A rock physics model for estimating elastic properties of upper Ordovician-lower Silurian mudrocks in the Sichuan Basin, China

Li, Guoliang; Li, Guanfang; Wang, Yingzhu; Shen, Qi; Yang, Jijin

doi:10.1016/j.enggeo.2019.105460

Cited by 17 publications

(4 citation statements)

References 43 publications

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“…Reliable AMA technologies include Advanced Mineral Identification and Characterization System (AMICS) from Bruker (https://www.bruker.com/en/products-and-solutions/elementalanalyzers/eds-wds-ebsd-SEM-Micro-XRF/software-amics-automated-mineralogy-system. html, accessed on 22 November 2021), Quantitative Evaluation of Materials by Scanning Microscopy (QEMSCAN) from FEI, TESCAN Integrated Mineral Analyzer (TIMA), RoqS-CAN from CGG, and Mineralogy by Artificial Intelligence Powered Scanning Electron Microscopy) (MaipSCAN) from Rock Scientific [32][33][34][35][36], all of which have helped elevate shale mineral analysis to new heights. It is worth noting that artificial intelligence technology has proven its effectiveness in the field of oil and gas engineering, and will be better used in the mineral analysis in the future [37].…”

Section: Introductionmentioning

confidence: 99%

Mineral Composition of Prospective Section of Wufeng-Longmaxi Shale in Luzhou Shale Play, Sichuan Basin

Yang

Shi

Luo³

et al. 2021

Minerals

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Currently, Luzhou in the Sichuan Basin is a focal point for shale-gas exploration and development in China. However, a lack of detailed research on the mineral composition of the Wufeng Formation-Longmaxi Formation (WF-LF) shale is hindering the extraction of deep-buried shale gas in the Luzhou shale play. Herein, a field emission scanning electron microscope (FESEM) equipped with the Advanced Mineral Identification and Characterization System (AMICS) software was employed to analyze the mineral composition of the WF-LF shale from six wells in Luzhou. Quartz was the dominant mineral type, (16.9–87.21%, average 51.33%), followed by illite, calcite, dolomite, and pyrite. Our study revealed that (1) quartz content showed a moderate positive correlation with the total organic carbon (TOC) content, indicating that the quartz found in the shale is mostly of biological origin; and (2) the sum content of siliceous minerals and carbonaceous minerals was moderately positively correlated with the brittleness index (BRIT) in well SS1H2-7 and in the well group of RS8 and RS5, indicating that the siliceous minerals and carbonaceous minerals had an active effect on reservoir compressibility. Finally, according to the mineralogical features of each sublayer, we identified four types of reservoirs to determine their scope for exploration.

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Section: Introductionmentioning

confidence: 99%

Mineral Composition of Prospective Section of Wufeng-Longmaxi Shale in Luzhou Shale Play, Sichuan Basin

Yang

Shi

Luo³

et al. 2021

Minerals

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“…With the rapid consumption of conventional energy such as petroleum, unconventional clean energy such as shale gas has become a current research focus [1][2][3][4][5]. Shale gas refers to the natural gas resources that remain in shale reservoirs in the form of adsorption and dissociation during the evolution of geological structures.…”

Section: Introductionmentioning

confidence: 99%

Study on the Damage Evolution Process and Fractal of Quartz-Filled Shale under Thermal-Mechanical Coupling

Song

et al. 2021

Geofluids

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Filling of brittle minerals such as quartz is one of the main factors affecting the initiation and propagation of reservoir fractures in shale fracturing, in order to explore the failure mode and thermal damage characteristics of quartz-filled shale under thermal-mechanical coupling. Combining the theory of damage mechanics and thermoelasticity, RFPA2D-Thermal is used to establish a numerical model that can reflect the damage evolution of shale under thermal-solid coupling, and the compression test under thermal-mechanical coupling is performed. The test results show that during the temperature loading process, there is a temperature critical value between 60°C and 75°C. When the temperature is less than the critical temperature, the test piece unit does not appear obvious damage. When the temperature is greater than the critical temperature, the specimen unit will experience obvious thermal damage, and the higher the temperature, the more serious the cracking. Under the thermal-mechanical coupling of shale, the tensile strength and elastic modulus of shale show a decreasing trend with the increase of temperature. The failure modes of shale under thermal-solid coupling can be roughly divided into three categories: “V”-shaped failure (30°C, 45°C, and 75°C), “M”-shaped failure (60°C), and inverted “λ”-shaped failure (90°C). The larger the fractal dimension, the more complex the failure mode of the specimen. The maximum fractal dimension is 1.262 when the temperature is 60°C, and the corresponding failure mode is the most complex “M” shape. The fractal dimension is between 1.071 and 1.189, and the corresponding failure mode is “V” shape. The fractal dimension is 1.231, and the corresponding failure mode is inverted “λ” shape.

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“…In practice, abandonment of the stemming leads to an increase in the consumption of explosive, number of boreholes (blast holes) and, as a consequence, cost of drilling, and lower BER [3].…”

Section: Introductionmentioning

confidence: 99%

“…-maximum release of potential energy [3,4,5], prevention of energy loss during detonation and its completeness; -higher initial gas pressure, as well as bigger effective length of the blast wave, which determines the value of the line of least resistance (LLR) according to the theory of rock destruction by a reflected wave [6]; -greater piston action of the explosion products (EP) on the walls of the explosive cavity and length of the radial cracks formed during the explosion.…”

Section: Introductionmentioning

confidence: 99%

Influence of the nature of the outflow of explosion products from blast holes and boreholes on the efficiency of rock destruction

2020

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A rock physics model for estimating elastic properties of upper Ordovician-lower Silurian mudrocks in the Sichuan Basin, China

Cited by 17 publications

References 43 publications

Mineral Composition of Prospective Section of Wufeng-Longmaxi Shale in Luzhou Shale Play, Sichuan Basin

Mineral Composition of Prospective Section of Wufeng-Longmaxi Shale in Luzhou Shale Play, Sichuan Basin

Study on the Damage Evolution Process and Fractal of Quartz-Filled Shale under Thermal-Mechanical Coupling

Influence of the nature of the outflow of explosion products from blast holes and boreholes on the efficiency of rock destruction

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