Effects of a Nano-Silica Additive on the Rock Erosion Characteristics of a SC-CO2 Jet under Various Operating Conditions

Huang, Man; Kang, Yong; Long, Xinping; Wang, Xiaochuan; Hu, Yi; Deng, Li; Zhou, Mingxing

doi:10.3390/app7020153

Cited by 13 publications

(10 citation statements)

References 42 publications

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Section: Resultssupporting

confidence: 84%

“…This is because, with the increase of standoff distance, the diameter of the jet beam increases while the energy of the jet declines [9]. Moreover, the macroscopic appearances of eroded specimens are in good agreement with the results of rock erosion by jets in previous related articles [15,39], indicating the reliability of this experiment. It can also be observed in Figure 5 that, for the Laval nozzles, the size of the pits on the surface of the specimens are larger than that of the pits eroded by the jet discharging from the convergent nozzle at the same standoff distance, indicating that the erosion capability of the SC-CO2 jet can be enhanced by the Laval nozzles.…”

Section: Resultssupporting

confidence: 84%

“…The experiment was conducted with the use of a multifunctional SC-CO 2 jet test system developed by our research team independently, and had been used in some related research [13,15]. The red arrows illustrate the flow direction of CO 2 , while the blue ones show that of hot water.…”

Section: Facilitiesmentioning

confidence: 99%

“…To make better use of SC-CO 2 fluid in the field of oil and gas development, different kinds of technologies using SC-CO 2 fluid have been invented, like SC-CO 2 flooding, SC-CO 2 fracturing, SC-CO 2 coiled tubing drilling, SC-CO 2 jets, and so on. Among them, the SC-CO 2 jet, which can be more efficient in eroding rocks than the water jet under the same conditions, has been the subject of numerous studies [9][10][11][12][13][14][15][16][17][18]. The most attractive point of this novel jet technology is that by taking full advantage of the high diffusivity of SC-CO 2 , it can produce an effective jet with a strong ability to erode rock without using any devices for increasing the inlet pressure in the drilling systems.…”

Section: Introductionmentioning

confidence: 99%

“…Their experimental results illustrated that the rock erosion efficiency of the SC-CO 2 combined with swirling and round jets is 42.9% higher than that of the conventional water jet, and the combined jet can lead to the occurrence of rock mass breakaway. Simultaneously, to improve the erosion capacity of the SC-CO 2 jet, the influence of nano-silica additive on the rock erosion characteristics was experimentally investigated by Huang et al [15]. They found that an appropriated amount of nano-silica additive can greatly enhance the erosion ability of the jet, and the effect on the erosion capability largely depends on the operating conditions.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Nozzle Configuration on Rock Erosion Under a Supercritical Carbon Dioxide Jet at Various Pressures and Temperatures

et al. 2017

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Abstract:The supercritical carbon dioxide (SC-CO 2 ) jet offers many advantages over water jets in the field of oil and gas exploration and development. To take better advantage of the SC-CO 2 jet, effects of nozzle configuration on rock erosion characteristics were experimentally investigated with respect to the erosion volume. A convergent nozzle and two Laval nozzles, as well as artificial cores were employed in the experiments. It was found that the Laval nozzle can enhance rock erosion ability, which largely depends on the pressure and temperature conditions. The enhancement increases with rising inlet pressure. Compared with the convergent nozzle, the Laval-1 nozzle maximally enhances the erosion volume by 10%, 21.2% and 30.3% at inlet pressures of 30, 40 and 50 MPa, respectively; while the Laval-2 nozzle maximally increases the erosion volume by 32.5%, 49.2% and 60%. Moreover, the enhancement decreases with increasing ambient pressure under constant inlet pressure or constant pressure drop. The growth of fluid temperature above the critical value can increase the enhancement. In addition, the jet from the Laval-2 nozzle with a smooth inner profile always has a greater erosion ability than that from the Laval-1 nozzle.

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Section: Resultssupporting

confidence: 84%

Section: Resultssupporting

confidence: 84%

Section: Facilitiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Nozzle Configuration on Rock Erosion Under a Supercritical Carbon Dioxide Jet at Various Pressures and Temperatures

et al. 2017

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Applied techniques for residual oil recovery from source rocks: A review of current challenges and possible developments

Abdulkareem

Padmanabhan

2020

Can J Chem Eng

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Depleted fossil fuel resources have led to an investigation of other promising alternatives such as renewable and unconventional energy sources. Shale formations have limited permeability. Therefore, several extraction techniques have been applied to improve residual oil recovery and production. In this work, the techniques applied above ground to extract the organic fractions from oil/gas shale are discussed. Studies related to compositional fractionation, ultrasonic-assisted, microwave-assisted, supercritical fluids, and surface retorting techniques have been conducted systematically in approximately 150 scholarly articles over the past 10 years. The impacts of each technique as well as the drawbacks and challenges are highlighted in this paper. The fractionation techniques are sufficient in general; however, they are time consuming as they include several stages and use a considerable amount of solvents. Ultrasonic and microwave techniques are highly reliant on formation transparency linked to the organic fraction heterogeneous distribution. The surface retorting method, which is highly efficient with up to 90% recovery, for example, the Galoter and Paraho methods, is still dependent on shale particulate size, generates a massive amount of spent shale as waste, and is prominently emissive. Therefore, assessments that can be used to overcome existing drawbacks are considered. This can provide practical insight about these techniques to overcome limitations and concerns in terms of efficiency, cost, environmental issues, and reliability features. The work highlights the dominant extraction techniques for further development.

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Effect of abrasive mass flow on the abrasive acceleration and erosion rates of abrasive gas jets

et al. 2019

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Effects of a Nano-Silica Additive on the Rock Erosion Characteristics of a SC-CO2 Jet under Various Operating Conditions

Cited by 13 publications

References 42 publications

Effects of Nozzle Configuration on Rock Erosion Under a Supercritical Carbon Dioxide Jet at Various Pressures and Temperatures

Effects of Nozzle Configuration on Rock Erosion Under a Supercritical Carbon Dioxide Jet at Various Pressures and Temperatures

Applied techniques for residual oil recovery from source rocks: A review of current challenges and possible developments

Effect of abrasive mass flow on the abrasive acceleration and erosion rates of abrasive gas jets

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