PETROLEUM PROSPECTS OF TASMAN AND GOLDEN BAY AREAS, SOUTHERN COOK STRAIT, NEW ZEALAND

1965 ◽  
Vol 5 (1) ◽  
pp. 34
Author(s):  
R. C. Sprigg ◽  
W. F. Stockier ◽  
J. C. Braithwalte
Keyword(s):  
New Zealand ◽  
Structural Breaks ◽  
Gravity Anomalies ◽  
Oil Field ◽  
Small Scale ◽  
The West ◽  
Gas Field ◽  
Lower Tertiary ◽  
Cook Strait ◽  
West Basin

Petroliferous sediments of Lower Tertiary age are preserved in a number of sub-basins, basin synclines and graben along the western portions of both islands of New Zealand.These form part of the extensively disrupted lineal and platform-like Cretaceous-Tertiary "West Basin" or geosyncline which is separated from a comparable "East Geosyncline" by the geanticlinal backbone of the New Zealand island-chain.Sedimentation in the West Basin was thick (10,000 to 20,000 feet or more) and continuous throughout much of the Cretaceo- Tertiary interval. Unconformities, where present, tend to be local features, but may still represent marked erosional and/or structural breaks. Lithologic and facies changes are not infrequent on a small scale, but these are superimposed on regional sequences that are traceable over the full longitudinal extent of the overall basin.Cretaceous to Lower Tertiary sequences tend to be freshwater and coal-bearing, but may be "paralic" locally. More marine facies are predicted beneath Cook Strait. Later Tertiary sediments are more predominantly marine, and include big thicknesses of mudstone and limestone.Oil seepages occur in a number of situations in the West Basin, and are associated with Lower Tertiary coal measures. In the Taranaki sub-basin the small oil field at New Plymouth has produced a total of 200,000 barrels of oil and 65 million cubic feet of gas, while the more recently discovered (1959) Kapuni condensate-gas field is capable of producing 60 million cubic feet of gas per day, of which 40 per cent is CO, accompanied initially by 4,500 million barrels per day of condensate.The Nelson and Farewell Spit sub-basins of present interest respectively plunge north beneath Tasman and Golden Bays on either side of the Pikikirunl Range "horst". They then coalesce beyond Separation Point and link with the Kapuni sub-basin beneath Cook Strait as part of the modern continental shelf. These graben-like developments are characterised by strong north plunge.Geophysical surveys leading to the better understanding of basin sub-structure about southern Cook Strait are discussed, followed by consideration of possible petroleum potential. Gravity anomalies in both the Tasman and Golden Bay areas, supported by seismic surveys, have confirmed anticlinal structure. Structural and stratigraphic traps for petroleum are predicted in relation particularly to these developments.

Geological Interpretation of Airborne Magnetometer Observations from Nelson to Waikato River, New Zealand

1959 ◽  
Vol 96 (2) ◽  
pp. 118-124 ◽  
Author(s):  
H. W. Wellman
Keyword(s):  
New Zealand ◽  
West Coast ◽  
Axial Plane ◽  
Igneous Rocks ◽  
The South ◽  
The West ◽  
Geological Interpretation ◽  
The North ◽  
Cook Strait ◽  
Waikato River

AbstractA map is presented showing a series of airborne magnetometer profiles from the north end of the South Island of New Zealand to the mouth of Waikato River. The two southern profiles are related to the exposed Upper Palaeozoic igneous rocks which are considered to extend north across Cook Strait and along the west coast of the North Island to cause the anomalies in the northern profiles. The North Island profiles are considered to reflect the Kawhia Syncline and a major anticline to the east. The eastward displacement of the magnetic low relative to the synclinal axis at the surface is considered due to the eastward dip of the axial plane of the syncline.

OFFSHORE PETROLEUM POTENTIAL IN NEW ZEALAND

1974 ◽  
Vol 14 (1) ◽  
pp. 3
Author(s):  
H. R. Katz
Keyword(s):  
New Zealand ◽  
Sedimentary Basins ◽  
The South ◽  
The West ◽  
Gas Field ◽  
Petroleum Potential ◽  
The North ◽  
Depth Contour ◽  
Tectonic Disturbances ◽  
Marine Seismic

Extensive shelves and intermediate-depth terraces, rises, and plateaus characterize the New Zealand offshore region. Sedimentary basins with hydrocarbon potential on land, which all have formed after the Early Cretaceous Rangitata Orogeny, are mainly lined up along the west and east of both islands and obviously extend out to sea. Sediment thickness generally increases offshore, while the tectonic disturbances become markedly less severe. Prospects therefore look favourable, and on this basis offshore concessions to a total of nearly 400,000 sq. miles were taken up, covering the area all around New Zealand to a depth of 1,000 m. Ten offshore wells to an average depth of 10,000 ft have been drilled, the second, third and fourth of which establishing a large gas field with an estimated 5 trillion cu. ft of gas, and the seventh being a non-commercial oil discovery (tested flow rate 600 b/d). Marine seismic surveys have been done over about 80,000 line miles. However, the results indicate that in many areas maximum subsidence during the Tertiary occurred relatively close to the present landmass, whereas farther away on submarine rises and plateaus the basement is very shallow or even exposed; also nearer to land some areas have little or no prospects. Consequently, 70,000 sq. miles have been relinquished-with only one well here drilled-and more acreage will probably be relinquished in the near future. But the overall potential still is encouraging; interesting prospects remain particularly along the west coast within the 500 m depth contour and extending from about 35° to 44°, also along the east coast of the North Island, on the eastern half of Chatham Rise, in the south -east of the South Island south of Christchurch and towards the central depression of Campbell Plateau, and in the head of Solander Trough. These areas amount to about 100,000 sq. miles. Concessions totalling 50,000 sq. miles (which for the greater part lie within the above areas) are in their second 5-year term and will expire on 30 September 1975; until then, more drilling is expected to outline existing prospects in greater detail. There is reasonable hope for further discoveries of substantial petroleum accumulations.

Automatic Milking Systems: an option to address the labour shortage on New Zealand dairy farms?

2002 ◽  
pp. 39-43
Author(s):  
J.G. Jago ◽  
M.W. Woolford
Keyword(s):  
New Zealand ◽  
Dairy Industry ◽  
Research Programme ◽  
Working Hours ◽  
Dairy Farms ◽  
Small Scale ◽  
Labour Shortage ◽  
Commercial Farms ◽  
Grazing Systems ◽  
Automatic Milking Systems

There is a growing shortage of labour within the dairy industry. To address this the industry needs to attract more people and/or reduce the labour requirements on dairy farms. Current milk harvesting techniques contribute to both the labour requirements and the current labour shortage within the industry as the process is labour-intensive and necessitates long and unsociable working hours. Automated milking systems (AMS) have been in operation, albeit on a small scale, on commercial farms in Europe for a decade and may have the potential to address labour issues within the New Zealand dairy industry. A research programme has been established (The Greenfield Project) which aims to determine the feasibility of automated milking under New Zealand dairying conditions. A Fullwoods MERLIN AMS has been installed on a protoype farmlet and is successfully milking a small herd of 41 cows. Progress from the prototype Greenfields system offers considerable potential for implementing AMS in extensive grazing systems. Keywords: automated milking systems, dairy cattle, grazing, labour

Petroleum geology of the West Siberian Basin and a detailed description of the Samotlor oil field

1977 ◽  
Author(s):  
James W. Clarke ◽  
O.W. Girard ◽  
James Peterson ◽  
Jack Rachlin
Keyword(s):  
Oil Field ◽  
Petroleum Geology ◽  
The West ◽  
West Siberian Basin

scholarly journals Whole-genome sequencing from the New Zealand Saccharomyces cerevisiae population reveals the genomic impacts of novel microbial range expansion

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Peter Higgins ◽  
Cooper A Grace ◽  
Soon A Lee ◽  
Matthew R Goddard
Keyword(s):  
Saccharomyces Cerevisiae ◽  
New Zealand ◽  
Whole Genome Sequencing ◽  
Genome Sequencing ◽  
Range Expansion ◽  
Copy Number ◽  
Small Scale ◽  
Whole Genome ◽  
Copy Number Changes ◽  
The Impact

Abstract Saccharomyces cerevisiae is extensively utilized for commercial fermentation, and is also an important biological model; however, its ecology has only recently begun to be understood. Through the use of whole-genome sequencing, the species has been characterized into a number of distinct subpopulations, defined by geographical ranges and industrial uses. Here, the whole-genome sequences of 104 New Zealand (NZ) S. cerevisiae strains, including 52 novel genomes, are analyzed alongside 450 published sequences derived from various global locations. The impact of S. cerevisiae novel range expansion into NZ was investigated and these analyses reveal the positioning of NZ strains as a subgroup to the predominantly European/wine clade. A number of genomic differences with the European group correlate with range expansion into NZ, including 18 highly enriched single-nucleotide polymorphism (SNPs) and novel Ty1/2 insertions. While it is not possible to categorically determine if any genetic differences are due to stochastic process or the operations of natural selection, we suggest that the observation of NZ-specific copy number increases of four sugar transporter genes in the HXT family may reasonably represent an adaptation in the NZ S. cerevisiae subpopulation, and this correlates with the observations of copy number changes during adaptation in small-scale experimental evolution studies.

A Red Water Bloom of Rotifers in Cook Strait, New Zealand

Nature ◽  
1960 ◽  
Vol 186 (4721) ◽  
pp. 328-329 ◽  
Author(s):  
VIVIENNE CASSIE
Keyword(s):  
New Zealand ◽  
Water Bloom ◽  
Cook Strait

A novel exploration technique using the microbial fingerprint of shallow sediment to detect hydrocarbon microseepage and predict hydrocarbon charge — An Argentinian case study

2021 ◽  
pp. 1-79
Author(s):  
Alin G. Chitu ◽  
Mart H. A. A. Zijp ◽  
Jonathan Zwaan
Keyword(s):  
Machine Learning ◽  
Oil Field ◽  
Dna Fingerprint ◽  
Evolutionary Constraint ◽  
Technology Study ◽  
Gas Field ◽  
Hydrocarbon Microseepage ◽  
Hydrocarbon Charge ◽  
Abundance And Distribution

The fundamental assumption of many successful geochemical and geomicrobial technologies developed in the last 80 years is that hydrocarbons leak from subsurface accumulations vertically to the surface. Driven by buoyancy, the process involves sufficiently large volumes directly measurable or indirectly inferable from their surface expressions. Even when the additional hydrocarbons are not measurable, their presence slightly changes the environment, where complex microbial communities live, and acts as an evolutionary constraint on their development. Since the ecology of this ecosystem is very complicated, we propose to use the full-microbiome analysis of the shallow sediments samples instead of targeting a selected number of known species, and the use of machine learning for uncovering the meaningful correlations in these data. We achieve this by sequencing the microbial biomass and generating its “DNA fingerprint”, and by analyzing the abundance and distribution of the microbes over the dataset. The proposed technology uses machine learning as an accurate tool for determining the detailed interactions among the various microorganisms and their environment in the presence or absence of hydrocarbons, thus overcoming data complexity. In a proof-of-technology study, we have taken more than 1000 samples in the Neuqu謠Basin in Argentina over three distinct areas, namely, an oil field, a gas field, and a dry location outside the basin, and created several successful predictive models. A subset of randomly selected samples was kept outside of the training set and blinded by the client operator, providing the means for objectively validating the prediction performance of this methodology. Uncovering the blinded dataset after estimating the prospectivity revealed that most of these samples were correctly predicted. This very encouraging result shows that analyzing the microbial ecosystem in the shallow sediment can be an additional de-risking method for assessing hydrocarbon prospects and improving the Probability Of Success(POS) of a drilling campaign.

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