... Abstract One of the keys to successful and environmentally responsible well stimulation programs in coal seam gas development is to establish consistent procedures for the safeguarding, planning and executing activities across multiple wells. The aim of this paper is to show how a novel...

... Abstract Hydraulic fracture stimulation of low permeability source rock-reservoirs is increasing in the industry and low-permeability, deeply buried coals, "Deep Coals," represent an underdeveloped resource in the Cooper Basin of South Australia. Numerous treatments have been performed...

... Walloons Coal Measures are located in the Jurassic age Surat Basin of southeast Queensland ( Fig. 1 ). The Surat Basin contains abundant coal measures in up to 30 individual seams which vary in thickness from over 5 metres to less than 10 centimetres (see Fig. 1 ). Coal seams are interbedded...

...Introduction Australian exploration for coal seam gas commenced in the 1980s. The commercial production of CSG started in 1996 in the Bowen Basin from the Permian Coal Measures in Central Queensland. In the last decade CSG production has increased rapidly, peaking at 1,634 wells drilled...

.... The resulting CH density measurement would be too high and hence application of the standard 1.75 g/cc density cut-off to CH density would result in a comparative loss of coal identification. As a result of this issue a study was conducted to compare net coal summaries generated from OH and CH density logs...

... 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...

... complex reservoir government stimulation high pressure high temperature coal Xinjiang natural gas resident Upstream Oil & Gas local resident Tarim basin social environment Keshen gas field society of petroleum engineers HPHT local government oilfield company backflow fluid...

... 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...

... Upstream Oil & Gas coal sandstone completion fluid treatment Asri Basin mechanical restriction basin conformance improvement oil field oil production water cut Completion Fluid injection Well Intervention society of petroleum engineers wellbore BOPD crude oil Talang Akar Formation...

... 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...

... 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 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...

... 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 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...

...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...

... on their Sanga Sanga license in East Kalimantan, Indonesia. Both wells passed through soft shales and coals that exhibited breakouts in offset wells, in addition to heavily depleted zones exhibiting large fluid losses in an area well known for shallow gas blowouts. Geomechanical analysis of information from...

... Abstract The production process of coalbed methane (CBM) includes desorption, diffusion and seepage, and the production is controlled by these three processes together. The permeability of coal reservoir is generally low. To increase the coalbed methane production, well stimulation needs...

... 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...

... production, subsurface allocation of flowing contributions can be achieved through the use of production logging tools, which provide a measurement of volumetric flow rate and fluid density along the completed well length. The nature of Coal Seam Gas (CSG) well completions reduces the options available...