Australian exploration review 2017

Seventy acreage grants were awarded in Australia during 2017, with net acreage increasing in the Canning, Bonaparte and Perth basins. More broadly, the area under licence within Australia has been reducing since 2014 and this trend continued with a reduction of just over 100 000 km2. Both 2D and 3D seismic acquisition levels decreased within Australia during 2017, on an absolute and on a percentage of worldwide basis. An uptick in exploratory drilling occurred in 2017 with the highest levels since 2014 being reached. Exploratory drilling levels in Australia also increased, in percentage terms, compared with those globally. Discovered volumes exhibited a sharp decrease with a total of 22 MMboe recoverable reserves added across 14 fields. In 2018, exploration activity is expected to increase with key wells planned in the North Carnarvon and Roebuck basins.

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PESA Australian exploration review 2018

The APPEA Journal ◽

10.1071/aj18284 ◽

2019 ◽

Vol 59 (2) ◽

pp. 493

Author(s):

D. Lockhart ◽

D. Spring

Keyword(s):

Oil And Gas ◽

Petroleum Exploration ◽

3D Seismic ◽

The North ◽

Second Year ◽

Gippsland Basin ◽

2D And 3D ◽

Conventional Oil ◽

Exploration Activity ◽

Offshore Petroleum

Available data for 2018 indicates that exploration activity is on the rise in Australia, compared to 2017, and this represents a second year of growth in exploration activity in Australia. There has been an increase in area under licence by 92 000 km2, reversing the downward trend in area under licence that commenced in 2014. Since 2016, exploratory drilling within Australia has seen a continued upward trend in both the number of wells drilled and the percentage of total worldwide. Onshore, 77 conventional exploration and appraisal wells were spudded during the year. Offshore, exploration and appraisal drilling matched that seen in 2017, with five new wells spudded: two in the Roebuck Basin, two in the Gippsland Basin and one in the North Carnarvon Basin. Almost 1500 km of 2D seismic and over 10 000 km2 of 3D seismic were acquired within Australia during 2018, accounting for 2.4% and 3.9% of global acquisition, respectively. This represents an increase in the amount of both 2D and 3D seismic acquired in Australia compared with 2017. Once the 2017 Offshore Petroleum Acreage Release was finalised, seven new offshore exploration permits were awarded as a result. A total of 12 bids were received for round one of the 2018 Offshore Petroleum Exploration Release, demonstrating an increase in momentum for offshore exploration in Australia. The permits are in Commonwealth waters off Western Australia, Victoria and the Ashmore and Cartier islands. In June 2018, the Queensland Government announced the release of 11 areas for petroleum exploration acreage in onshore Queensland, with tenders closing in February/March 2019; a further 11 areas will be released in early 2019. The acreage is a mix of coal seam gas and conventional oil and gas. Victoria released five areas in the offshore Otway Basin within State waters. In the Northern Territory, the moratorium on fracking was lifted in April, clearing the way for exploration to recommence in the 2019 dry season. With the increase in exploration has come an increase in success, with total reserves discovered within Australia during 2018 at just under 400 million barrels of oil equivalent, representing a significant increase from 2017. In 2018, onshore drilling resulted in 18 new discoveries, while offshore, two new discoveries were made. The most notable exploration success of 2018 was Dorado-1 drilled in March by Quadrant and Carnarvon Petroleum in the underexplored Bedout Sub-basin. Dorado is the largest oil discovery in Australia of 100 million barrels, or over, since 1996 and has the potential to reinvigorate exploration in the region.

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EXPLORATION HIGHLIGHTS FOR 2006

The APPEA Journal ◽

10.1071/aj06056 ◽

2007 ◽

Vol 47 (2) ◽

pp. 631

Author(s):

J.E. Blevin

Keyword(s):

Oil And Gas ◽

South Australia ◽

3D Seismic ◽

Market Demand ◽

South Wales ◽

Seismic Acquisition ◽

Almost All ◽

2D And 3D ◽

Exploration Activity ◽

Carnarvon Basin

Key business indicators show an upward trend in exploration activity in Australia during 2006. The year was marked by fluctuating high oil prices, a strong uptake of acreage in most basins, and increased levels of drilling activity and seismic acquisition. Market demand for product, production infrastructure and the fruition of several development projects have pushed the level of exploration activity in both offshore and onshore basins. Despite this trend and the spread of tenements, almost all petroleum discoveries made during 2006 were located within 15 km of existing (but often undeveloped) fields.The Carnarvon Basin continued to be the focus of most offshore exploration activity during 2006, with the highest levels of 3D seismic acquisition and exploration/appraisal/development drilling in the country. Discoveries in the Carnarvon Basin also covered the broadest range of water depths—extending from the oil and gas discoveries made by Apache on the inboard margin of the Barrow Subbasin, to the deepwater gas discoveries at Clio–1 and Chandon–1 by Chevron. Several large gas discoveries were made in the Carnarvon and Bonaparte basins and provide significant tie-back opportunities to existing and planned infrastructure. The Bonaparte Basin also saw significantly increased levels of 2D and 3D seismic acquisition during 2006. Onshore, the Cooper/Eromanga basins continued to experience the highest level of drilling activity and seismic acquisition, while maintaining an overall high drilling success rate. For the first time in many years, data acquisition also occurred in frontier basins like the Daly (Northern Territory), Darling (New South Wales), Tasmanian (Tasmania) and Faust/Capel basins (Lord Howe Rise region).Coal seam methane (CSM) exploration maintained a strong performance in 2006, particularly in Queensland, while South Australia, Queensland and Victoria continue to lead the way with large tracts of acreage gazetted for geothermal energy exploration.

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Quaternary evolution of the northern North Sea

10.5194/egusphere-egu2020-10118 ◽

2020 ◽

Author(s):

Christine Batchelor ◽

Dag Ottesen ◽

Benjamin Bellwald ◽

Sverre Planke ◽

Helge Løseth ◽

...

Keyword(s):

North Sea ◽

Seismic Data ◽

3D Seismic ◽

Quaternary Sediments ◽

The North ◽

The North Sea ◽

Data Coverage ◽

Northern North Sea ◽

2D And 3D ◽

3D Seismic Data

<p>The North Sea has arguably the most extensive geophysical data coverage of any glacier-influenced sedimentary regime on Earth, enabling detailed investigation of the thick (up to 1 km) sequence of Quaternary sediments that is preserved within the North Sea Basin. At the start of the Quaternary, the bathymetry of the northern North Sea was dominated by a deep depression that provided accommodation for sediment input from the Norwegian mainland and the East Shetland Platform. Here we use an extensive database of 2D and 3D seismic data to investigate the geological development of the northern North Sea through the Quaternary.</p><p>Three main sedimentary processes were dominant within the northern North Sea during the early Quaternary: 1) the delivery and associated basinward transfer of glacier-derived sediments from an ice mass centred over mainland Norway; 2) the delivery of fluvio-deltaic sediments from the East Shetland Platform; and 3) contourite deposition and the reworking of sediments by contour currents. The infilling of the North Sea Basin during the early Quaternary increased the width and reduced the water depth of the continental shelf, facilitating the initiation of the Norwegian Channel Ice Stream.</p>

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Identification of Osinsky horizon organogenic structures by 2D and 3D seismic survey data in the north-eastern part of the Nepa-Botuoba anteclise

Earth sciences and subsoil use ◽

10.21285/2686-9993-2021-44-1-30-38 ◽

2021 ◽

Vol 44 (1) ◽

pp. 30-38

Author(s):

R. S. Urenko ◽

A. G. Vakhromeev

Keyword(s):

Survey Data ◽

Lower Cambrian ◽

Seismic Survey ◽

3D Seismic ◽

Reservoir Properties ◽

The North ◽

Loose Packing ◽

North Eastern ◽

2D And 3D ◽

North Eastern Part

The fields of Eastern Siberia belong to the one of the main centers of hydrocarbon production in the eastern part of Russia. The main part of hydrocarbon reserves is located in the area within the Nepa-Botuoba anteclise, where the Lower Cambrian deposits are major production objects. The main purpose of this research is to provide a detailed study of the inner space and features of organogenic structures of the Cambrian period, as well as to determine the procedures for detecting reef structures by seismic research methods. Statistical processing of the available factual material on reservoir properties has shown a very uneven distribution of cavernosity (porosity). It is found that pores were formed as a result of leaching of shaped formations in loose packing locations of epigenetic dolomite grains, along the cementing substance in the intergranular spaces, along cracks and stylolite seams. To identify organogenic structures in the Osinsky horizon of the Nepa-Botuoba anteclise on the basis of seismic studies some additional methodologies have been selected. Identification of single reef structures in the Osinsky horizon of the Lower Cambrian based on the analysis of seismic amplitudes was carried out by means of a 2D and 3D seismic survey. According to the data of seismic studies, the Nepa-Botuoba anteclise features the development zones of both linear and single carbonate structures. It is also revealed that there is an increase in effective thicknesses in wells located in the annular anomaly. Summing up the results and analyzing the compared materials, it can be concluded that the main identification method of ring zones in wells is the method of longitudinal wave slowness measurement. A comprehensive analysis of 2D and 3D seismic survey data by the common depth point method as well as by a number of other methods using a specific algorithm allowed us to identify individual formations of organogenic (riphogenic) structures in the carbonate section of the north-eastern part of the Nepa-Botuoba anteclise.

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Malacca Strait 3D Seismic Survey – A Comprehensive Approach to Seismic Acquisition in Transition Zones

10.29118/ipa.1062.45 ◽

2018 ◽

Author(s):

W. O. Ardjakusumah

Keyword(s):

Comprehensive Approach ◽

Seismic Survey ◽

3D Seismic ◽

Transition Zones ◽

Seismic Acquisition ◽

Malacca Strait

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THE SEDIMENTOLOGICAL MODEL NEW ELEMENTS OF ACHIMOVSKY THICKNESS CLINOFORM SECTION LOCATED IN THE NORTH OF THE WESTERN SIBERIA BY THE 3D SEISMIC SURVEY DATA

Geology Geophysics and Development of Oil and Gas Fields ◽

10.30713/2413-5011-2018-11-4-12 ◽

2018 ◽

pp. 4-12

Author(s):

V.N. Borodkin ◽

◽

A.R. Kurchikov ◽

O.A. Smirnov ◽

A.V. Lukashov ◽

...

Keyword(s):

Survey Data ◽

Western Siberia ◽

Seismic Survey ◽

3D Seismic ◽

The North

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A hybrid approach for salt dome detection in 2D and 3D seismic data

2015 IEEE International Conference on Image Processing (ICIP) ◽

10.1109/icip.2015.7351260 ◽

2015 ◽

Cited By ~ 12

Author(s):

Asjad Amin ◽

Mohamed Deriche

Keyword(s):

Seismic Data ◽

Hybrid Approach ◽

Salt Dome ◽

3D Seismic ◽

2D And 3D ◽

3D Seismic Data

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The Forties and Brimmond Fields, Blocks 21/10, 22/6a, UK North Sea

Geological Society London Memoirs ◽

10.1144/gsl.mem.2003.020.01.45 ◽

2003 ◽

Vol 20 (1) ◽

pp. 557-561 ◽

Cited By ~ 4

Author(s):

A. Carter ◽

J. Heale

Keyword(s):

North Sea ◽

Low Cost ◽

New Technology ◽

Horizontal Wells ◽

Oil Price ◽

3D Seismic ◽

Rotary Drilling ◽

Geological Society ◽

Recoverable Reserves ◽

Infill Drilling

AbstractThis paper updates the earlier account of the Forties Field detailed in Geological Society Memoir 14 (Wills 1991), and gives a brief description of the Brimmond Field, a small Eocene accumulation overlying Forties (Fig. 1).The Forties Field is located 180 km ENE of Aberdeen. It was discovered in 1970 by well 21/10-1 which encountered 119 m of oil bearing Paleocene sands at a depth of 2131 m sub-sea. A five well appraisal programme confirmed the presence of a major discovery including an extension into Block 22/6 to the southeast. Oil-in-place was estimated to be 4600 MMSTB with recoverable reserves of 1800 MM STB. The field was brought onto production in September 1975. Plateau production of 500 MBOD was reached in 1978, declining from 1981 to 77 MBOD in 1999.In September 1992 a programme of infill drilling commenced, which continues today. The earlier infill targets were identified using 3D seismic acquired in 1988. Acquisition of a further 3D survey in 1996 has allowed the infill drilling programme to continue with new seismic imaging of lithology, fluids and saturation changes. The performance of the 1997 drilling showed that high step-out and new technology wells, including multi-lateral and horizontal wells, did not deliver significantly better targets than drilling in previous years.In line with smaller targets, and in the current oil price environment, low cost technology is being developed through the 1999 drilling programme. Through Tubing Rotary Drilling (TTRD) is currently seen as the most promising way of achieving a step

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Analysis of mortality from diarrheic diseases in under-five children in Brazilian cities with more than 150,000 inhabitants

Cadernos de Saúde Pública ◽

10.1590/s0102-311x2009000500016 ◽

2009 ◽

Vol 25 (5) ◽

pp. 1093-1102 ◽

Cited By ~ 9

Author(s):

Juraci Vieira Sergio ◽

Antônio Carlos Ponce de Leon

Keyword(s):

Mortality Rate ◽

Time Trends ◽

Sharp Decrease ◽

Mortality Rates ◽

The North ◽

Indicator Variables ◽

Before And After ◽

Geographic Regions ◽

Annual Mortality ◽

Children Under 5

This study analyzes mortality from infectious diarrheic diseases in children under 5 years of age in Brazilian municipalities with more than 150,000 inhabitants, excluding State capitals. The annual mortality rates by municipality from 1990 to 2000 were analyzed using a multilevel model, with years as first level units nested in municipalities as second level units. The dependent variable was the yearly mortality rate by municipality, on the log scale. Polynomial time trends and indicator variables to account for differences in geographic regions were used in the modeling. Time trends were centered on 1995, so they could be modeled differently before and after 1995. From 1990 to 1995 there was a sharp decrease in mortality rates by diarrheic diseases in most Brazilian municipalities, while from 1995 to 2000 the decrease was more heterogeneous. In 1995 the North and Northeast of Brazil had higher mortality rates than the Southeast, and the differences were statistically significant. Most importantly, the study concludes that there was an important difference in the pattern of mortality rate decreases over time, comparing the country's five geographic regions.

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