Pressure Boosting Effect in Perforation Cavity During Supercritical Carbon Dioxide Jet Fracturing

Wang, Haizhu; Cheng, Yuxiong; Li, Gensheng; Shen, Zhonghou; Tian, Shouceng; Fan, Xiaomeng

doi:10.1615/atomizspr.2013007403

Cited by 20 publications

(5 citation statements)

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“…fracturing in the down-hole environment. Most of the current researches are mainly based on theoretical research [11][12][13], the necessary means of experimental research is relatively scarce. Akihisa Kizaki [14] has developed an experimental system for supercritical CO 2 fracturing, but it cannot study the impact of supercritical CO 2 temperature on rock fracturing, and cannot conduct a variety of fluids fracturing experiments.…”

Section: Jinst 13 P03017mentioning

confidence: 99%

Design of experimental system for supercritical CO₂ fracturing under confining pressure conditions

Wang

Lü

et al. 2018

J. Inst.

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Supercritical CO 2 has the characteristics of low viscosity, high diffusion and zero surface tension, and it is considered as a new fluid for non-polluting and non-aqueous fracturing which can be used for shale gas development. Fracturing refers to a method of utilizing the high-pressure fluid to generate fractures in the rock formation so as to improve the oil and gas flow conditions and increase the oil and gas production. In this article, a new type of experimental system for supercritical CO 2 fracturing under confining pressure conditions is designed, which is based on characteristics of supercritical CO 2 , shale reservoir and down-hole environment. The experimental system consists of three sub-systems, including supercritical CO 2 generation system, supercritical CO 2 fracturing system and data analysis system. It can be used to simulate supercritical CO 2 fracturing under geo-stress conditions, thus to study the rock initiation pressure, the formation of the rock fractures, fractured surface morphology and so on. The experimental system has successfully carried out a series of supercritical CO 2 fracturing experiments. The experimental results confirm the feasibility of the experimental system and the high efficiency of supercritical CO 2 in fracturing tight rocks. K: Overall mechanics design (support structures and materials, vibration analysis etc); Manufacturing 1Corresponding author.

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Section: Jinst 13 P03017mentioning

confidence: 99%

Design of experimental system for supercritical CO₂ fracturing under confining pressure conditions

Wang

Lü

et al. 2018

J. Inst.

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“…In each solving iteration loop, the mass conservation and momentum equations were solved in a coupled fashion at first, and then the energy and turbulent flow equations were solved (Guardo et al., 2006). In this case, the values of pressure, temperature and velocity on each node of the flow domain were obtained (Cheng et al., 2013). Before the convergence was checked, nitrogen properties on each compute node are updated based on the REFPROP v7.0 database.…”

Section: Establishment and Solution Of Cfd Modelmentioning

confidence: 99%

Numerical simulation on the flow field characteristics and impact capability of liquid nitrogen jet

Cai

Gao

Huang

2017

Energy Exploration & Exploitation

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With the rapid progress of petroleum engineering, liquid nitrogen jet is expected to be used for perforation and jet fracturing, and then provide a new method for unconventional reservoirs efficient development. In order to research the flow field characteristics and evaluate the impact capability of liquid nitrogen jet, a computation fluid dynamic model was built by coupling the nitrogen physical property equations to simulate the flow field of liquid nitrogen jet. The results indicated that given the same simulation conditions, the impact pressure of liquid nitrogen jet was equivalent to that of water jet. The liquid nitrogen jet presented more excellent impact capability than water jet because of its higher axial and radial velocities. The impact capability of liquid nitrogen jet increased with the growth of nozzle pressure drop and nozzle diameter, decreased with the increasing of standoff distance, and was slightly influenced by fluid temperature. The confining pressure hardly affected the impact capability of liquid nitrogen jet, so it can be neglected in the engineering application. This study uncovered the flow field characteristics of liquid nitrogen jet and could provide theoretical guidance for the application of perforation and fracturing with liquid nitrogen jet.

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“…Hydraulic fracturing technology is an important means of extracting unconventional oil and gas reservoirs worldwide [10], but it also faces many problems such as high consumption of water resources, environmental pollution, and clay expansion [11][12][13]. In the study of anhydrous fracturing, Cheng et al [14] simulated the flow field in the perforation tunnel during supercritical CO 2 jet fracturing and concluded that supercritical CO 2 jet fracturing has a stronger perforation tunnel pressurization effect than hydraulic jet fracturing under the same conditions. Li et al [15] established a thermal-fluid-solid coupling rock stress calculation model based on the synergistic rock breaking mechanism of supercritical CO 2 jet pressure and temperature difference.…”

Section: Introductionmentioning

confidence: 99%

Complex Flow Mechanism and Pressurization Effect of Liquid Nitrogen Jet Fracturing Formation Perforation Tunnel

Zou,

Cai,

Wang

et al. 2023

Processes

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As an anhydrous fracturing method, liquid nitrogen jet fracturing technology is expected to become an efficient development method for shale gas resources. In order to explore the influence of the pressurization effect in the liquid nitrogen jet channel, the flow field in the perforation tunnel during the liquid nitrogen jet fracturing process was simulated by computational fluid dynamics, and the complex flow mechanism of liquid nitrogen in the perforation tunnel was analyzed. The pressurization effect of liquid nitrogen jet and water jet fracturing was compared, and the influence of various parameters on the pressurization effect of liquid nitrogen jet fracturing was studied. The research results indicate that under the same conditions, liquid nitrogen jets have a pressurization effect comparable to water jets, and the difference between the pressurization values of the liquid nitrogen jet and the water jet in the perforation tunnel is not more than 0.4 MPa under different nozzle pressure drop conditions. The larger the nozzle pressure drop and nozzle diameter, the greater the pressure increase value in the perforation tunnel of liquid nitrogen jet fracturing, which decreases with the increase in casing hole diameter. Further analysis shows that the pressurization effect is most affected by the two parameters of casing hole diameter and nozzle diameter. The essential reason for its influence on the pressurization value is the squeezing effect of the jet on the perforation tunnel fluid and the sealing effect of the shrinking part of the perforation tunnel on the backflow. The ambient pressure, the temperature of liquid nitrogen, and the diameter of the wellbore have no obvious effect on the pressurization effect. Therefore, through the reasonable combination of casing hole diameter and nozzle diameter, the sealing effect of the contraction part of the perforation tunnel on the fluid and the squeezing effect on the fluid in the perforation tunnel will be affected, which will significantly improve the pressurization effect of the liquid nitrogen jet in the perforation tunnel.

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Pressure Boosting Effect in Perforation Cavity During Supercritical Carbon Dioxide Jet Fracturing

Cited by 20 publications

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Design of experimental system for supercritical CO₂ fracturing under confining pressure conditions

Design of experimental system for supercritical CO₂ fracturing under confining pressure conditions

Numerical simulation on the flow field characteristics and impact capability of liquid nitrogen jet

Complex Flow Mechanism and Pressurization Effect of Liquid Nitrogen Jet Fracturing Formation Perforation Tunnel

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Pressure Boosting Effect in Perforation Cavity During Supercritical Carbon Dioxide Jet Fracturing

Cited by 20 publications

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Design of experimental system for supercritical CO2 fracturing under confining pressure conditions

Design of experimental system for supercritical CO2 fracturing under confining pressure conditions

Numerical simulation on the flow field characteristics and impact capability of liquid nitrogen jet

Complex Flow Mechanism and Pressurization Effect of Liquid Nitrogen Jet Fracturing Formation Perforation Tunnel

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Design of experimental system for supercritical CO₂ fracturing under confining pressure conditions

Design of experimental system for supercritical CO₂ fracturing under confining pressure conditions