Fault-sealing capability and its impact on coalbed methane distribution in the Zhengzhuang field, southern Qinshui Basin, North China

Wang, Hui; Yao, Yanbin; Liu, Dameng; Pan, Zhejun; Yang, Yanhui; Cai, Yidong

doi:10.1016/j.jngse.2015.12.036

Cited by 48 publications

(33 citation statements)

References 23 publications

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“…In general, fractures can be divided into tectonic fractures and non-tectonic fractures (Jiu et al, 2013a;Wang et al, 2016b), and tectonic fractures can be further subdivided into shear and tensile fractures, which account for 85% and 15% based on the statistics, respectively, in the study area. Based on the fracture dip angle, tectonic fractures can be divided into horizontal (0-20 degrees), low-angle (20-50 degrees), high-angle (50-70 degrees) and vertical fractures (70-90 degrees; Ju Wei et al, 2013b, 2014a.…”

Section: Tectonicsmentioning

confidence: 99%

“…(1) The conjugate joints indicated an N-S maximum principal stress field ( Fig. 6a), which is a product of the Indosinian movement (Wang et al, 2013;Wang et al, 2016b). In this stage, folds with ~E-W direction (e.g., the Panjiazhuang syncline) were developed (Li Lei et al, 2014).…”

Section: Tectonicsmentioning

confidence: 99%

“…Based on the phenomena of outcrop and the characteristics of conjugate joints and fault striation, tectonic fractures with NNW-SSE and NNE-SSW directions were formed during the Indosinian period (Wang et al, 2013;Li Lei et al, 2014;Cai et al, 2016;Wang et al, 2016b), tectonic fractures with NW-SE and ~E-W directions were formed during the Yanshanian period (Liu Huanjie et al, 1998, Liu Chao et al, 2011Liu et al, 2016;Zhao et al, 2016), and tectonic fractures with NE-SW and NEE-SWW directions were formed during the Himalayan period in the study area (Wu Caifang et al, 2005;Zhao et al, 2016;Chen et al, 2016).…”

Section: Tectonicsmentioning

confidence: 99%

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Simulation of Paleotectonic Stress Fields and Distribution Prediction of Tectonic Fractures at the Hudi Coal Mine, Qinshui Basin

Fang

Sang

Wang

et al. 2017

Acta Geologica Sinica (Eng)

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Study on tectonic fractures based on the inversion of tectonic stress fields is an effective method. In this study, a geological model was set up based on geological data from the Hudi Coal Mine, Qinshui Basin, a mechanical model was established under the condition of rock mechanics and geostress, and the finite element method was used to simulate the paleotectonic stress field. Based on the Griffith and Mohr‐Coulomb criterion, the distribution of tectonic fractures in the Shanxi Formation during the Indosinian, Yanshanian, and Himalayan period can be predicted with the index of comprehensive rupture rate. The results show that the acting force of the Pacific Plate and the India Plate to the North China Plate formed the direction of principal stress is N‐S, NW ‐ SE, and NE ‐ SW, respectively, in different periods in the study area. Changes in the direction and strength of the acting force led to the regional gradients of tectonic stress magnitude, which resulted in an asymmetrical distribution state of the stress conditions in different periods. It is suggested that the low‐stress areas are mainly located in the fault zones and extend along the direction of the fault zones. Furthermore, the high‐stress areas are located in the junction of fold belts and the binding site of multiple folds. The development of tectonic fractures was affected by the distribution of stress intensity and the tectonic position of folds and faults, which resulted in some developed areas with level I and II. There are obvious differences in the development of tectonic fractures in the fold and fault zones and the anticline and syncline structure at the same fold zones. The tectonic fractures of the Shanxi Formation during the Himalayan period are more developed than those during the Indosinian and Yanshanian period due to the superposition of the late tectonic movement to the early tectonic movement and the differences in the magnitude and direction of stress intensity.

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Section: Tectonicsmentioning

confidence: 99%

Section: Tectonicsmentioning

confidence: 99%

Section: Tectonicsmentioning

confidence: 99%

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Simulation of Paleotectonic Stress Fields and Distribution Prediction of Tectonic Fractures at the Hudi Coal Mine, Qinshui Basin

Fang

Sang

Wang

et al. 2017

Acta Geologica Sinica (Eng)

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“…At present, the commercial development of CBM has been realized in high-rank coal areas of southern Qinshui basin and eastern Ordos basin [1] [2]. While, the exploration and development of CBM have not been developed in the low-rank coal area, in addition to some areas in the stage of commercialization of small scale.…”

Section: Introductionmentioning

confidence: 99%

Optimization Design of Fracturing Parameters for Coalbed Methane Wells in Dafosi Mine Field

Wang¹,

Ma²,

He³

et al. 2017

JPEE

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Being controlled by the gas content of the reservoir, the productivity of CBM well is also mainly determined by its engineering quality and the physical property of the reservoir. In Dafosi mine field, 22 vertical wells from the "26 + 1" CBM wells project that was implemented since 2014 showed great difference in productivity after fracturing construction. With the consistent geological condition of coal reservoirs, fracturing construction parameters are suggested as the priority factor that controlling the well productivity. In this study, being combined with historical production and geological data, an optimized designation of fracturing construction parameters was established based on systematically comparative analysis of construction parameters such as discharge, the total volume of fracturing fluid, the quality of sand, sand ratio, which provides engineering basis for further fracturing construction of CBM wells.

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“…This reserve also causes serious disasters with loss of life and personal injury around the world, and especially in mainland China due to the complexity of its reservoir conditions [1,2]. In order to exploit the coalbed methane and maintain the reservoir content while reducing coal mine disasters, determining the methane content accurately is an essential advance step [3].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Parameters Effect on the Sampling Method Based on Negative Pneumatic Conveying

Zhang¹,

Wei²,

Wang³

et al. 2016

IJHT

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The factors of pipe diameter, drilling velocity and the degree of hole collapse effects on vacuum pneumatic conveying were studied by the self-developed vacuum pneumatic conveying experimental system. The results revealed the following three facts. 1) for a certain external diameter 73mm，the best choice for the inner diameter was 36～46mm; 2) when the drilling velocity was below 0.44m/min, the total pressure drop in the system is low and the sampling time cost is moderate; 3) for reducing the particle breakage ratio during the process of vacuum pneumatic conveying for sampling with a 50m distance, the roots vacuum pump with a pressure range above 40kPa and air flow rate of about1000πD 2 m 3 /min was required. The above results provide a suggestion for coal sampling based on the vacuum pneumatic conveying parts selection.

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Fault-sealing capability and its impact on coalbed methane distribution in the Zhengzhuang field, southern Qinshui Basin, North China

Cited by 48 publications

References 23 publications

Simulation of Paleotectonic Stress Fields and Distribution Prediction of Tectonic Fractures at the Hudi Coal Mine, Qinshui Basin

Simulation of Paleotectonic Stress Fields and Distribution Prediction of Tectonic Fractures at the Hudi Coal Mine, Qinshui Basin

Optimization Design of Fracturing Parameters for Coalbed Methane Wells in Dafosi Mine Field

Experimental Study on the Parameters Effect on the Sampling Method Based on Negative Pneumatic Conveying

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