower-portion oil cylinder chamber.
Description
technical field [0001] The invention belongs to the field of unconventional oil and gas exploitation technology and equipment, and specifically relates to a supercritical CO 2 Fracture test device. Background technique [0002] In order to maintain sustainable resources and environment and optimize energy structure, China has actively carried out large-scale development and utilization of unconventional oil and gas, especially shale gas. The industrial exploitation of shale gas requires large-scale reservoir volume fracturing, and volume fracturing requires a large amount of high-pressure water mixed with chemical additives to be injected into shale reservoirs. This construction process not only consumes a large amount of fresh water resources, but also may cause pollution of the environment. [0003] The supercritical carbon dioxide waterless fracturing technology can solve the tense situation of water resources, and prevent water-sensitive damage to formations and enviro...
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IPC IPC(8): E21B43/26E21B43/16
CPCE21B43/164E21B43/26
Inventor 王洪建陈上元赵菲于福荣董金玉袁广祥于怀昌王江锋
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER