The influence of petrological properties and burial history on coal seam methane reservoir characterisation, Sydney Basin, Australia

Faiz, Mohinudeen; Saghafi, A.; Sherwood, Neil; Wang, I.

doi:10.1016/j.coal.2006.02.012

Cited by 147 publications

(84 citation statements)

References 14 publications

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“…Theoretically, the gas content in syncline region is higher than that in anticline region because syncline has relative deeper http://www. burial depth and higher reservoir pressure than anticline (Faiz et al, 2007). However, the core regions of syncline and anticline have been deformed severely, as a result, the flank regions of syncline and anticline tend to have higher gas content.…”

Section: The Effects Of Burial Depth On Gas Contentmentioning

confidence: 99%

“…Great number of papers and reports in various CBM-producing basins around the world show that the gas content increases with the increasing burial depth in the shallow buried area, but decreases with the burial depth increasing in the deep buried area (Bustin and Clarkson, 1998;Faiz et al, 2007;Wang et al, 2013;Cai et al, 2014). The coal reservoir pressure usually increases with the increasing burial depth.…”

Section: The Effects Of Burial Depth On Gas Contentmentioning

confidence: 99%

“…Basin-scale investigation of the CBM resource have been performed in the Piceance and Matanuska basins in the United states (Johnson and Flores, 1998;Payne and Ortoleva, 2001), the Bowen and Sydney basins in Australia (Boreham et al, 1998;Faiz et al, 2007), and the Qinshui and Ordos basins in China (Wang et al, 2013;Cai et al, 2014). Previous reports and papers show that geologic structure is the most important control factor of reservoirs of CBM.…”

Section: Introductionmentioning

confidence: 99%

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Geologic Structural Controls on Coalbed Methane Content of the No. 8 Coal Seam, Gujiao Area, Shanxi, China

Xia¹

2017

Appl Ecol Env Res

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Abstract. Gas contents are highly heterogeneous in coalbed methane (CBM) reservoirs of the Gujiao area, Shanxi province, China. Diverse geologic data and stimulate methods were used to provide insight into the origin of this variability and the consequences of gas content in the No. 8 coal seam. The results show that the No. 8 coal seam experienced two gas-generating periods and one fluctuant period, and has stepped into migration period since the Late Cretaceous. The distribution of gas content of the No. 8 coal seam in the Gujiao area is mainly dominated by structural form, water level and burial depth, all of which are structural related parameters. The gas content in the subarea A is much lower than that in the subarea B because the subarea A is deformed severely and the subarea B is a gentle monocline. The gas content first increases and then decreases with increasing burial depth, and the turning burial depth is about 600.0 m. Strong runoff area is harmful for preserving gas due to the washing effect in it. The analyzing results show that: gentle and simple monocline blocks with burial depth ranges from 500.0 m to 800.0 m, water level lower than 900.0 m is the most important "sweet spots" for CBM development in the Gujiao area.

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Section: The Effects Of Burial Depth On Gas Contentmentioning

confidence: 99%

Section: The Effects Of Burial Depth On Gas Contentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Geologic Structural Controls on Coalbed Methane Content of the No. 8 Coal Seam, Gujiao Area, Shanxi, China

Xia¹

2017

Appl Ecol Env Res

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“…Some studies have provided a basic understanding of the coal-reservoir characteristics including petrological properties, microfractures and pores, permeability, burial history, and their influences on methane adsorption capacity and producibility of coals (Crosdale and Beamish, 1993;Andrew et al, 2006;Laxminarayana and Crosdale, 1999;Mastalerz et al, 2004;Levine, 1992;Faiz et al, 2007;Su et al, 2001;Sun et al, 2002;Sun, 2003;Radlinski et al, 2004;Mastalerz et al, 2008;Yao et al, 2009;Sun et al, 2010). Researches on the parameters of depositional environments, hydrogeologic features, coal metamorphism, permeability, reservoir pressure, and gas content emphasized the evaluation of coal reservoirs (Kaiser et al, 1994;Su, 1998;Scott, 2002;Liu et al, 2005;Song et al, 2005;Hildenbrand et al, 2006;Yao et al, 2008;Wang et al, 2009;Zhang et al, 2009;Sun et al, 2009;Qin et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Characteristics of High Rank Coalbed Methane Reservoir from the Xiangning Mining Area, Eastern Ordos Basin, China

Ding

Zhu

Zhen

et al. 2011

Energy Exploration & Exploitation

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For the purpose of better estimating the CBM resource potential in the study area, the high rank CBM reservoirs were studied by geological surveys and laboratory measurements in Xiangning mining area, eastern Ordos Basin. Geological characteristics of coals in the Xiangning mining area provide favourable conditions for the development of CBM reservoirs. Coal seams are dominated by semibright coal, which are all low volatile anthracite coal with R max ranging from 2.22 to 2.50%. No. 2, 3 and 10 coal seams are vitrinite-rich (81.2%, averagely) and low to middle ash yield coals (16.86-21.49%, averagely). The permeability values of coal reservoirs range form 0.0067 to 0.268 mD, and the porosity is from 2.82 to 4.14% in the study area. Microfractures are mainly tensile structure, pores of coals are dominated by macropores, mesopores came next to it followed by micropores, and the great majority of induced porosity is stomas in the study area. No. 2, 3 and 10 CBM reservoirs are characterized by higher gas capacities (26.08 to 27.27 m 3 /t, V L ). The gas content of CBM reservoirs has a positive correlation with the burial depth.

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“…Chen (Chen et al, 2013) assume coal wettability is homogenous and constant, perhaps wettability is a complex heterogeneous composition dependent on factors including depositional history and mineral matter content (Faiz et al, 2007b). Experimentally measured relative permeability using coal cores in the laboratory under steady or unsteady methods detail a cross-point water saturation fraction in the relative permeability curve exceeding 0.5, implying coal is water wet (Conway et al, 1995a;Durucan et al, 2013;Ham and Kantzas, 2011;Purl et al, 1991;Rahman and Khaksar, 2007;Shen et al, 2011 (Kaveh et al, 2012;Saghafi et al, 2014), gas desorption (Ham and Kantzas, 2008;Ham and Kantzas, 2011), mineral matter (Gosiewska et al, 2002b) and liquid characteristics including ion concentration (Albijanic et al, 2010;Mishra et al, 2002) and pH (Chaturvedi et al, 2009).…”

Section: Research Problemmentioning

confidence: 99%

The Effect of Water Occlusion on Gas Production in Coal

Mahoney¹

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Relative permeability is of fundamental importance to understand and model the flow of hydrocarbons and water in porous rocks including coal, and thus relative permeability is critical in prediction of commercial gas and water production rates from coal seam gas (CSG) reservoirs.Despite relative permeability being a primary parameter for determining reservoir performance, the fundamental physics of how or where water may occlude or block cleats in a coal seam, and thereby interfere with gas production rates, is not fully understood. This project aims to improve the understanding of water occlusion in CSG reservoirs through fluid experiments with model coal cleats and to evaluate the potential impact of water occlusion of reservoir performance.The aim of this thesis is to develop a new experimental methodology that can be used identify the main control factors that affect wettability in coal. There are two key objectives to satisfy the thesis aim 1) develop methods to make artificial channels in coal and 2) create a world first microfluidic device that assess micro scale flow through coal cleats, known as the cleat flow cell (CFC). The initial features to be evaluated will include: lithotype, surface roughness, surface composition, specifically chemical functional groups and pressure. oxygen plasma with a photolithography process to make the desired pattern on coal surface, UV Laser ablation, mechanical machining, a mechanical scratch technique, and a chemical etching technique that used potassium permanganate (KMnO4). Characteristics of the artificial channels were assessed using a surface step profiler, scanning electron microscopy, micro-Raman spectroscopy and light microscopy. A sixth methodology to create an artificial channel using pressed coal powder was also used as a means of evaluating the influence of the surface chemistry on the wetting behaviour, without the interference of surface topography.In Chapter Five, I report the effect of rank and lithotype on the wettability of coal in microfluidic experiments in two types of artificial microchannels; (1) reactive ion etched (RIE) channels and (2) die-cast channels prepared by pressing powdered lithotype concentrates. Contact angles and entry pressures of air and water in the artificial cleats were measured in imbibition experiments performed iii with a CFC. The relative contact angles measured in CFC imbibition experiments were in the range 110 -140° in the RIE channels and 85°-115° in the pressed discs, which are larger contact angles than measured on the flat bulk surfaces of these samples by the conventional sessile drop technique (58°-85°). The CFC observations show that the surface roughness of coal in inertinite-rich dull bands effects contact angle and the entry pressure of the air-water interface differently to the vitrinite-rich bright bands, with both lithotypes presenting unique wetting states. Drainage experiments revealed a thin residual water film on the inertinite cleat wall, not observed on the smoother vitrinite channel. were hydr...

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The influence of petrological properties and burial history on coal seam methane reservoir characterisation, Sydney Basin, Australia

Cited by 147 publications

References 14 publications

Geologic Structural Controls on Coalbed Methane Content of the No. 8 Coal Seam, Gujiao Area, Shanxi, China

Geologic Structural Controls on Coalbed Methane Content of the No. 8 Coal Seam, Gujiao Area, Shanxi, China

Characteristics of High Rank Coalbed Methane Reservoir from the Xiangning Mining Area, Eastern Ordos Basin, China

The Effect of Water Occlusion on Gas Production in Coal

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