... reservoir characterization well logging log analysis downhole intervention hydraulic fracturing complex reservoir macro metals & mining artificial intelligence flow in porous media well intervention upstream oil & gas thickness intervención de pozos petroleros coal bed...

... Abstract Many stakeholders are concerned about the effects of Coal Seam Gas (CSG) developments on aquifers. Well integrity issues are often mentioned as potential leakage pathways which could lead to aquifer contamination or depletion. This study involved the creation of simple models...

... Abstract Building a representative static model for predicting and monitoring performance of coal seam gas fields presents several complex and unique challenges. The individual reservoirs possess very different coal architectures, often with highly complex seam splitting, amalgamating...

... Since 2007, 68 coal seams were stimulated in 60 wells as add-on fracs to conventional sandstone wells. Like most unconventional reservoirs, these low permeability coals require hydraulic fracture stimulation to obtain economic flow rates. Post-stimulation production rates from successful add...

... set an example for the development of reservoirs in remote areas. HPHT local government oilfield company Upstream Oil & Gas local resident Tarim basin complex reservoir government stimulation high pressure high temperature coal backflow fluid China southern xinjiang drilling...

... Abstract This paper presents a case study review of the performance benefits of a 66 well Coal Bed Methane (CBM) development program whereby cased-hole (CH) logging was introduced as a substitute for open-hole (OH) logging. This paper demonstrates how the reduction in OH logging requirements...

... Abstract Walloons Coals of the Surat Basin, Queensland (Australia) contain world class Coal Seam Gas (CSG) plays, where permeability varies from high (>1Darcy), due to Gaussian curvature-related natural fracture connectivity, to low (<1mD) due to unidirectional fracture-systems attributed...

... that the Permian coal measures of the Toolachee, Epsilon and Patchawarra Formations record high levels of gas, often in excess of 4000 units, encountered at depths between 2500 and 3500m. Unlike shallower Coal-Seam-Gas reservoirs, which rely on de-pressuristion through de-watering to liberate adsorbed gas from...

... Abstract This experimental study aims to characterize the bioavailability of six Surat Basin Walloon coals to exogenous methanogenic consortia, and the possible compositional and environmental factors that control bioavailability. Finely crushed coal cores samples were inoculated with digested...

... of this research is involved in Gita Member of Talang Akar Formation. The Gita Member is composed of transgressive mudstone, shales, and coals and subordinate distributary and estuarine channel sandstones. Overall this sequence is represented by an intermediate base level fall superimposed on the long term base...

... and dynamic properties have been investigated. Values for some fundamental input parameters for coal seam gas (CSG) reservoir simulation, such as coal fracture porosity and relative permeability, are extremely difficult to constrain by laboratory test results and are typically derived from history matching...

... Abstract Past drilling of vertical and moderately deviated development wells in offshore Peninsular Malaysia and Vietnam has proven to be challenging. Drilling experience in the development wells highlighted the issue of wellbore instability in the respective areas, particularly though coal...

... Abstract The Surat Basin Coal Seam Gas (CSG) is maturing from exploration to production to meet sales targets for several Liquefied Natural Gas projects. This requires effective and predictable reservoir performance that is controlled by permeability, gas saturation and matching the well...

...Theory of the Unipore and the Bidisperse Model Diffusion observed in coal is typically approximated using models based on Fick's second law of diffusion for spherically symmetric flow ( Clarkson and Bustin, 1999b ). Both, unipore models, assuming a uniform pore size distribution...

... Abstract Drilling and stimulation of exploration and development wells in the Cooper Basin, Central Australia, has been challenging over the decades due to the high-pressure, high-temperature environment, the high stress anisotropy, and the presence of thick coals. Most of the wells drilled...

.... The stress anisotropy is considered to be the reason for preferential wellbore failure in sands instead of shaly siltstones. The stresses in interlayered thick coals tend to be near isotropic. It is also thought that the stress regime is not necessarily uniform with depth; the maximum horizontal stress...

... Abstract As unconventional resources such as Shale Gas and Coal Bed Methane become mainstream, many companies are looking towards the next generation of resource types. Coal to Liquids, Oil Shale, Underground Coal Gasification and Microbial Coal Conversion are examples of resource types...

... coal bed methane proppant adsorption hydraulic fracturing complex reservoir coalbed methane fracturing fluid guar gum fracturing materials coal seam gas Upstream Oil & Gas desorption-diffusion-seepage capacity diffusion coefficient formation water desorption quantity diffusion...

... reservoir geomechanics correlation shear failure ppg mud loss Reservoir Characterization coal drilling operation successful drilling drilling risk dod mud weight horizontal well meticulous drilling design mud-weight window real time system Upstream Oil & Gas mud weight shale...

... due to geological, cost and regulatory factors. The price response to the contracting supply of conventional oil will lead to price-driven substitution of liquid fossil fuels by natural gas and synthetic fuels from coal, in turn enhancing the economics of nuclear energy in the electric power market...