Geology and Petroleum Potential of Upper Cretaceous and Tertiary Strata, Beaufort-Mackenzie Area, Northwest Canada (1)

Five dry exploratory wells were drilled through Upper Cretaceous and Tertiary sediments on the West Greenland shelf in 1976 and 1977. Two of these entered Precambrian basement, two bottomed in Paleocene or Upper Cretaceous basalt, and one in Campanian mudstone. On the basis of samples and logs supplied to the Geological Survey of Greenland the sedimentary sequence has been divided into seven new formations: the Campanian Narssarmiut Formation, consisting of coarse basement wash and black mudstone; the Campanian to Eocene Ikermiut Formation, consisting of marine organic-rich mudstone; the Upper Paleocene to Eocene Hellefisk Formation, comprising shallow-marine to paralic sandstone and mudstone; the Eocene Nukik Formation, consisting of turbiditic sandstone and mudstone; the Eocene to Oligocene Kangâmiut Formation of shelf to shallow-marine clean and argillaceous sandstone; the Oligocene to Neogene Manîtsoq Formation, consisting of coarse paralic to fan delta sandstone; and the Neogene Ataneq Formation, consisting of protected shallow-marine mudstone.The sedimentary evolution of the area fits well with earlier proposed models for the tectonic evolution of the Baffin Bay–Labrador Sea region.Potential petroleum source rocks are present in the Upper Cretaceous to Paleocene mudstone, and, even though they are largely immature in the drilled sections, they are expected to have entered the petroleum generation zone in the deeper parts of the basin. Their potential is mainly for gas, but some oil potential is also present. No reservoir rocks were encountered in the deeper parts of the sedimentary sequences, and the porous sandstones that occur higher in the sequence lack seals.

Download Full-text

The drilling of stratigraphic borehole Umiivik-1, Svartenhuk Halvø, West Greenland

Bulletin Grønlands Geologiske Undersøgelse ◽

10.34194/bullggu.v172.6738 ◽

1996 ◽

Vol 172 ◽

pp. 22-27

Author(s):

K.J Bate ◽

F.G Christiansen

Keyword(s):

Marine Sediments ◽

Upper Cretaceous ◽

Petroleum Potential ◽

West Greenland ◽

Lower Tertiary

Svartenhuk Halvø is one of the few areas onshore West Greenland where Upper Cretaceous and Lower Tertiary marine sediments are exposed (Fig. 1). Geological studies in the area have been made intermittently since the late 1930s but have intensified since 1990 as part of the Survey's overall effort to assess the petroleum potential of the Disko - Nuussuaq - Svartenhuk Halvø area and adjacent offshore basins.

Download Full-text

STRUCTURE AND STRATIGRAPHY OF THE CEDUNA TERRACE REGION, GREAT AUSTRALIAN BIGHT BASIN

The APPEA Journal ◽

10.1071/aj78007 ◽

1979 ◽

Vol 19 (1) ◽

pp. 53 ◽

Cited By ~ 4

Author(s):

A. R. Fraser ◽

L. A. Tilbury

Keyword(s):

Upper Cretaceous ◽

Single Channel ◽

South Australia ◽

Magnetic Data ◽

The West ◽

Petroleum Potential ◽

Northern Margin ◽

Gravity And Magnetic ◽

Gravity And Magnetic Data ◽

Great Australian Bight

The Ceduna Terrace is a bathymetric feature covering some 70,000 sq km, in the continental slope of South Australia. Its most gently sloping part lies between the 500 and 2500m isobaths, and is underlain by the main depocentre of the Great Australian Bight Basin.A systematic interpretation of the region has been made, based on 17,000 km of multi-channel seismic data from Shell surveys, 8000 km of single-channel seismic, gravity and magnetic data from the BMR Continental Margins Survey, and 6000 km of gravity and magnetic data from surveys by Lamont-Doherty Geological Observatory. Seismic ties were made to the wells Potoroo-1 and Platypus-1.Mapping of the key seismic horizons confirms the picture of the basin as a sedimentary wedge, more than 10 km thick, extending from the edge of the shelf to the continental rise. Three important unconformities can be mapped over a wide area and tied to Potoroo-1 well-a basement reflector separating Lower Proterozoic crystalline rocks of the Gawler Craton from an overlying, block-faulted sequence of mainly Lower to mid-Cretaceaus sediments; an unconformity at the base of an Upper Cretaceous sequence which includes a major prograded unit in the west; and a break-up unconformity at the base of a Tertiary marine transgressive sequence, that, in turn, is overlain by marine carbonate deposits. Widespread shallow marine sediments are believed to exist in the west of the basin, in both the Lower and Upper Cretaceous sequences.Structure is dominated by normal, west to NW trending, down-to-the-south faults, many of which are synsedimentary. Fault displacements are greatest beneath the shelf-break, where basement has been downthrown 5 to 6 km. Farther south, synsedimentary faulting has resulted in a marked thickening of both Upper and Lower Cretaceous sequences.The basin has been barely explored for hydrocarbons. Regional seismic coverage is good, but drilling in the main part of the basin is limited to one well on the northern margin. The petroleum potential of the western half of the basin is rated as good, in view of the interpreted existence of abundant marine source beds and the recognition of situations favourable for generation, migration and entrapment of hydrocarbons.

Download Full-text

Palynology, palynofacies and petroleum potential of the Upper Cretaceous–Eocene Matulla, Brown Limestone and Thebes formations, Belayim oilfields, central Gulf of Suez, Egypt

Journal of African Earth Sciences ◽

10.1016/j.jafrearsci.2014.03.013 ◽

2014 ◽

Vol 95 ◽

pp. 155-167 ◽

Cited By ~ 14

Author(s):

W.Sh. El Diasty ◽

S.Y. El Beialy ◽

A.A. Abo Ghonaim ◽

A.R. Mostafa ◽

H. El Atfy

Keyword(s):

Upper Cretaceous ◽

Gulf Of Suez ◽

Petroleum Potential

Download Full-text

STRUCTURE, STRATIGRAPHY, AND PETROLEUM POTENTIAL OF THE DEEPWATER COLOMBIAN BASIN, OFFSHORE NORTHERN COLOMBIA

Interpretation ◽

10.1190/int-2020-0028.1 ◽

2020 ◽

pp. 1-43 ◽

Cited By ~ 1

Author(s):

Stephen C. Leslie ◽

Paul Mann

Keyword(s):

Source Rock ◽

Upper Cretaceous ◽

Central Area ◽

Burial History ◽

Petroleum Potential ◽

Marine Shale ◽

Stratigraphic Model ◽

Basin Floor ◽

Seismic Reflectors ◽

Migration Pathways

We define the structure and stratigraphy of the central area of the Colombian Basin - offshore the northern Caribbean coast of Colombia - using ~8400 line km of depth-converted 2D seismic data assembled from academic and industry sources. We integrate information from offset DSDP and ODP wells into a structural and stratigraphic model of the Colombian Basin, identifying the key elements of a petroleum system. These elements are; 1) Upper Cretaceous marine shale source rock; 2) mid-to-upper Miocene (16 to 5.3 Ma) basin floor fans associated with the Magdalena Fan turbidite system; 3) structural traps and stratigraphic traps, and 4) sealing intervals formed by Miocene hemipelagic marine shale associated with sea level high-stands. We extend a previously recognized trap-type for the Colombian Margin to include stratigraphic traps within the distal Miocene Magdalena fan section. We base our interpretations upon seismic observations of amplitude anomalies conformant with structures, fluid migration pathways along faults, and bright, laterally continuous, and low-impedance seismic reflectors. The primary risk for the exploration potential of the area is the presence of a laterally extensive Upper Cretaceous source rock within the main Colombian basin depocenter. 1D burial history models and 3D basin modeling indicate that a source rock of this age and at this stratigraphic level would have expelled hydrocarbons during mid-to-late Miocene from the deepest part of the basin and may continue to expel hydrocarbons at the present-day.

Download Full-text

Petroleum potential of Kurgan region

Oil and Gas Studies ◽

10.31660/0445-0108-2021-3-9-24 ◽

2021 ◽

pp. 9-24

Author(s):

A. A. Arsenyev ◽

V. M. Alexandrov ◽

D. S. Leontiev

Keyword(s):

Industrial Development ◽

Upper Cretaceous ◽

Oil And Gas ◽

Early Carboniferous ◽

The West ◽

Hydrocarbon Production ◽

Petroleum Potential ◽

Hydrocarbon Reserves ◽

Comprehensive Study

The territory of Kurgan region is actually located within the boundaries of the West Siberian oil and gas province, where industrial reserves of hydrocarbons are discovered and actively developed within Tyumen, Omsk, Tomsk and Novosibirsk regions. The article presents an assessment of petroleum potential of Kurgan region (a case study of deposits of Early Carboniferous age, zones of serpentinization of ultrabasic rocks, as well as the Upper Cretaceous Suprasenomanian complex of rocks). It would seem that Kurgan region today could conduct industrial development of fields, because it neighboures upon those regions in which hydrocarbon production is carried out. However, oil or gas deposits in this region have not been discovered yet, and the study of the subsurface is discrete and unsystematic. The uncertainty in the fate of Kurgan oil is a legacy of Soviet geology. It is likely that large hydrocarbon reserves will not be found in Kurgan region, but there are forecast resources, and they cannot be confirmed without a comprehensive study of the subsurface. The authors of the article try to understand why an oil or gas fountain has not clogged in Kurgan region yet.

Download Full-text