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Rare Earth Element Characteristics of Shales from Wufeng-Longmaxi Formations in Deep-Buried Areas of the Northern Sichuan Basin, Southern China: Implications for Provenance, Depositional Conditions, and Paleoclimate. [PDF]

ACS Omega
Xiao B, Guo D, Li S, Xiong S, Jing Z, Feng M, Fu X, Zhao Z.   +7 more
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Investigation of Slickwater Effect on Permeability of Gas Shale from Longmaxi Formation

Energy & Fuels, 2021
Knowing of gas shale permeability reduction is vital for gas production from shale gas reservoirs stimulated by multistage hydraulic fracturing.
Zhonghua Liu, Baojun Bai, Jing Tang, Zuping Xiang, Shunpeng Zeng, Hai Qu   +5 more
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Geomechanical analysis on casing deformation in Longmaxi shale formation

Journal of Petroleum Science and Engineering, 2019
Abstract Casing deformation is the most significant problem while developing Longmaxi shale gas formation in Sichuan Basin, southwest China. In one of the operating acreages with 72 horizontal wells, 38 wells encountered casing deformation problems after several stages of hydraulic fracturing treatments.
Kai Dong, Naizhen Liu, Zhaowei Chen, Rui Huang, Jihui Ding, Geng Niu   +5 more
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Elastic parameter inversion of Longmaxi Formation shale based on the least squares method

Arabian Journal of Geosciences, 2021
Elastic parameters are important parameters in the study of shale anisotropy, exploration, and development, and their accuracy is of great significance. In this study, shale in the lower Silurian Longmaxi Formation of southeastern Chongqing was investigated by obtaining the acoustic velocity of the partial bedding angle through an acoustic transmission
Kepan Gao, Xiangjun Liu, Jian Xiong, Lixi Liang   +3 more
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Study on Anisotropy Affection Factors of Longmaxi Formation Shale

78th EAGE Conference and Exhibition 2016, 2016
Summary The Silurian Longmaxi Formation shale in Sichuan Basin is an important shale gas reservoir for shale gas exploration in China, but the anisotropy of Longmaxi shale is not studied sufficiently. In this case, the velocity anisotropy is examined under the reservoir pressure conditions by ultrasonic testing method.
F. Zhou, W.H. Liu, X. Xi
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Research on Brittleness of Shale in Longmaxi Formation, the Southeastern Chongqing Area

2013 International Conference on Computational and Information Sciences, 2013
This article studies Longmaxi exposures in southeast of Chongqing, and carries on experiments to analyze the feasibility of the fracturing from the aspect of brittleness. The results show that the shale is well bedded, tight, and has low porosity and low permeability in this area. And it needs to be reconstructed. The analysis of the mineral components
Chen Qiao, Liu Hong, Wang Li-sha, Wang Sen, Fan Xiao-wen, Wang Qi-jun   +5 more
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Shale geological features of Qiujiahe (Є1q) and Longmaxi (S1ln) Formation

2015
The main purpose of this research paper is to compare Qiujiahe Formation (Є1q) and Longmaxi Formation (S1ln) in north Sichuan basin where shale gas exploration has not been fully researched, and hence represents the possibility of shale gas concentration under the complex geological conditions. Based on valid laboratorial analysis, there are optimistic
Du Yu, J., Chuan Zhang, J.
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Experimental investigation of the stress-dependent permeability in the Longmaxi Formation shale

Journal of Petroleum Science and Engineering, 2019
Abstract Understanding the stress sensitivity mechanism of the matrix permeability in shale is crucial for reservoir evaluation and gas production forecasting. However, the shale matrix has a heterogeneous pore structure and a complex material composition.
Xiaoqi Wang, Yanming Zhu, Changqing Fu
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Controls on matrix permeability of shale samples from Longmaxi and Niutitang formations, China

Journal of Natural Gas Science and Engineering, 2016
Abstract The Lower Silurian Longmaxi shale and the Lower Cambrian Niutitang shale are typical marine shales in China, promising for shale gas production, whereas the gas production from these two formations vary considerably because of the different flow properties determined by geology and lithology conditions.
Hongyan Qu, Zhejun Pan, Yan Peng, Fujian Zhou   +3 more
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Chemical Compositions and Distribution Characteristics of Cements in Longmaxi Formation Shales, Southwest China

Journal of Earth Science, 2019
Shale gas resources have been regarded as a viable energy source, and it is of great significance to characterize the shale composition of different cements, such as quartz and dolomite. In this research, chemical analysis and the multifractal method have been used to study the mineral compositions and petrophysical structures of cements in shale ...
Wenda Zhou, Shuyun Xie, Zhengyu Bao, Emmanuel John M. Carranza, Lei Lei, Zhenzhen Ma   +5 more
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