Clastic Rock Physical Characteristics of Southern Songliao Basin Shiwu Fault Depression Layer

Zhang, Yun Feng; Zhao, Hui; Yuan, Hong Qi; Gao, Zeng Hui

doi:10.4028/www.scientific.net/amr.838-841.1311

“…Some physical and mechanical properties of rock depend on geological characteristics, which causes the rock to show inhomogeneity, discontinuity and anisotropy (Douma et al 2017;Vikram et al 2012). There are many studies on the geological characteristics of rocks worldwide, mainly focusing on petrography, petrochemistry, structure, physical mechanics, hydrogeology and other characteristics (Zhang et al 2013;Ulyasheva et al 2016;Marques et al 2017;Menningen et al 2018;Vonto et al 2020;Bai et al 2020). Many scholars have been searching for potential relationships between certain geological characteristics and rock mechanical properties (Chatterjee et al 2002;Tamrakar et al 2007;Sousa et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Engineering geological and petrological characterization of paleoweathered rock in the K1/J2 contact zone in the Ordos Basin, China

Zhu

¹

,

Wang

²

,

Hu

³

2022

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Various geological processes (mineral composition, structure, tectonics and weathering, etc.) affect the physical-mechanical properties of rock. Petrological and engineering geological characteristics of paleoweathered rock (PWR) from the K1/J2 contact zone are described in detail via field investigation and experimental testing. This PWR exhibits mainly sandy grains and mud structures, layered and massive strata, and calcareous and argillaceous cements; fissures are developed and often filled with argillaceous and detrital materials; 9 minerals and 7 oxides are present, and quartz is present in each sample. Long-term weathering results in a consistent bulk density and high porosity due to the transformation of primary minerals into secondary clay minerals, forming PWR that undergoes argillization in water. The axial point load strength (PLS) is the largest among the tested PLSs, followed by the diametral PLS, and the irregular PLS. The uniaxial compressive strength (UCS) varies widely, but the results are reliable. The mineralogical, physical and mechanical properties of the PWR are compared to predict one parameter from another and study their mutual influence. The PLS and UCS of the PWR are negatively correlated with the elastic mineral group (EMG) content, weathering alteration indexes, water content, and total porosity and positively correlated with the quartz content, brittle mineral group (BMG) content, bulk density, real density, and longitudinal wave velocity. The UCS and the PLS, axial (diametral) PLS and irregular PLS are positively correlated. These results provide a theoretical basis for physical and mechanical property prediction of PWR masses and rapid estimation of UCS in engineering.

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“…Yan Hai summarized the three main parameters terrestrial of source rock evaluation, that the abundance of organic matter, organic matter type and maturity of organic matter, and the various parameters has it's applicable scope [5]. Yuting Zhao had a comprehensive study in geologic history, thermal history and organic geochemistry, proposed standards to identify effective source rocks of Fulongquan rift in southern Songliao Basin [6]. LI Jun analyze the evolution of source rocks in deep southern Songliao Basin and hydrocarbon timeliness, locate two of the most suitable mold for gas accumulation in the area [7].…”

Section: Introductionmentioning

confidence: 99%

The Logging Evaluation of the Relationship between Source Rock and Oil Layer Distribution in Southern Songliao Basin

Xiu

¹

,

Pan

²

,

Xiu

³

2014

AMR

0

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At present, Most of the studies on source rocks is above the effective source rock identification and quality evaluation. But the spatial distribution of the high quality source rocks do not necessarily reflect the position of the layer. So, logging evaluation of the relationship between source rock and layer distributed in a region is necessary. In this paper 70 cores have selected from 4 wells in the first period of Qingshankou (q1), Songliao Basin, then get the experimental TOC value after core analysis. On the basis of source rock geochemical analysis, the author estimated the source rock TOC value with the ∆lgR method. As the distribution of high quality source rocks are clarified,the author draw a conclusion by researching on the relationship between the distribution of source rocks and layers which based on the "Source Control Theory" theory. Finally, it is found that the quality of the source rocks and layer distribution match well in both horizontal and vertical in this paper. This discovery is important for layer prediction and researches.

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Engineering Geological and Petrological Characterization of Paleoweathered Rock in The K1/j2 Contact Zone in the Ordos Basin, China

Zhu

¹

,

Wang

²

,

Hu

³

2021

Preprint

0

View full text Add to dashboard Cite

Various geological processes (mineral composition, structure, tectonics and weathering, etc.) affect the physical-mechanical properties of rock. Petrological and engineering geological characteristics of paleoweathered rock (PWR) from the K1/J2 contact zone are described in detail via field investigation and experimental testing. This PWR exhibits mainly sandy grains and mud structures, layered and massive strata, and calcareous and argillaceous cements; fissures are developed and often filled with argillaceous and detrital materials; 9 minerals and 7 oxides are present, and quartz is present in each sample. Long-term weathering results in a consistent bulk density and high porosity due to the transformation of primary minerals into secondary clay minerals, forming PWR that undergoes argillization in water. The axial point load strength (PLS) is the largest among the tested PLSs, followed by the diametral PLS, and the irregular PLS. The uniaxial compressive strength (UCS) varies widely, but the results are reliable. The mineralogical, physical and mechanical properties of the PWR are compared to predict one parameter from another and study their mutual influence. The PLS and UCS of the PWR are negatively correlated with the elastic mineral group (EMG) content, weathering alteration indexes, water content, and total porosity and positively correlated with the quartz content, brittle mineral group (BMG) content, bulk density, real density, and longitudinal wave velocity. The UCS and the PLS, axial (diametral) PLS and irregular PLS are positively correlated. These results provide a theoretical basis for physical and mechanical property prediction of PWR masses and rapid estimation of UCS in engineering.

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Clastic Rock Physical Characteristics of Southern Songliao Basin Shiwu Fault Depression Layer

Cited by 3 publications

References 4 publications

Engineering geological and petrological characterization of paleoweathered rock in the K1/J2 contact zone in the Ordos Basin, China

Engineering geological and petrological characterization of paleoweathered rock in the K1/J2 contact zone in the Ordos Basin, China

The Logging Evaluation of the Relationship between Source Rock and Oil Layer Distribution in Southern Songliao Basin

Engineering Geological and Petrological Characterization of Paleoweathered Rock in The K1/j2 Contact Zone in the Ordos Basin, China

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