Hydrocarbon charge history of the Gippsland Basin

2010 ◽  
Vol 50 (2) ◽  
pp. 729
Author(s):  
Keyu Liu ◽  
Peter Eadington ◽  
David Mills ◽  
Richard Kempton ◽  
Herbert Volk ◽  
...  
Keyword(s):  
System Analysis ◽  
Evaluation Research ◽  
Petroleum System ◽  
Additional Information ◽  
Oil Generation ◽  
History Of ◽  
And Migration ◽  
Hydrocarbon Charge ◽  
Gas Fields ◽  
Gippsland Basin

As part of a larger petroleum system analysis and resource re-evaluation research program in the Gippsland Basin, over 400 samples from 29 selected wells in the Gippsland Basin were investigated using quantitative fluorescence techniques developed by CSIRO Petroleum, including the quantitative grain fluorescence (QGF) and QGF on extracts (QGF-E) and the total scanning fluorescence (TSF) techniques. Preliminary results have provided new insight into the hydrocarbon migration and charge history of the Gippsland Basin. The investigation has revealed: widespread occurrence of palaeo oil columns in some of the major gas fields, indicating that a significant amount of oil was charged into these reservoirs prior to a subsequent gas accumulation; that some of the current oil intervals appear to have received a relatively late oil charge, either through new charge or through palaeo oil re-distribution due to adjustments within the petroleum system; palaeo oil columns appear to be restricted to a certain distance range from the major source kitchens; and, evidence of a sequential oil migration and displacement along structural highs where reservoirs distal to the source kitchens received progressively lighter and more mature palaeo oils. These findings are consistent with the oil generation and migration model proposed by O’Brien et al (2008). Fluid inclusion petrographic investigations and molecular composition of inclusions (MCI) analysis are currently underway that will provide additional information on the hydrocarbon charge history in the Gippsland Basin.

PATTERNS OF DIAGENESIS IN SOME AUSTRALIAN SEDIMENTARY BASINS

1977 ◽  
Vol 17 (1) ◽  
pp. 58 ◽  
Author(s):  
M. Shibaoka ◽  
A. J. R. Bennett
Keyword(s):  
Sedimentary Basins ◽  
Hydrocarbon Generation ◽  
Liquid Hydrocarbons ◽  
Geological Time ◽  
Oil Generation ◽  
History Of ◽  
And Migration ◽  
Gippsland Basin ◽  
Reflectance Data ◽  
Generation Activity

Three characteristic types of Australian sedimentary basins can be recognized on the basis of depth-reflectance curves. These may be designated as the Cooper, Sydney, and Gippsland Basin types. Characteristic depth-reflectance curves allow an assessment of the depositional and tectonic histories of sedimentary basins to be made. If the geological history and especially the stratigraphy of a basin is well known, it is possible to estimate the maturity which coal or kerogen would have attained at any past or present time. This maturity would be expressed by particular reflectance values of vitrinite. By making actual measurements of vitrinite and kerogen reflectance, the model of maturation can be tested. In this way it has been possible, for a number of basins, to estimate the geological period in which liquid hydrocarbons were generated and the rate at which the maturation process proceeded. The formation of an accumulation of oil is a matter of balance between the supply and loss of oil to and from traps, as well as persistence of traps and migration paths through geological time. The lapse of time after oil generation and the rate of generation are thus most important. The above-mentioned three types of sedimentary basins differ in these respects. Reflectance data can therefore be used not only to estimate the present state of organic maturity, but also in conjunction with the history of sedimentation in the basin, to interpret hydrocarbon generation activity in geological time.

A reassessment of the petroleum systems in the offshore northern Perth Basin

2013 ◽  
Vol 53 (2) ◽  
pp. 427
Author(s):  
Emmanuelle Grosjean ◽  
Chris Boreham ◽  
Andrew Jones ◽  
Diane Jorgensen ◽  
John Kennard
Keyword(s):  
Primary Source ◽  
Petroleum System ◽  
Source Rocks ◽  
Early Triassic ◽  
Widespread Occurrence ◽  
Petroleum Systems ◽  
Oil Generation ◽  
History Of ◽  
Effective Source ◽  
Commercial Oil

The discovery of commercial oil in the Cliff Head-1 well in 2001 set an important milestone in the exploration history of the offshore northern Perth Basin. The region had been less explored before then, partly due to the perception that the main source of onshore petroleum accumulations, the Late Permian-Early Triassic Hovea Member, had only marginal potential offshore. The typing of the Cliff Head oil to the Hovea Member provided evidence that the key onshore petroleum system extends offshore and has revitalised exploration with 13 new field wildcat wells drilled since 2002. A reassessment of the hydrocarbon generative potential in the offshore northern Perth Basin confirms the widespread occurrence of good to excellent oil-prone Hovea Member source rocks in the Beagle Ridge and Abrolhos Sub-basin. The Early Permian Irwin River Sequence and several Jurassic Sequences are also recognised as prime potential source rocks offshore, mostly for their gas-generative potential. The unique hydrocarbon assemblages exhibited by the Hovea Member extracts are shared by the oils recovered from Permian reservoirs in the offshore Cliff Head-3 and Dunsborough-1 wells, indicating the Hovea Member as the primary source charging these accumulations. Geochemical correlation of oil stains from Hadda-1 and as far north as Livet-1 provides evidence for a working Early Triassic petroleum system across much of the Abrolhos Sub-basin. In this area, the Hovea Member was shown to be both of limited quality and only marginally mature for oil generation, which suggests the occurrence of effective source kitchens in the adjacent Houtman Sub-basin.

Understanding the plumbing of the Gippsland Basin: new results on fluid migration and reservoir quality

2011 ◽  
Vol 51 (2) ◽  
pp. 693
Author(s):  
Peter Tingate ◽  
Monica Campi ◽  
Geoffrey O'Brien ◽  
John Miranda ◽  
Louise Goldie Divko ◽  
...  
Keyword(s):  
Co2 Storage ◽  
Fluid Migration ◽  
Gas Field ◽  
Reservoir Characteristics ◽  
Petroleum Systems ◽  
Migration History ◽  
History Of ◽  
Hydrocarbon Charge ◽  
Gippsland Basin ◽  
Migration Pathways

Understanding the CO2 storage potential and petroleum prospectivity of the Gippsland Basin are critical to managing the resources of this region. Key controls on determining the prospectivity for CO2 storage and petroleum include understanding the fluid migration history and reservoir characteristics in the basin. Gippsland Basin hydrology, reservoir characteristics and petroleum systems are being studied to better understand how CO2 can be safely stored in the subsurface. Hydrocarbon migration pathways have been delineated using petroleum systems modelling. The latest hydrocarbon charge history data has been acquired to test the containment potential of individual structures along these migration pathways. The charge history results indicate the Golden Beach gas field has had a complex hydrocarbon fill history, and that early charge has migrated through the regional seal. The results also indicate that early oil charge was very common in the basin, including large structures that are now filled with gas (e.g. Barracouta). The results allow the regions with good CO2 containment potential to be delineated for further storage investigations. A new evaluation of the reservoir characteristics of the Latrobe Group—through porosity/permeability analysis and automated mineral analysis (AMA)—has provided insights into CO2 injectivity and capacity. The AMA results constrain the mineralogy and diagenetic history of the reservoirs and seals. In addition, the data highlights the presence of carbonates, glauconite and K-feldspar that are potentially reactive with injected CO2.

Intraocular tuberculosis, a challenge in diagnosis and treatment

2020 ◽  
Vol 3 ◽  
pp. 4
Author(s):  
Martina Larroude ◽  
Gustavo Ariel Budmann
Keyword(s):  
Developing Countries ◽  
Clinical Signs ◽  
Steady Increase ◽  
Ocular Tuberculosis ◽  
Industrial Countries ◽  
Choroidal Granuloma ◽  
History Of ◽  
And Migration ◽  
Ocular Tb

Ocular tuberculosis (TB) is an extrapulmonary tuberculous condition and has variable manifestations. The incidence of TB is still high in developing countries, and a steady increase in new cases has been observed in industrial countries as a result of the growing number of immunodeficient patients and migration from developing countries. Choroidal granuloma is a rare and atypical location of TB. We present a case of a presumptive choroidal granuloma. This case exposes that diagnosis can be remarkably challenging when there is no history of pulmonary TB. The recognition of clinical signs of ocular TB is extremely important since it provides a clinical pathway toward tailored investigations and decision making for initiating anti-TB therapy and to ensure a close follow-up to detect the development of any complication.

Petroleum Systems Analysis of The Tungkal PSC Area, South Sumatra – A Means of Adding New Life to A Mature Area

2020 ◽  
Author(s):  
A. Livsey
Keyword(s):  
Seismic Data ◽  
Systems Analysis ◽  
Generation Model ◽  
Hydrocarbon Accumulation ◽  
Petroleum Systems ◽  
Oil Generation ◽  
Exploration Risk ◽  
Exploration Area ◽  
Hydrocarbon Charge ◽  
Surface Geology

South Sumatra is considered a mature exploration area, with over 2500MMbbls of oil and 9.5TCF of gas produced. However a recent large gas discovery in the Kali Berau Dalam-2 well in this basin, highlights that significant new reserve additions can still be made in these areas by the re-evaluation of the regional petroleum systems, both by identification of new plays or extension of plays to unexplored areas. In many mature areas the exploration and concession award history often results in successively more focused exploration programmes in smaller areas. This can lead to an increased emphasis on reservoir and trap delineation without further evaluation of the regional petroleum systems and, in particular, the hydrocarbon charge component. The Tungkal PSC area is a good example of an area that has undergone a long exploration history involving numerous operators with successive focus on block scale petroleum geology at the expense of the more regional controls on hydrocarbon prospectivity. An improved understanding of hydrocarbon accumulation in the Tungkal PSC required both using regional petroleum systems analysis and hydrocarbon charge modelling. While the Tungkal PSC operators had acquired high quality seismic data and drilled a number of wells, these were mainly focused on improving production from the existing field (Mengoepeh). More recent exploration-driven work highlighted the need for a new look at the hydrocarbon charge history but it was clear that little work had been done in the past few year to better understand exploration risk. This paper summarises the methodology employed and the results obtained, from a study, carried out in 2014-15, to better understand hydrocarbon accumulation within the current Tungkal PSC area. It has involved integration of available well and seismic data from the current and historical PSC area with published regional paleogeographic models, regional surface geology and structure maps, together with a regional oil generation model. This approach has allowed a better understanding of the genesis of the discovered hydrocarbons and identification of areas for future exploration interest.

scholarly journals Mixed neuroendocrine–non-neuroendocrine neoplasms of the gallbladder: a case report

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Tatsuki Ishikawa ◽  
Katsunori Nakano ◽  
Masafumi Osaka ◽  
Kenichi Aratani ◽  
Kadotani Yayoi ◽  
...  
Keyword(s):  
System Analysis ◽  
Cancer Control ◽  
Staging System ◽  
Neuroendocrine Neoplasms ◽  
Ki 67 ◽  
Regional Lymph Nodes ◽  
Abdominal Ultrasonography ◽  
Case Presentation ◽  
History Of ◽  
Lymph Nodes Dissection

Abstract Background  Primary neuroendocrine tumors of the gallbladder (GB-NETs) are rare, accounting for 0.5% of all NETs and 2.1% of all gallbladder cancers. Among GB-NETs, mixed neuroendocrine–non-neuroendocrine neoplasms of the gallbladder (GB-MiNENs) are extremely rare. Case presentation We present the case of a 66-year-old woman who was referred to us for the management of a gallbladder tumor (incidentally found during abdominal ultrasonography indicated for gallbladder stones). The patient had no history of abdominal pain or fever, and the findings on a physical examination were unremarkable. Blood tests showed normal levels of tumor markers. Imaging studies revealed a mass of approximately 10 mm in diameter (with no invasion of the gallbladder bed) located at the fundus of the gallbladder. A gallbladder cancer was suspected. Therefore, an open whole-layer cholecystectomy with regional lymph nodes dissection was performed. The postoperative course was uneventful, and she was discharged on postoperative day 6. Pathological findings showed GB-MiNENs with invasion of the subserosal layer and no lymph node invasion (classified T2aN0M0 pStage IIA according to the Union for International Cancer Control, 8th edition staging system). Analysis of the neuroendocrine markers revealed positive chromogranin A and synaptophysin, and a Ki-67 index above 95%. Fourteen months after the operation, a local recurrence was detected, and she was referred to another hospital for chemotherapy. Conclusions  GB-MiNENs are extremely aggressive tumors despite their tumor size. Optimal therapy should be chosen for each patient.

scholarly journals Prospects of Using Hydrocarbon Deposits from the Autochthonous Miocene Formation (Eastern Carpathian Foredeep, Poland) for Geothermal Purposes

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3102
Author(s):  
Anna Chmielowska ◽  
Anna Sowiżdżał ◽  
Barbara Tomaszewska
Keyword(s):  
Oil And Gas ◽  
Geothermal System ◽  
Vast Number ◽  
Hydrocarbon Traps ◽  
Oil And Gas Fields ◽  
Geothermal Potential ◽  
Carpathian Foredeep ◽  
And Migration ◽  
Gas Fields ◽  
Geothermal Parameters

There are many oil and gas fields around the world where the vast number of wells have been abandoned or suspended, mainly due to the depletion of reserves. Those abandoned oil and gas wells (AOGWs) are often located in areas with a prospective geothermal potential and might be retrofitted to a geothermal system without high-cost drilling. In Poland, there are thousands of wells, either operating, abandoned or negative, that might be used for different geothermal applications. Thus, the aim of this paper is not only to review geothermal and petroleum facts about the Eastern Carpathian Foredeep, but also to find out the areas, geological structures or just AOGWs, which are the most prospective in case of geothermal utilization. Due to the inseparability of geological settings with both oil and gas, as well as geothermal conditionings, firstly, the geological background of the analyzed region was performed, considering mainly the autochthonous Miocene formation. Then, geothermal and petroleum detailed characteristics were made. In the case of geothermal parameters, such as formation’s thickness, temperatures, water-bearing horizons, wells’ capacities, mineralization and others were extensively examined. Considering oil and gas settings, insights into reservoir rocks, hydrocarbon traps and migration paths issues were created. Then, for evaluating geothermal parameters for specific hydrocarbon reservoirs, their depths were established based on publicly available wells data. Thereafter, the average temperatures for selected reservoirs were set. As the effect, it turned out that most of the deposits have average temperatures of 40/50 °C, nonetheless, there are a few characterized by higher (even around 80 °C) temperatures at reasonable depths.

Abstract WP266: Microembolic Signals and Association With Stroke Etiology in Ischemic Stroke

Stroke ◽  
2020 ◽  
Vol 51 (Suppl_1) ◽  
Author(s):  
Michael M Chen ◽  
Simin Mahinrad ◽  
Arth K Srivastava ◽  
Eric Liotta ◽  
Richard A Bernstein ◽  
...  
Keyword(s):  
Small Vessel Disease ◽  
Transcranial Doppler Ultrasound ◽  
Small Vessel ◽  
Stroke Recurrence ◽  
Additional Information ◽  
Vessel Disease ◽  
Stroke Etiology ◽  
Chi Squared ◽  
Prognostic Utility ◽  
History Of

Background: Microembolic signals (MES) detected by the transcranial Doppler ultrasound (TCD) have established prognostic value for stroke recurrence in patients with carotid stenosis. However, the frequency of MES in the context of other stroke etiologies remains unknown. Methods: All stroke admissions to Northwestern Memorial hospital between 2016-2018 who underwent TCD within the first 48 hours of admission were reviewed. Final stroke diagnosis was extracted from chart review. Presence or absence of MES was extracted from clinical TCD reports. Frequency of stroke etiology among MES groups were compared using chi-squared test. Results: A total of 789 patient charts were reviewed (mean age 62±17 years, 55% male). MES were present in 95 patients. Demographics and medical history of patients were not different among those with and without MES. Compared to patients without MES, those with MES were more frequently diagnosed with cardioembolic stroke (36.4% vs 21%, p =0.001) and less frequently with small vessel disease stroke (5.7% vs 24%, p <0.001). However, there was no difference in the frequency of cryptogenic strokes between patients with and without MES ( p =0.844). Among patients with MES, the most frequent etiologies of stroke were cardioembolic (36.4%), cryptogenic (19.3%), large vessel disease (17.1%), and small vessel disease (5.7%). Conclusion: TCD detection of MES is seen across all stroke subtypes and may provide additional information for risk stratification in secondary stroke prevention. We are currently reviewing the prognostic utility of MES for stroke recurrence in this cohort.

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