The West Erregulla gas discovery. Implications for an extensive Permian play fairway across the onshore northern Perth Basin, Western Australia

The West Erregulla field is a significant new discovery in the northern Perth Basin that expands the play fairways for the basal Triassic/late Permian sandstones of the Dongara/Wagina formations and early Permian sandstones of the Kingia/High Cliff formations. The 2019 discovery well, West Erregulla-2, targeted three stacked seismic amplitude anomalies interpreted to be gas-charged conventional sandstones at depths between 4100m and 5000m. Gas charge is confirmed in all three units. Gas is hosted in linked, reactivated Permian-aged fault blocks located in the axial part of the Dandaragan Trough. They represent a down-dip analogue to the Waitsia gas field NW of West Erregulla. Only the Kingia sandstone was tested in West Erregulla-2. It contains good to excellent quality reservoir with >55m of pay averaging 12.6% porosity and gas saturations of 65%. Despite deep burial, porosity of the reservoirs was retained by a combination of syndepositional clay coatings and early burial gas charge. Testing of this zone achieved a maximum sustained flow rate of 69mmcf/day. Wireline logs and seismic mapping suggest the presence of a large gas field with gross gas column height of >200m over an area of ~40km2. Scoping volumetric estimates using a range of possible gas water contact (GWC) suggest a P50 in-place original gas in place (OGIP) of ~1182 Bcf for the Kingia formation (informal name). The West Erregulla, Waitsia and Beharra springs deep fields contain significant gas resources. Their spatial distribution suggests the existence of a deep, regional Permian fairway that could cover a large portion of the Perth Basin.

‘Our Own Poor’: Transnational charity, development gifts, and the politics of suffering in Sylhet and the UK

Based on fieldwork in Bibiyana, northeast Bangladesh, this article compares the transnational charity offered to known individuals by migrant, UK-based families with the philanthropic efforts of the multinational company Chevron, which operate a large gas field in the neighbourhood. Applying Fassin's notion of the ‘politics of suffering’ to both types of exchange, the article argues that the two types of giving are underlain by incommensurate moral economies. While in instances of transnational charity, social inequality and the compassion felt towards the suffering of known people, or ‘our own poor’, underscore the exchanges, in the philanthropic efforts of ‘community engagement’ the inequality of giver and receiver is repressed and the exchange is animated by a moral economy. The latter is rooted in Christianity, in which compassion guides actions towards the suffering of unknown, anonymous strangers.

Ecological Restoration Approaches for CO2 Emission from a Large Gas Field at Operation Period

The capacity of a large gas field is up to hundreds of billions of cubic metres, and percentage of the CO2 volume in raw gas is 8%~10%. Estimated by survey data and empirical equations, over 60% of the total emission from the gas field can be absorbed and utilized by regional crops and vegetation, and nearly a million tons per year exhausted. Based on analysis of mechanism and effect of CO2 influence on regional plants, soil and atmosphere, approaches for regional ecological restoration are put forward, including the approach of regional crops restoration, other plants restoration, ecological landscape reconstruction, and CO2 reduction technologies. This study provides reference for sustainable development of other gas field in low carbon era.