Pores in coal are not only the main space for coalbed methane (CBM) occurrence but also to be opened during CBM recovery. Therefore, analysis of impact hydraulic fracturing on pores, especially change adsorption pores before and after fracturing, is great significance evaluation effect Hydraulic experiments low-field nuclear magnetic resonance technology were used analyze changes T 2 curve, por...

Abstract Despite the significant progress made in coalbed methane (CBM) exploration and development recent years, understanding of CBM enrichment mechanisms remains limited. This study aims to elucidate mechanism southern Qinshui Basin, China, by analyzing characteristics global basins building a geological model area. Field analyses are conducted predict sweet spots high abundance production p...

Hydraulic fracturing is an important technical measure for coalbed methane (CBM) development, and the propagation of fractures in target coal seam induced by hydraulic related to stimulation performance CBM recovery. Therefore, effective monitoring fracture development during reservoir critical engineering. In this paper, microseismic technology was used monitor spatial temporal characteristics...

Geological structures of Sima coal mine in Shanxi Province were analyzed to understand the control effect geological on occurrence coalbed methane (CBM) seam #3 mine. The CBM contents districts #2 and tested, effects buried depth, fault collapse column distribution content are studied. research results showed that: 1) average has a linear relationship with depth overburden thickness, but smalls...

In most mining areas of China, coal seams are characterized by low gas pressure, poor permeability, and high adsorption capacity, all which have brought considerable difficulties to seam coalbed methane (CBM) extraction. According the multiyear scientific research production practice is migrated in quantity only after body directly mined, surrounding rocks deform fracture under influence. Thus,...

The coalbed methane (CBM) resource in the southern Qinshui Basin, North China, is abundant. Proper understanding of geological control factors on CBM enrichment Anze Block Basin critical to design efficient development plan this area. Field and laboratory data including well logging, testing, hydraulic fracturing, groundwater chemical analysis were used evaluate characteristics hydrodynamic geo...

The selection of seismic attributes is a key process in reservoir prediction because the prediction accuracy relies on the reliability and credibility of the seismic attributes. However, effective selection method for useful seismic attributes is still a challenge. This paper presents a novel selection method of seismic attributes for reservoir prediction based on the gray relational degree (GR...

Power ultrasonic-assisted reservoir modification is a promising technique for enhanced coalbed methane recovery. However, the in-site performance of ultrasound-assisted CBM production has not yet been revealed. In current study, in situ antireflection test was conducted with high-power ultrasound ~18 kW underground coal seam, and investigated by measuring borehole drainage gas data field zone, ...