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  • Petrophysical Characterization of the Pore Structure of Coal

     · Coalbed methane (CBM) is an important unconventional gas resource and pore structure characterization is important for CBM reservoir evaluation. Existing methods for studying the petrophysical properties of coal have limitations on the data quality or require sample destruction. In this chapter we present the experimental results of low-field

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  • Petrophysical characterization of Chinese coal cores with

    Petrophysical characterization of Chinese coal cores with heat treatment by nuclear magnetic resonance Yidong Caia b Dameng Liua ⇑ Zhejun Panb Yanbin Yaoa Junqian Lia Yongkai Qiua a Coal Reservoir Laboratory National Engineering Research Center of CBM Development Utilization China University of Geosciences Beijing 100083 PR China bCSIRO Earth Science and Resource Engineering

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  • Evolution of coal petrophysical properties under

    Microwave irradiation technology can likely overcome the above limitations. In this study the effect of microwave irradiation on the petrophysical properties of an unconstrained bituminous coal was comprehensively investigated through a suite of integrated diagnostic techniques including Nuclear Magnetic Resonance and X-ray Computed Tomography.

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  • Evolution of Coal Petrophysical Properties under

    Request PDF Evolution of Coal Petrophysical Properties under Microwave Irradiation Stimulation for Different Water Saturation Conditions Coalbed methane (CBM) reservoirs generally have very

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  • Crain s Petrophysical Handbook Coal Rank Analysis

    Float Sink Analysis is used to separate non-coal cavings from cuttings samples. The crushed material is placed in a liquid with a density of 1.75 g/cc. The coal fraction is floated off and the non-coal sinks and is removed. Some mineral (ash) in the coal may sink reducing the apparent ash content.

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  • Sedimentological and Petrophysical Properties of

     · Sedimentological and Petrophysical Properties of Sandstone Facies belonging to Lambir Formation at Tusan Beach Miri Sarawak. by Nguyen Hoang Viet 14152 Dissertation submitted in partial fulfillment of Figure 39Hummocky cross-bedded sandstone with thin coal lense in between beds.

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  • Petrophysical characterization of Chinese coal cores with

     · The storage and transport properties are determined by the petrophysical properties of coals which are denoted as the porosity as well as by the pore size distribution connectivity and permeability.

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  • Variation of Petrophysical Properties and Adsorption

    The petrophysical properties of coal will vary during coalification and thus affect the methane adsorption capacity. In order to clarify the variation rule and its controlling effect on methane adsorption various petrophysical tests including proximate analysis moisture measurement methane isothermal adsorption mercury injection etc. were carried out on 60 coal samples collected from the

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  • Variation of petrophysical properties due to carbon

     · CO 2 can be used to enhance coal bed methane recovery (3) the CO 2 can be stored in depleted oil and gas reservoirs and (4) the CO 2 can be stored in deep saline aquifers. Aquifers are considered to be the most widely available. Physical properties of carbon dioxide (CO 2) 3 Based on pressure and temperature CO 2 may exist in

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  • Variation of petrophysical properties due to carbon

     · CO 2 can be used to enhance coal bed methane recovery (3) the CO 2 can be stored in depleted oil and gas reservoirs and (4) the CO 2 can be stored in deep saline aquifers. Aquifers are considered to be the most widely available. Physical properties of carbon dioxide (CO 2) 3 Based on pressure and temperature CO 2 may exist in

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  • Acoustic properties of coal from lab measurement

     · worldwide coal bed gas resources are estimated from 164 to 686 trillion cubic meters. Its economic significance requires that we have a thorough understanding of the physical chemical and petrophysical properties of the coal among these the acoustic properties are essential for exploration and production of coal and coal bed gas.

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  • Experimental study comparing the microscopic properties

     · Qin L et al (2017) Changes in the petrophysical properties of coal subjected to liquid nitrogen freeze-thaw—a nuclear magnetic resonance investigation. Fuel 194 102–114. Article Google Scholar Qin L et al (2018a) Fractal dimensions of low rank coal subjected to liquid nitrogen freeze-thaw based on nuclear magnetic resonance applied for

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  • Acoustic properties of coal from lab measurement

     · worldwide coal bed gas resources are estimated from 164 to 686 trillion cubic meters. Its economic significance requires that we have a thorough understanding of the physical chemical and petrophysical properties of the coal among these the acoustic properties are essential for exploration and production of coal and coal bed gas.

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  • Coal Petrophysical Properties For Realistic Coal Gas

     · The principal drive of the petrophysical studies is to reduce the uncertainty in the static and dynamic reservoir models. The methodology presented is based strongly on the Gas Research Institute approach (Mavor and Nelson 1997) and supported by an extensive core coal database (>3000 desorption measurements) allowing a rigorous review of the gas content-bulk density relationship and

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  • Changes in the petrophysical properties of coal subjected

    Changes in these four freeze-thaw variables changed the petrophysical properties of the frozen-thawed coal samples the pore structure porosity and permeability of the coals were modified. Of these variables the number of freeze-thaw cycles had the most substantial effect on modifying the coal s petrophysical properties.

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  • Sedimentological and Petrophysical Properties of

     · Sedimentological and Petrophysical Properties of Sandstone Facies belonging to Lambir Formation at Tusan Beach Miri Sarawak. by Nguyen Hoang Viet 14152 Dissertation submitted in partial fulfillment of Figure 39Hummocky cross-bedded sandstone with thin coal lense in between beds.

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  • Evolution of Coal Petrophysical Properties under

    Microwave irradiation technology can likely overcome the above limitations. In this study the effect of microwave irradiation on the petrophysical properties of an unconstrained bituminous coal was comprehensively investigated through a suite of integrated diagnostic techniques including nuclear magnetic resonance and X-ray computed tomography.

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  • Experimental study on the petrophysical variation of

     · Petrophysical properties of coal include the size connectivity and distribution of pores and fractures (Yao and Liu 2012).Petrophysical characterization methods include SEM CT mercury intrusion and N 2 /CO 2 adsorption. The drawbacks of these methods are slow data acquisition inefficient testing limited aperture range and damage to samples (Fu et al. 2015).

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  • (PDF) Variation of Petrophysical Properties and Adsorption

     · The petrophysical properties of coal will vary during coalification and thus affect the methane adsorption capacity.

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  • International Journal of Coal Geologyuwyo.edu

     · Consequently petrophysical properties and their corresponding uncertainties can be evaluated more accurately. 1. Introduction Coal bed methane (CBM) is a form of natural gas trapped in coal-beds that accounts for enormous unconventional gas resources. In the past methane was recognized as a major mine hazard and vented from

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  • Petrophysical characterization of coals by low-field

     · Existing methods for studying petrophysical properties of coals include mercury intrusion porosimetry (MIP) gas adsorption scanning electron microscopy (SEM) transmission electron microscopy (TEM) and small angle scattering techniques (SAS) .

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  • Experimental study comparing the microscopic properties

     · Qin L et al (2017) Changes in the petrophysical properties of coal subjected to liquid nitrogen freeze-thaw—a nuclear magnetic resonance investigation. Fuel 194 102–114. Article Google Scholar Qin L et al (2018a) Fractal dimensions of low rank coal subjected to liquid nitrogen freeze-thaw based on nuclear magnetic resonance applied for

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  • Changes in the petrophysical properties of coal subjected

    Request PDF Changes in the petrophysical properties of coal subjected to liquid nitrogen freeze-thawA nuclear magnetic resonance investigation Liquid nitrogen (LN2) a non-aqueous medium

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  • International Journal of Coal Geology

    The differential heating between the heated and host phases causes evaporation and ejection of moisture and thermally stresses which will in turn affect the petrophysical property of coal

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  • Changes in the petrophysical properties of coal subjected

    Changes in these four freeze-thaw variables changed the petrophysical properties of the frozen-thawed coal samples the pore structure porosity and permeability of the coals were modified. Of these variables the number of freeze-thaw cycles had the most substantial effect on modifying the coal s petrophysical properties.

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  • Petrophysical Characterization and Fluids Transport in

     · Petrophysical Characterization and Fluids Transport in Unconventional Reservoirs presents a comprehensive look at these new methods and technologies for the petrophysical characterization of unconventional reservoirs including recent theoretical advances and modeling on fluids transport in unconventional reservoirs.The book is a valuable tool for geoscientists and engineers working in

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  • Constraining coalbed methane reservoir petrophysical and

    The presence of variable SDCs can have a considerable impact on CBM reservoir petrophysical and mechanical properties. Finally a CSI model that strives to establish the relation between structure deformation and CBM reservoir physical and mechanical properties in coal

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  • Coal Petrophysical Properties For Realistic Coal Gas

     · The principal drive of the petrophysical studies is to reduce the uncertainty in the static and dynamic reservoir models. The methodology presented is based strongly on the Gas Research Institute approach (Mavor and Nelson 1997) and supported by an extensive core coal database (>3000 desorption measurements) allowing a rigorous review of the gas content-bulk density relationship and

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  • Crain s Petrophysical Handbook Coal Bed Methane Analysis

    COAL BED METHANE BASICS. Coal-bed methane (CBM) is an economic source of natural gas that is generated and stored in coal beds. It is a widely occurring exploitable resource that can be easily recovered and used near the well or where. gas-pipeline infrastructure currently exists. Coal acts as both source rock and reservoir rock for methane.

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  • Variation of Petrophysical Properties and Adsorption

     · Abstract The petrophysical properties of coal will vary during coalification and thus affect the methane adsorption capacity. In order to clarify the variation rule and its controlling effect on methane adsorption various petrophysical tests including proximate analysis moisture measurement methane isothermal adsorption mercury injection

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  • Integrated petrophysical log evaluation for coalbed

     · The evaluation of coal property coal rank and gas content with the improved the SADE algorithm neural network model has high accuracy and this method is applicable to coalbed methane reservoir parameter evaluation. A fast computation model for fracture porosity is established on the basis of the dual laterolog numerical simulation.

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  • Evolution of Coal Petrophysical Properties under

     · Microwave irradiation technology can likely overcome the above limitations. In this study the effect of microwave irradiation on the petrophysical properties of an unconstrained bituminous coal was comprehensively investigated through a suite of integrated diagnostic techniques including nuclear magnetic resonance and X-ray computed tomography.

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  • Petrophysical characterization of high-rank coal by

     · To better apply nuclear magnetic resonance (NMR) to evaluate the petrophysical characterization of high-rank coal six anthracite samples from the Baijiao coal reservoir were measured by NMR. The porosity T 2 cutoff value permeability and pore type were analysed using the transverse relaxation time ( T 2 ) spectrum before and after

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  • Experimental study on the petrophysical variation of

     · NMR principles and theory Petrophysical properties of coal include the size connectivity and distribution of pores and fractures (Yao and Liu 2012). Petrophysical characterization methods include SEM CT mercury intrusion and N 2 /CO 2 adsorption.

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  • the petrophysics of shale gas reservoirs technical

     · In contemporary petrophysical parlance there are two types of reservoir those that conform to the implicit assumptions under- tight gas sands coal seam gas reservoirs gas hydrates and shale uncertainties in measured properties after understanding the

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  • Changes in the petrophysical properties of coal subjected

     · Petrophysical properties of coal involve the pore size distribution and connectivity of pores and fissures. The methods for determining pore size can be divided into qualitative and quantitative methods.

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  • Variation of petrophysical properties due to carbon

     · CO 2 can be used to enhance coal bed methane recovery (3) the CO 2 can be stored in depleted oil and gas reservoirs and (4) the CO 2 can be stored in deep saline aquifers. Aquifers are considered to be the most widely available. Physical properties of carbon dioxide (CO 2)

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  • Pore Damage Properties and Permeability Change of Coal

     · Changes in the petrophysical properties of rocks after artificial freeze-thaw action have extensively been discussed in coal region science in this field most researchers focus on the effect of pore water on the microstructure and physical properties of rocks when the temperature around rocks rapidly declines the pore water inside the

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  • (PDF) Variation of Petrophysical Properties and Adsorption

     · PDF The petrophysical properties of coal will vary during coalification and thus affect the methane adsorption capacity. In order to clarify the Find read and cite all the research you

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  • Detailed petrophysical and geophysical characterization of

    The evaluation of the CO2 geologic storage site requires a robust experimental database especially with respect to spatial petrophysical heterogeneities. The integrated analysis of minero-petrographical physical and geophysical parameters (e.g. longitudinal and transversal propagation velocity VpVs ratio dynamic elastic moduli etc.) of the rocks that make up a caprock-reservoir system can

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