The petroleum prospectivity of the Oobagooma Sub-basin and adjacent Leveque Platform, North West Shelf, Australia

2016 ◽  
Vol 56 (2) ◽  
pp. 563
Author(s):  
Paul Harrison ◽  
Chris Swarbrick ◽  
Jim Winterhalder ◽  
Mark Ballesteros
Keyword(s):  
Oil And Gas ◽  
Long Distance ◽  
The West ◽  
North West ◽  
Canning Basin ◽  
The Past ◽  
The North ◽  
Late Tertiary ◽  
Exploration Drilling ◽  
Hydrocarbon Charge

The Oobagooma Sub-basin of the Roebuck Basin includes the offshore extension of the onshore Fitzroy Trough of the Canning Basin. Together with the Leveque Platform, it covers an area of approximately 50,000 km2, yet only 14 exploration wells have been drilled in the area to date, five of which were drilled in the past 30 years. The sub-basin contains sediments ranging in age from Ordovician to Recent. This study examines the petroleum prospectivity of a region that is one of the least explored on Australia’s North West Shelf. Recent exploration drilling has revived interest in the area, with the 2014 Phoenix South–1 oil discovery in the offshore Bedout Sub-basin and the 2015 Ungani Far West–1 oil discovery in the onshore Fitzroy Trough. The two most significant source rock sequences relevant to the Oobagooma Sub-basin are the Carboniferous Laurel Formation and the Jurassic section. The former interval is part of a proven petroleum system onshore and is the source of the gas discovered at Yulleroo and oil at Ungani and Ungani Far West. A thick Jurassic trough to the north of the Oobagooma Sub-basin is believed to be the source of the oil and gas in Arquebus–1A and gas in Psepotus–1. Hydrocarbon charge modelling indicates significant expulsion occurred during both the Cretaceous and Tertiary from both source intervals. Trap timing is generally favourable given that inversion structures formed in several episodes during the Late Jurassic to Late Tertiary. The Early Triassic, now proven to be oil prone in the Phoenix South area (Molyneux et al, 2015), provides an additional (albeit less likely) source for the Oobagooma Sub-basin. These rocks are thin to absent within the Oobagooma Sub-basin, so long-distance migration would be required from deep troughs to the west.

III.—The Pre-Cambrian Rocks of Wales

1893 ◽  
Vol 10 (9) ◽  
pp. 396-401
Author(s):  
Henry Hicks
Keyword(s):  
Recent Article ◽  
British Isles ◽  
The West ◽  
British Geological Survey ◽  
England And Wales ◽  
North West ◽  
The Past ◽  
The North ◽  
History Of ◽  
Lithological Character

In a recent article on the Pre-Cambrian Rocks of the British Isles in the Journal of Geology, vol. i., No. 1, Sir Archibald Geikie makes the following statement: “There cannot, I think, be now any doubt that small tracts of gneiss, quite comparable in lithological character to portions of the Lewisian rocks of the North-West of Scotland, rise to the surface in a few places in England and Wales. In the heart of Anglesey, for example, a tract of such rocks presents some striking external or scenic resemblance to the characteristic types of ground where the oldest gneiss forms the surface in Scotland and the West of Ireland.” To those who have followed the controversy which has been going on for nearly thirty years between the chiefs of the British Geological Survey and some geologists who have been working amongst the rocks in Wales, the importance of the above admission will be readily apparent; but as it is possible that some may be unable to realize what such an admission means in showing geological progress in unravelling the history of the older rocks in Wales during the past thirty years, a brief summary of the results obtained may possibly be considered useful.

VARIABILITY OF ORE MINERALIZATION IN THE NORTH-WEST-TRENDING EXTENSIONOF THE LUBIN–SIEROSZOWICE DEPOSIT

2017 ◽  
pp. 109-0 ◽  
Author(s):  
Sławomir OSZCZEPALSKI ◽  
Andrzej CHMIELEWSKI ◽  
Stanisław SPECZIK
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Core Material ◽  
Gas Industry ◽  
Sulphide Mineralization ◽  
North West ◽  
The North ◽  
Ore Mineralization ◽  
Exploration Drilling ◽  
Drill Holes

The Polish Geological Institute – NRI has conducted investigations of the Kupferschiefer series since 1957, when the giant sediment-hosted stratiform Cu-Ag ore deposit was discovered in the central part of the Fore-Sudetic Monocline. Until 1991, a number of drilling programs were completed by PGI-NRI and later research has been focusing mainly on cooperation with oil and gas industry and their core material. Over the last few years, thanks to systematic examination of the drill holes located in the north-western extension, many prospective areas have been recognized and delineated. These prospects are located between Lubin-Sieroszowice deposit and the eastern part of the Zielona Góra oxidized field. In the Kożuchów area, the lower part of Zechstein copper-bearing series contain only relict sulphide mineralization accompanied by iron oxides while reduced rocks with metal sulphides occur in the uppermost part of Zechstein Limestone or at the base of Lower Anhydrite. Grochowice area, where reduced facies prevail in copper-bearing series, is characterized by the predomination of rich Cu-Ag mineralization proximaly to oxidized area. The western part of studied area is dominated by Cu-S type sulphides (chalcocite, digenite, covellite) whereas the eastern part is represented by Cu-Fe-S type minerals (bornite, chalcopyrite) with high galena and sphalerite concentrations. The spatial variability of sulphide mineralization with respect to the oxidized rocks indicates that Bytom Odrzański deposit extends in the north-west direction, continuing in the form of a copper belt along the eastern border of the oxidized area. An extensive deep exploration drilling program is implemented to verify the resource potential within predicted copper belt.

Rome, Pamphylia and Cilicia, 133–70 B.C.

1976 ◽  
Vol 66 ◽  
pp. 1-14 ◽  
Author(s):  
A. N. Sherwin-White
Keyword(s):  
Coastal Plain ◽  
Easy Access ◽  
Clear Understanding ◽  
The West ◽  
North West ◽  
Political Role ◽  
The Past ◽  
North East ◽  
The North ◽  
Lower Block

There has been much debate about the nature and purpose of the Roman intervention in Pamphylia between 102 and 70 B.C., to which a new edge has been given by the discovery of the extensive new fragments of the ‘Piracy Law’ of 101–100. Any solution needs a clear understanding of the strategic geography of the region and its political role within the kingdom of Pergamum that became the province of Asia. This fertile though narrow coastal plain, hemmed in by the western prolongation of the Taurus mountains, between the high massif of Cilicia Aspera in the east and the lower block of Lycia in the west, with the Pisidian chains to the north, is the coastal face of the isolated and difficult country of Pisidia. The deltas of the Pisidian rivers, notably Cestros and Eurymedon, enrich the narrow plain of Pamphylia. Practicable access to the interior for large forces dependant on wheeled transport for supplies is provided by three difficult routes leading through the Pisidian mountains from the coastal harbours: the first goes north-west from Attaleia past Termessus into and through the mountainous Milyas region that lies behind Lycia to Cibyra, and thence to Laodicea on the upper Maeander (Lycus) in Carian Asia. The second and easiest goes northwards from Attaleia to Sagalassus in the heart of Pisidia, and thence to Apamea on the Phrygian plateau—with a difficult branch north-east to Pisidian Antioch and Philomelium—and the third goes north and north-east from Side through the highest section of the Pisidian mountains, passing between the great Lake Caralis and the northern end of the High Taurus into the elevated plateau of Lycaonia: thence, from the communication centre of Iconium, there is easy access to Cappadocia by the central highway that links Apamea, Iconium and Mazaca. Pamphylia thus forms the southern gateway to Pergamene and Roman Asia, and to the Cappadocian kingdom behind the main chains of the Taurus. Hence it was of strategic interest to the Hellenistic kingdoms, which in the past had sought to control it and to found cities in it, and most notably after the Treaty of Apamea, to the kings of Pergamum.

Petroleum Resource Rent Tax: an update on recent developments

2012 ◽  
Vol 52 (2) ◽  
pp. 654
Author(s):  
Ian Crisp
Keyword(s):  
Oil And Gas ◽  
Due Diligence ◽  
Resource Rent ◽  
North West ◽  
The Past ◽  
The North ◽  
Petroleum Resource ◽  
Recent Developments ◽  
Key Issues ◽  
Oil And Gas Companies

Although the Petroleum Resource Rent Tax (PRRT) has been operating for longer than 20 years, the past few years have seen a significant amount of activity on this front: The announcement by the Australian government, on 2 July 2010, to expand the existing PRRTto include onshore oil and gas projects, including coal seam gas projects and the North West Shelf Project. The release of three ATO draft taxation rulings in 2010 about the pre-conditions for the deductibility of project expenditure, excluded expenditure (including indirect administration expenses) and the treatment of expenditure paid under ’sub-contractor’ arrangements. The courts’ decisions about the treatment of contract payments and the application of the PRRT taxing point. This extended abstract explores these developments as they apply to existing and new PRRT taxpayers, and identify the key issues that oil and gas companies will need to be aware of as they continue or commence compliance with the PRRT. This extended abstract also explores the impacts of these developments on transaction structuring, due diligence, financial modelling and fiscal certainty in the broader context of asset portfolios.

Exploration activities in the Netherlands and North-West Europe since Groningen

2001 ◽  
Vol 80 (1) ◽  
pp. 33-52 ◽  
Author(s):  
K.W. Glennie
Keyword(s):  
North Sea ◽  
Oil And Gas ◽  
Atlantic Coast ◽  
Academic Research ◽  
Well Being ◽  
North West ◽  
The Past ◽  
The North ◽  
The North Sea ◽  
The Uk

AbstractOnce the great size of the Groningen Field was fully realized late in 1963, exploration in the southern North Sea was a natural development as the reservoir bedding dipped westward. The origin of that bedding was not certain, one possibility, dune sands, led immediately to a program of desert studies.Licensing regulations for Netherlands waters were not finalized until 1967, offshore exploration beginning with the award of First Round licenses in March 1968. In the UK area, the Continental Shelf Act came into force in May 1964, paving the way for offshore seismic, the first well being spudded late in that year. The first two wells were drilled on the large Mid North Sea High; both were dry, the targeted Rotliegend sandstones being absent. Then followed a series of Rotliegend gas discoveries, large and small, west of Groningen, so that by the time exploration began in Netherlands waters the UK monopoly market was saturated and exploration companies were already looking north for other targets including possible oil.The Rotliegend was targeted in the earliest wells of the UK central North Sea even though there had already been a series of intriguing oil shows in Chalk and Paleocene reservoirs in Danish and Norwegian waters. These were followed early in 1968 by the discovery of gas in Paleocene turbidites at Cod, near the UK-Norway median line. The first major discovery was Ekofisk in 1969, a billion-barrel Maastrichtian to Danian Chalk field. Forties (1970) confirmed the potential of the Paleocene sands as another billion barrel find, while the small Auk Field extended the oil-bearing stratigraphy down to the Permian. In 1971, discovery of the billion-barrel Brent field in a rotated fault block started a virtual ‘stampede’ to prove-up acreage awarded in the UK Fourth Round (1972) before the 50% statutory relinquishment became effective in 1978.Although the geology of much of the North Sea was reasonably well known by the end of the 1970s, new oil and gas reservoirs continued to be discovered during the next two decades. Exploration proved the Atlantic coast of Norway to be a gas and gas-condensate area. The stratigraphiC range of reservoirs extended down to the Carboniferous (gas) and Devonian (oil), while in the past decade, forays into the UK Atlantic Margin and offshore Ireland met with mixed success. During this hectic activity, Netherlands exploration confirmed a range of hydrocarbon-bearing reservoirs; Jurassic oil in the southern Central Graben, Jurassic-Cretaceous oil derived from a Liassic source mainly onshore and, of course, more gas from the Rotliegend. German exploration had mixed fortunes, with no commercial gas in the North Sea and high nitrogen content in Rotliegend gas in the east. Similarly in Poland, where several small Zechstein oil fields were discovered, the Rotliegend gas was nitrogen rich. The discovery of some 100 billion barrels of oil and oil equivalent beneath the waters of the North Sea since 1964 led to an enormous increase in geological knowledge, making it probably the best known area of comparable size in the World. The area had a varied history over the past 500 million years: platete-tonic movement, faulting, igneous activity, climatic change, and deposition in a variety of continental and marine environments, leading to complex geometrical relationships between source rock, reservoir and seal, and to the reasons for diagenetic changes in the quality of the reservoir sequences. Led by increasingly sophisticated seismic, drilling and wireline logging, and coupled with academic research, the North Sea developed into a giant geological laboratory where ideas were tested and extended industry-wide.

scholarly journals The Distribution of some Plankton Animals in the English Channel and Western Approaches: I. Samples Taken with Stramin Nets in 1955 and 1957

1961 ◽  
Vol 41 (1) ◽  
pp. 17-35 ◽  
Author(s):  
A. J. Southward
Keyword(s):  
Indicator Species ◽  
Warm Water ◽  
English Channel ◽  
The South ◽  
Direct Path ◽  
The West ◽  
Sea Temperature ◽  
North West ◽  
The Past ◽  
The North

Previous plankton work at Plymouth is reviewed briefly, and the limitations of the stramin ring trawl as a quantitative sampler discussed. The distribution of certain zooplankton ‘indicator’ species caught in hauls of the 2 and 1 m ring trawl during cruises in 1955 and 1957 is described in comparison with regular 2 m hauls taken throughout the same years at two stations near Plymouth.The results support previous suggestions that ‘western’ water at Plymouth is derived from a region to the south of Ireland, i.e. from the north-west, and is not now in the direct path of the flow of water into the English Channel from the west.An apparent northward spread of the warm-water copepod Euchaeta hebes during the past 50 years may be connected with the rise in sea temperature over the same period. It is suggested that related changes in distribution might be responsible in part for changes in the macroplankton community off Plymouth since the 1920's.

Geothermal condition and outlook for oil and gas deposits in the north-west Black Sea shelf

2002 ◽  
Vol 8 (2-3) ◽  
pp. 206-208
Author(s):  
V.G. Osadchyi ◽  
◽  
O.A. Prykhod'ko ◽  
I.I. Hrytsyk ◽  
◽  
...  
Keyword(s):  
Black Sea ◽  
Oil And Gas ◽  
North West ◽  
The North ◽  
West Black Sea

Field guide to Laramide basin evolution and drilling activity in North Park and Middle Park, Colorado

2016 ◽  
Vol 53 (4) ◽  
pp. 283-329
Author(s):  
Marieke Dechesne ◽  
Jim Cole ◽  
Christopher Martin
Keyword(s):  
Oil And Gas ◽  
Front Range ◽  
Geologic Mapping ◽  
The West ◽  
Field Guide ◽  
Coal Resources ◽  
The North ◽  
Continental Divide ◽  
North Park ◽  
Park Area

This two-day field trip provides an overview of the geologic history of the North Park–Middle Park area and its past and recent drilling activity. Stops highlight basin formation and the consequences of geologic configuration on oil and gas plays and development. The trip focuses on work from ongoing U.S. Geological Survey research in this area (currently part of the Cenozoic Landscape Evolution of the Southern Rocky Mountains Project funded by the National Cooperative Geologic Mapping Program). Surface mapping is integrated with perspective from petroleum exploration within the basin. The starting point is the west flank of the Denver Basin to compare and contrast the latest Cretaceous through Eocene basin fill on both flanks of the Front Range. The next stop continues on the south end of the North Park–Middle Park area, about 60 miles [95km] west from the first stop. A general clockwise loop is described by following U.S. Highway 40 from Frasier via Granby and Kremmling to Muddy Pass after which CO Highway 14 is followed to Walden for an overnight stay. On the second day after a loop north of Walden, the Continental Divide is crossed at Willow Creek Pass for a return to Granby via Highway 125. The single structural basin that underlies both physiographic depressions of North Park and Middle Park originated during the latest Cretaceous to Eocene Laramide orogeny (Tweto, 1957, 1975; Dickinson et al., 1988). It largely filled with Paleocene to Eocene sediments and is bordered on the east by the Front Range, on the west by the Park Range and Gore Range, on the north by Independence Mountain and to the south by the Williams Fork and Vasquez Mountains (Figure 1). This larger Paleocene-Eocene structural basin is continuous underneath the Continental Divide, which dissects the basin in two approximately equal physiographic depressions, the ‘Parks.’ Therefore Cole et al. (2010) proposed the name ‘Colorado Headwaters Basin’ or ‘CHB,’ rather than North Park–Middle Park basin (Tweto 1957), to eliminate any confusion between the underlying larger Paleocene-Eocene basin and the two younger depressions that developed after the middle Oligocene. The name was derived from the headwaters of the Colorado, North Platte, Laramie, Cache La Poudre, and Big Thompson Rivers which are all within or near the study area. In this field guide, we will use the name Colorado Headwaters Basin (CHB) over North Park–Middle Park basin. Several workers have described the geology in the basin starting with reports from Marvine who was part of the Hayden Survey and wrote about Middle Park in 1874, Hague and Emmons reported on North Park as part of the King Survey in 1877, Cross on Middle Park (1892), and Beekly surveyed the coal resources of North Park in 1915. Further reconnaissance geologic mapping was performed by Hail (1965 and 1968) and Kinney (1970) in the North Park area and by Izett (1968, 1975), and Izett and Barclay (1973) in Middle Park. Most research has focused on coal resources (Madden, 1977; Stands, 1992; Roberts and Rossi, 1999), and oil and gas potential (1957, all papers in the RMAG guidebook to North Park; subsurface structural geologic analysis of both Middle Park and North Park (the CHB) by oil and gas geologist Wellborn (1977a)). A more comprehensive overview of all previous geologic research in the basin can be found in Cole et al. (2010). Oil and gas exploration started in 1925 when Continental Oil's Sherman A-1 was drilled in the McCallum field in the northeast part of the CHB. It produced mostly CO2 from the Dakota Sandstone and was dubbed the ‘Snow cone’ well. Later wells were more successful finding oil and/or gas, and exploration and production in the area is ongoing, most notably in the unconventional Niobrara play in the Coalmont-Hebron area.

Excavations at Fishbourne, 1963. Third Interim Report

1964 ◽  
Vol 44 (1) ◽  
pp. 1-8
Keyword(s):  
Interim Report ◽  
The West ◽  
Civic Society ◽  
North West ◽  
The Third ◽  
North East ◽  
The North ◽  
The Future ◽  
Set Up

Early in 1963 much of the land occupied by the Roman building at Fishbourne was purchased by Mr. I. D. Margary, M.A., F.S.A., and was given to the Sussex Archaeological Trust. The Fishbourne Committee of the trust was set up to administer the future of the site. The third season's excavation, carried out at the desire of this committee, was again organized by the Chichester Civic Society.1 About fifty volunteers a day were employed from 24th July to 3rd September. Excavation concentrated upon three main areas; the orchard south of the east wing excavated in 1962, the west end of the north wing, and the west wing. In addition, trial trenches were dug at the north-east and north-west extremities of the building and in the area to the north of the north wing. The work of supervision was carried out by Miss F. Pierce, M.A., Mr. B. Morley, Mr. A. B. Norton, B.A., and Mr. J. P. Wild, B.A. Photography was organized by Mr. D. B. Baker and Mrs. F. A. Cunliffe took charge of the pottery and finds.

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