Optimization design of hydraulic parameters for supercritical CO2 fracturing in unconventional gas reservoir

Wang, Jintang; Wang, Zhiyuan; Sun, Baojiang; Gao, Yonghai; Wang, Xin; Fu, Weiqi

doi:10.1016/j.fuel.2018.08.078

Cited by 53 publications

(14 citation statements)

References 23 publications

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“…The maximum fracture width increases by a factor of 60% as the pump rate of CO 2 increases from 3 to 7 m 3 /min, as shown in Fig. 11 (Wang et al 2019, Yushi et al 2017). High pump rates also generate a more complex fracture network that increases the stimulated reservoir volume (Hou et al 2014, Zou et al 2016.…”

Section: Mismatch Between Pump Rate and Fluid Viscositymentioning

confidence: 80%

Review of fundamental studies of CO2 fracturing: Fracture propagation, propping and permeating

Hou

Sheng

Elsworth

et al. 2021

Journal of Petroleum Science and Engineering

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Section: Mismatch Between Pump Rate and Fluid Viscositymentioning

confidence: 80%

Review of fundamental studies of CO2 fracturing: Fracture propagation, propping and permeating

Hou

Sheng

Elsworth

et al. 2021

Journal of Petroleum Science and Engineering

Self Cite

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“…Initial conditions: At the initial moment of calculation, velocities of SC-CO 2 jet and liquid CO 2 meet the following conditions given in Equation (7),…”

Section: ) Initial and Boundary Conditionsmentioning

confidence: 99%

“…Consequently, the output and recovery rate of oil or gas in single well are increased. Moreover, the use of SC-CO 2 avoids the groundwater contamination inevitably caused by traditional hydraulic fracturing [5]- [7]. Based on the above properties, SC-CO 2 is considered a very promising drilling medium.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Rock Breaking Mechanism With Supercritical Carbon Dioxide Jet by SPH-FEM Approach

Yang

2019

IEEE Access

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As a novel technology in the field of petroleum exploitation, rock breaking with supercritical carbon dioxide (SC-CO 2 ) has considerable social and economic benefits. To investigate the rock breaking mechanism under SC-CO 2 jet impacting in terms of mass and energy conservation, a fluid-solid coupling numerical model was established using smoothed particle hydrodynamics (SPH) method coupled with the finite element method (FEM). Jet movement feature and the stress distribution rule of impact target were obtained. Moreover, the space-time evolution of erosion cavity and failure process of elements were analyzed. The numerical research results are as follows: (1) the hybrid algorithm of SPH-FEM was effective for obtaining the numerical representation of rock breaking process under SC-CO 2 jet impacting, and the simulation results were in good agreement with the experimental data. (2) The asymmetrical distribution characteristics of monitored points caused the erosion cavity to deviate from the geometrical center of the target face. (3) Soft rock under SC-CO 2 jet impacting presented two failure forms: erosion and exfoliation. (4) The process of rock breaking with SC-CO 2 jet was as follows: when the jet came into contact with the target plane, the pressure stress on the mating face and shear stress on the contact edge dominated the evolution of initial compression-shear failure zone. Thereafter, the high diffusivity-driven SC-CO 2 penetrated into tiny cracks or pores near the failure zone, and strong air wedge effect caused tensile failure. With continuous high-speed impacting, the initial failure zone extended to a larger primary failure zone. Moreover, a few discrete failure zones were formed due to the high uncertainties of particles' motion trajectories, which mutually contributed to the main failure zone, and the erosion cavity was formed. When the jet became steady, quasi-static action was applied to the rock sample, and the erosion range expanded continuously.INDEX TERMS Jet impingement, numerical representation, rock fragmentation, supercritical carbon dioxide.

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“…There is a huge network of possibilities to produce value-added products from diluted and concentrated CO 2 , through of mineralization, physical, biological, and chemical processes [7]. The supercritical CO 2 is considerate a green solvent with physicochemical properties that potentiate as a swelling agent [31,32], fluid in Rankine cycles [33], fracturing fluid [34], bioactive compounds in food and pharmaceutical industry [35,36], catalytic processes [37,38], and polymer industry [39,40].…”

Section: Mitigation and Adaptation To Climate Changementioning

confidence: 99%

Technological Strategies to Mitigate the Climate Change: Current Status and Future Trends

Gil¹

2018

BJSTR

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Optimization design of hydraulic parameters for supercritical CO2 fracturing in unconventional gas reservoir

Cited by 53 publications

References 23 publications

Review of fundamental studies of CO2 fracturing: Fracture propagation, propping and permeating

Review of fundamental studies of CO2 fracturing: Fracture propagation, propping and permeating

Numerical Investigation of Rock Breaking Mechanism With Supercritical Carbon Dioxide Jet by SPH-FEM Approach

Technological Strategies to Mitigate the Climate Change: Current Status and Future Trends

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