Titlebook: Coalbed Methane in China; Geological Theory an Yan Song,Xinmin Zhang,Shaobo Liu Book 2021 Springer Nature Singapore Pte Ltd. 2021 Unconvent

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项目

Characterization and Controlling Factors of CBM Reservoirs,ores can be divided into macropores (>1000 nm), mesopores (100 to 1000 nm), small pores (10 to 100 nm) and micropores (<10 nm). Gas penetrates by laminar flow and turbulent flow in the macropores, and exists by means of capillary condensation, physical adsorption and diffusion in the micropores.

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Coal Absorption Characteristics and Model Under Reservoir Conditions,orphic environment, composition, ash yield, moisture, reservoir pressure and temperature. Under similar metamorphism and sedimentary conditions, coal rock composition, ash yield, moisture and pore surface area are different, which can be reflected by isothermal absorption experiments on coal samples

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Evaluation and Prediction of Technically Recoverable CBM Resources,evaluation is the systematic cognition and comprehensive analysis of the geological, technical, economic attributes and quantitative relations of mineral resources. The quantitative recoverable evaluation of CBM resources should and must follow the normative and systematic theories and comprehensive

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Seismic Prediction Technology of Favorable CBM Zones, geological parameters of CBM occurrence as a breakthrough point, systematically researched the theory and technologies for seismic data acquisition, processing, interpretation and inversion of CBM reservoirs, and used these technologies to obtain high-precision inversion results of the distribution

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Desorption-Seepage Mechanism and Development Schemes,shrinkage of coal matrix and enlargement of pores and fractures, and accordingly increasing permeability; on the other hand, as fluid pressure decrease, effective stress will increases, pore and fractures will close and permeability will reduce.

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Stimulation Mechanism and Application,ity. In the design of fracture height and width, it is necessary to have an accurate understanding of in-situ stress and coal rock mechanics. In addition, in the study of fracture pressure and wellbore stability in fracturing construction, it is also necessary to test and study the rock mechanical p