... of diverse reservoir types, fluid dynamics, and other natural factors on the reservoir framework was assessed using fluid inclusion, microthermometry, laser Raman spectroscopy, and thermodynamic modeling. The Wufeng-Longmaxi shale reservoir in the study area shows high variability in hydraulic fracturing...

... and the main controlling factors of Longmaxi shale. In addition, we established the fracturability index of shale based on the brittleness index, critical strain energy release rate, and fracture toughness. The results indicate that the brittle mineral content of Longmaxi shale in the Fenggang block is between...

...Yang Gu; Jianhua He; Sheng Xu; Qianning Tian; Wei Zhang; Shuai Yin Abstract Southern China is affected by multi-stage tectonic activities, with strong fold deformation, complex fault systems and poor shale gas preservation conditions. Here, we used shale samples from the lower Silurian Longmaxi...

...Lei Chen; Zhenxue Jiang; Keyu Liu; Pengfei Wang; Yu Liu; He Bi; Fenglin Gao; Chen Zhang; Wenming Ji Abstract We have used focused ion beam-helium ion microscopy and low-pressure N 2 adsorption to investigate the pore characteristics of Lower Silurian Longmaxi shale. These results, combined...

...Yijun Zheng; Yuhong Liao; Yunpeng Wang; Yongqiang Xiong; Ping’an Peng ABSTRACT Changning and Fuling are two of the best-known shale gas fields in China, located at two different depositional centers of the Upper Ordovician Wufeng Formation to the lower Silurian Longmaxi Formation in the Sichuan...

... apparatus and process in this work. The test shale samples were taken from the Longmaxi Formation, Chongqing, Southwest of China. The density of the shale sample is 2600 kg/m 3 . The size of the sample is standard which is 25 mm in diameter and 50 mm in length. The unevenness of both ends of the test piece...

...Boling Pu; Dazhong Dong; Xinjun Ning; Shufang Wang; Yuman Wang; Shaoke Feng Abstract Producers have always been eager to know the reasons for the difference in the production of different shale gas wells. The Southern Sichuan Basin in China is one of the main production zones of Longmaxi shale gas...

... for subsurface applications. We have measured fracture mechanical properties of Longmaxi shale outcrop samples in the Sichuan Basin, China, under different environments of ambient air, deionized water, saline fluids of NaCl and KCl at 0.5 M concentration, and acidic HCl fluid at pH of 5. All aqueous fluids...

.... The Wufeng–Longmaxi shale in the Fuling gas field, China, was investigated via bulk analysis and scanning electron microscopy to reveal the influence of tectonic exhumation on the porosity of OM-rich shale. Thermal maturity and organic and mineralogical compositions are regionally homogeneous in the Fuling...

...Yadong Zhang; Reza Rezaee; Tobias M. Müller; Guangjie Zheng; Jimmy X. Li; Yu Fan; Bo Zeng; Xiaojin Zhou Abstract We have predicted the flow permeability and its spatial distribution for the Longmaxi shale gas reservoir using microseismicity induced during hydraulic-fracturing stimulation...

... ). It converts a regular amplitude volume into a facies classification volume to discriminate depositional facies elements. The resulting facies maps on sequential horizons through the Lower Paleozoic, including the Longmaxi Shale and the Longmaxi Sand, are instrumental in unraveling fracture and depositional...

...Chao Liang; Zaixing Jiang; Yingchang Cao; Minghao Wu; Ling Guo; Chunming Zhang ABSTRACT The purpose of this work was to study the depositional mechanisms and significance of the Longmaxi shale in the Sichuan Basin in southern China. Seven lithofacies were identified based on the detailed...

... desorption gas and the relationship to reservoir properties and shale compositions are not systematically studied from the actual production situation. In this study, 63 core shales of Wufeng-Longmaxi formation from the YY1 well in the eastern Sichuan Basin were subjected to TOC (total organic carbon), solid...

...Yijun Zheng; Yuhong Liao; Yunpeng Wang; Yongqiang Xiong; Ping’an Peng ABSTRACT Thick marine shales occur in the Wufeng Formation and Longmaxi Formation of Sanquan Town of the Nanchuan District, Chongqing Municipality, which is located on the southeast margin of the Sichuan Basin. However, few...

...Qiyang Gou; Shang Xu; Fang Hao; Yangbo Lu; Zhiguo Shu; Yongchao Lu; Zhengkai Wang; Yufan Wang Abstract The Wufeng-Longmaxi shales and the Niutitang shales are the most important organic-rich marine shales in southern China. To fully understand the significant difference in drilling results between...

... fragmentation efficiency. Through a three-point bending test of notched semicircular specimens of Longmaxi shale, the coupled relationship of mode-I fracture toughness (Kic), peak fracture force ( P max ), energy release rate ( G I ), applied work ( W ), and loading rate was studied by using kernel density...

...Zhensheng Shi; Tianqi Zhou; Ling Qi Abstract The characteristics and formation of maximum flooding (MF) black shales are important aspects in defining the geology of fine-grained reservoirs. The MF black shales are located at the bottom of the Longmaxi Formation on the Upper Yangtze Platform...

... on the outcrops, drilling cores, geochemical tests, thin section, and other experiments, the development characteristics of the Wufeng-Longmaxi shale in the Luzhou block, Southern China, are statistically analyzed, and the controlling factors (e.g., tectonic factors, organic matter, mineral components, mechanical...

...Zhiye Gao; Yupeng Fan; Qinhong Hu; Zhenxue Jiang; Yu Cheng ABSTRACT The lower Silurian Longmaxi Formation shale in the Sichuan Basin is one of the most promising shale gas plays in China. Pore structure has a significant impact on hydrocarbon migration within shales. This study conducts systematic...

...Ruyue Wang; Zongquan Hu; Chuanxiang Sun; Zhongbao Liu; Chenchen Zhang; Bo Gao; Wei Du; Jianhua Zhao; Wenhao Tang Abstract A systematic comparative analysis of shale reservoir characteristics of the Wufeng-Longmaxi (O 3 w -S 1 l ) and Niutitang (Є 1 n ) Formations in southeastern Sichuan Basin...