Comparative geological setting of conventional oil and gas fields and CSG resources in the Surat/Bowen Basin, Queensland

2009 ◽  
Vol 49 (2) ◽  
pp. 580
Author(s):  
Rob Willink
Keyword(s):  
Oil And Gas ◽  
Gas Content ◽  
Small Contribution ◽  
Coal Seams ◽  
Reservoir Properties ◽  
Oil And Gas Fields ◽  
The Difference ◽  
Permian Coal ◽  
Gas Fields ◽  
Coal Measures

The Surat/Bowen Basin has long been of interest to explorers in pursuit of gas and oil in conventional reservoirs. Some 500 BCF of gas and 32 million barrels of oil have been produced from sandstones of Permian, Triassic and Jurassic age. Geochemical evidence suggests that these hydrocarbons were sourced almost exclusively from Permian coal measures, though a small contribution from Triassic coals cannot be discounted. Primary interest in these basins today, however, resides in the exploration for, and commercialisation of, methane trapped in coal seams within the Permian and Jurassic successions. Total industry declared proven, probable and possible (3P) coal seam gas (CSG) reserves exceed 30 TCF, of which some 8 TCF are attributed to reserves in Permian coal seams, and 22 TCF in Jurassic coal seams. With particular reference to a representative regional seismic traverse through the basin, this presentation will explain why known conventional and CSG fields in these basins are located where they are from a regional structural and stratigraphic perspective. The difference between the reservoir properties of coals and sandstones, and between the Permian and Jurassic coals will be discussed in terms of their maceral composition, gas content, adsorption capacity and thermal maturity. In addition, the location of known sweetspots within CSG fairways will be revealed. The presentation will conclude with some speculative comments on what the future holds for both conventional and CSG exploration in these basins and will show that Origin Energy, in particular through its investment with Conoco Phillips in Australian Pacific LNG (APLNG), is well placed to participate in that future.

EXPLORATION IN THE COOPER BASIN

1989 ◽  
Vol 29 (1) ◽  
pp. 366 ◽  
Author(s):  
R. Heath
Keyword(s):  
Oil And Gas ◽  
South Australia ◽  
Mature Stage ◽  
Small Contribution ◽  
Terrestrial Source ◽  
Seismic Acquisition ◽  
Proterozoic Basement ◽  
Gas Fields ◽  
Coal Measures ◽  
Cooper Basin

The Cooper Basin is located in the northeastern corner of South Australia and in the southwestern part of Queensland. The basin constitutes an intracratonic depocentre of Permo- Triassic age. The Cooper Basin succession unconformably overlies Proterozoic basement as well as sediments and metasediments of the Cambro- Ordovician age. An unconformity separates in turn the Cooper succession from the overlying Jurassic- Cretaceous Eromanga Basin sediments.The Permo- Triassic succession comprises several cycles of fluvial sandstones, fluvio- deltaic coal measures and lacustrine shales. The coal measures contain abundant humic kerogen, comprising mainly inertinite and vitrinite with a small contribution of exinite. All hydrocarbon accumulations within the Cooper Basin are believed to have originated from these terrestrial source rocks.Exploration of the basin commenced in 1959 and, after several dry holes, the first commercial discovery of gas was made at Gidgealpa in 1963. To date, some 97 gas fields and 10 oil fields, containing recoverable reserves of 5 trillion cubic feet of gas and 300 million barrels recoverable natural gas liquids and oil, have been discovered in the Cooper Basin. Production is obtained from all sand- bearing units within the Cooper stratigraphic succession.The emphasis of exploration in the Cooper Basin is largely directed towards the assessment of four- way dip closures and three- way dip closures with fault control, but several stratigraphic prospects have been drilled. Furthermore, in the development phase of some gas fields a stratigraphic component of the hydrocarbon trapping mechanism has been recognised.Improvements in seismic acquisition and processing, combined with innovative thinking by the explorers, have facilitated the development of untested structural/stratigraphic plays with large reserves potential. Exploration for the four- and three- way dip closure plays in the Cooper Basin is now at a mature stage. However, reserves objectives are expected to continue to be met, with the expectation of a continuing high success rate.Selected new plays are expected to be tested within a continuing active exploration program as exploration for oil and gas in the Cooper Basin refines the search for the subtle trap.

The Influence of the Pipelines Operation Term in Aggressive Environments on the Gas Content and Structure of Structural Steels

2021 ◽  
Vol 313 ◽  
pp. 136-142
Author(s):  
V.D. Makarenko ◽  
T.P. Fedorina ◽  
O.V. Bezpala ◽  
S.Yu. Maksimov
Keyword(s):  
Oil And Gas ◽  
Gas Content ◽  
Mechanical Resistance ◽  
Surface Layers ◽  
Term Operation ◽  
Oil And Gas Fields ◽  
The Subject ◽  
Corrosion Defects ◽  
Gas Fields

X-ray structural studies have shown that with the increase of the life of the pipes, the surface layers of the metal adsorb a significant amount of gases (hydrogen, oxygen and sulfur), especially this is strongly manifested in the field of corrosion defects (ulcers, pitting). Also, it was found that in the process of long-term operation, the metal of the pipe walls is heavily flooded, which directly leads to its brittle and, as a consequence, increased hardness and reduced ductility. Such studies are unique in the subject of corrosion-mechanical resistance of metal and its degradation during long-term operation in the presence of alternating loads and at the same time, the aggressive environments of oil and gas fields.

QUANTITATIVE ANALYSIS OF THE RELATIONSHIP BETWEEN THE SIZE AND LOCATION OF OIL AND GAS FIELDS WITH GRAVITATIONAL ANOMALIES OF THE FERGANA DEPRESSION

2020 ◽  
Vol 2020 (3) ◽  
pp. 95-112
Author(s):  
R Umurzakov ◽  
◽  
S Rabbimkulov
Keyword(s):  
Oil And Gas ◽  
Gravity Anomalies ◽  
Geological Structure ◽  
Gas Content ◽  
Effective Volume ◽  
Oil And Gas Fields ◽  
Local Gravity ◽  
Gas Fields ◽  
The Impact ◽  
Gravitational Anomalies

Based on the analysis of published materials, it is noted that the degree of connection between the indicators of the anomalies of the gravitational field and oil and gas content remains unclear. The aim of the research was to study the nature of the dependence and assess the degree of connection between the size and location of oil and gas fields with gravitational anomalies using the example of the Fergana oil and gas region. To solve this problem, the published material on the geological structure and data on the sizes (effective volume) of deposits, as well as data on deep anomalies of the gravity field in the Fai reduction, were used. The study involved about 70 deposits. Analysis of variance showed that the “influence” of the deep anomaly factor on the effective volume of the fields in the Fergana depression is significant and reliable with a probability of 0.99. At the same time, the share of the influence of this factor on the effective volume of oil deposits in relation to the total impact of all factors is 42%, and for oil and gas - 62%. This testifies to the significant influence of deep subcrustal processes that create corresponding gravitational effects on the formation of the size and location of oil and gas fields in the Fergana depression. According to local gravity anomalies, the impact on the location and effective volumes of deposits is significant, but the reliability is low. The degree of influence on them remains unclear. The results obtained can be used to develop methods for forecasting promising areas for performing high-priority geological exploration works.

scholarly journals REGARDING REAL PROSPECTS FOR DISCOVERING NEW DEPOSITS AND INCREASING OIL AND GAS PRODUCTION IN THE WESTERN REGION OF UKRAINE

2019 ◽  
pp. 7-19
Author(s):  
L. S. Monchak ◽  
S.H. Anikeiev ◽  
G.O. Zhuchenko ◽  
T. V. Zderka ◽  
Yu. L. Monchak ◽  
...  
Keyword(s):  
Cross Sections ◽  
Oil And Gas ◽  
Gas Production ◽  
Gas Content ◽  
Western Region ◽  
Oil And Gas Production ◽  
Oil And Gas Exploration ◽  
Oil And Gas Fields ◽  
The Western Region ◽  
Gas Fields

The article deals with the research of the potential of oil-and-gas content within the Western Ukrainian oil and gas region.  The main directions and ways of increasing oil and gas production are determined. Consequently, the discovery of new hydrocarbon fields is the major direction to boost oil and gas production. The issue of the discovery of new oil and gas fields is suggested to divide into the following directions: a search for oil and gas fields at shallow depths (short-term prospect), a search for oil and gas fields at mid-depths and a search for oil and gas fields at great depths (the main prospects of increasing oil and gas production). The geological and geophysical data were thoroughly analyzed throughout structural and tectonic units within the Western region of Ukraine with the aim of substantiating the prospects of their oil-and-gas content and introduction of new directions of oil-and-gas exploration. The prospects of oil-and-gas content of the Neogene and the Mesozoic deposits of the exterior of the pre-Carpathian depression and flysch of the interior of the pre-Carpathian depression are provided. The prospects of oil-and-gas content of the Cretaceous and the Paleogene deposits of folded Carpathians are characterized. The promising directions for further oil-and-gas exploration within indicated tectonic elements of Carpathian region are identified; the top priority project sites are suggested. Wildcat drilling and further oil-and-gas exploration are strongly recommended for all identified project sites. The research has identified the most promising exploration project sites. All of them are illustrated with appropriate maps and cross-sections. Thus, the most promising ones at shallow depths (up to 2000 m) are the following ones: South-Slyvkinske, Anhelivka, Hoshiv and Verkhnii Hutyn elevations. At mid-depths there are Pechenizhyn, Kliuchiv, Uhilnia and Boratychi elevations. At depths over 4000 m there are the following ones: Horodyshche structure, Posada, Dubliany, South-Lopushnia, Biskiv, Sloboda-Dolyna and Mizhrichchia elevations, Pidrezhzhia and Dobromyl-Strilbychi structures. The assessment of the resource potential of identified exploration project sites was done.

scholarly journals Overview of Lower Cretaceous Achimov Formation: Physical Properties and Their Distribution Pattern in West Siberian Basin, Russia

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Mingyu He ◽  
Qingbin Xie ◽  
A. V. Lobusev ◽  
M. A. Lobusev ◽  
Xinping Liang
Keyword(s):  
Physical Properties ◽  
Oil And Gas ◽  
Distribution Patterns ◽  
Burial Depth ◽  
Reservoir Properties ◽  
Reservoir Rocks ◽  
Oil And Gas Fields ◽  
Genetic Mechanisms ◽  
Gas Fields ◽  
West Siberian Basin

The Achimov Formation is one of the most important oil- and gas-bearing strata in the West Siberian basin in Russia. The total estimated reserves of this stratum exceed one billion tons. The formation was first explored in 1981, but it remains largely underdeveloped due to its deep burial depth and poor physical properties. Therefore, further research on the genetic mechanisms and distribution characteristics of the reservoirs in the formation can contribute to its further exploitation. The Achimov Formation is dominated by of fine- to medium-grained sandstones interbedded with shale. Based on analysis of well logging data, hand specimens, and previous research, this study analyzed the properties of three members (Ach1, Ach2, and Ach3) of the Achimov Formation and summarized their distribution patterns. Research on reservoir rocks from different oil and gas fields reveals varying physical properties across the formation with permeability and porosity increasing from the northern to central areas and decreasing from the central to the southern areas. Burial depth is one of the major controlling factors for reservoir properties in the formation. Reservoirs in both the northern and southern parts of the formation are buried deeper than those in the central areas, resulting in a disparity in reservoir quality.

scholarly journals The geological structure and oil and gas content in the south-eastern part of Dniprovsko-Donetsk depression

2013 ◽  
pp. 72-76
Author(s):  
M. Dudnikov ◽  
S. Payuk
Keyword(s):  
Oil And Gas ◽  
Geological Structure ◽  
The State ◽  
Gas Content ◽  
The South ◽  
South Eastern ◽  
Oil And Gas Fields ◽  
Gas Fields

In this article the particularities of geological construction of the south-eastern part of Dniprovsko-Donetsk depression are considered. Within the framework of the article, the state of the geological study and results of the drilling boreholes are considered on Svyatogirska, Slavyanska and Artemivska areas. The further geological explorations will enable to discovered of the new oil and gas fields on this territory.   

CO2 Injection and Sequestration in Depleted Oil and Gas Fields and Deep Coal Seams: Worldwide Potential and Costs

2001 ◽  
Vol 8 (1) ◽  
pp. 200-209 ◽  
Author(s):  
Scott H. Stevens ◽  
Vello A. Kuuskraa ◽  
John Gale ◽  
David Beecy
Keyword(s):  
Oil And Gas ◽  
Co2 Injection ◽  
Coal Seams ◽  
Oil And Gas Fields ◽  
Gas Fields

On the electromagnetic response of complex pipeline infrastructure

Geophysics ◽  
2020 ◽  
Vol 85 (6) ◽  
pp. E241-E251
Author(s):  
Gurban Orujov ◽  
Ethan Anderson ◽  
Rita Streich ◽  
Andrei Swidinsky
Keyword(s):  
Electric Field ◽  
Oil And Gas ◽  
Petroleum Exploration ◽  
Electromagnetic Response ◽  
Pipeline System ◽  
Oil And Gas Fields ◽  
Field Distortion ◽  
The Difference ◽  
Gas Fields ◽  
Subsurface Resistivity

Controlled-source electromagnetics (CSEM) can be used to image subsurface resistivity and add value in petroleum exploration. However, the application of CSEM methods can be particularly challenging in mature oil and gas fields, where the presence of steel casings and complex seabed infrastructure may influence electromagnetic (EM) fields. The effect of this metal infrastructure can be modeled using the method of moments (MoM), which has previously been demonstrated to be effective in simple situations. We have now developed a methodology for modeling the EM response of complex pipeline geometry using MoM, and we validate our approach numerically and experimentally; the difference between finite-element and MoM modeling is less than 3%, whereas the difference between experimental data and MoM results is less than 30%. We further develop a fast and efficient approach to model the EM response of horizontal pipeline infrastructure. First, we create individual pipe sections of custom shape; when assembled, these sections are used to construct the entire pipeline system. We then identify “precise” and “approximate” zones based on how accurately we need to perform the calculations. We find that the electric field values in the approximate zone can be calculated accurately and quickly using previously saved table values, and therefore achieve a considerable reduction in computational requirements. Finally, we apply our methodology to a real situation of a 60 km horizontal seabed pipeline and find that the electric field distortion can be calculated rapidly and efficiently with our custom-built algorithm.

Geochemical remote searches of fields

2017 ◽  
Author(s):  
Серебряков ◽  
Oleg Serebryakov ◽  
Ушивцева ◽  
Lyubov Ushivtseva
Keyword(s):  
Spatial Variability ◽  
Oil And Gas ◽  
Chemical Compounds ◽  
Gas Content ◽  
Geochemical Processes ◽  
Oil And Gas Fields ◽  
Gas Fields

The main methods of geochemical searches of oil and gas fields at various stages of prospecting researches are given in work. the classification of geochemical methods of searches based on the directions of geochemical processes in deposits of oil and gas is given. Methods of gas shooting of superficial deposits and deep breeds are proved. Izdozhena types of bituminous and hydrochemical shootings. Methods of field geochemical works and modern technical means of geochemical researches are offered. Expediency of a kompleksirovaniye and interpretation of materials of various geochemical works is proved. Geochemical methods of searches of oil and gas fields (GPNG) are a component of a complex of the exploration works directed to identification and assessment of prospects of oil-and-gas content of the areas (regional and local elements of petrogeological division into districts) by remote methods on the basis of studying of regularities of spatial variability of fields of concentration of chemical compounds (mainly, UV-ny gases), the tipomorfnykh of elements, and microorganisms in the studied part stratisfer, hydrospheres and the atmospheres.

scholarly journals Study of the geochemical processes of radionuclides of oil and gas fields

2020 ◽  
Vol 177 ◽  
pp. 02002
Author(s):  
Tatyana Glushkova ◽  
Aleksei Kachkin ◽  
Ivan Nejmyshev ◽  
Aleksandr Talalaj ◽  
Irina Shinkaryuk
Keyword(s):  
Oil And Gas ◽  
Chemical Elements ◽  
Geochemical Processes ◽  
Radioactive Elements ◽  
Oil And Gas Fields ◽  
Measurement Results ◽  
Mass Fractions ◽  
Neutron Method ◽  
The Difference ◽  
Gas Fields

The objects of study of the geochemical processes of radionuclides are deposits of the West Siberian Plate, the distribution of radioactive elements in the areas of the Tyumen oil and gas region. In the process of work, the chemical composition of sedimentary rocks was investigated, and the mass fractions of uranium, radium, thorium, potassium, and other chemical elements were determined. Data on the distribution of radionuclides in individual wells and areas were considered, correlation diagrams of geochemical specificity were constructed. To determine the mass fractions of uranium, radium, thorium, potassium, and other chemical elements, gamma spectrometric, neutron activation, X-ray spectral, and laser-luminescent measurements were used. In order to control the measurement results, the determination of uranium in the samples was duplicated using the delayed neutron method in a specialized facility. The accuracy of uranium determination, estimated from independent measurements, was ~ 6.4% (rel.). The radioactive equilibrium is shifted towards uranium, which indicates an increase in the mass fractions of naturally radioactive elements in the raw of sandstones -sandstone-siltstone open pits - siltstones. The increase of the level of natural radioactivity in the direction from sandstones to siltstones is explained by the difference in brittleness between quartz and grains of active accessories, which indicates a stable ratio between radium and uranium in the sandstones-siltstones in relation to the considered areas of the Tyumen region.

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