scholarly journals CLASTIC HETEROFACIAL SEDIMENTS IN THE SEDIMENTARY COMPLEXES OF THE SOUTHERN OIL AND GAS REGION OF UKRAINE

2020 ◽  
Vol 16 (4) ◽  
pp. 41-48
Author(s):  
O.D. Naumenko
Keyword(s):  
Oil And Gas ◽  
Morphological Structure ◽  
Field Studies ◽  
Geophysical Field ◽  
Clastic Rocks ◽  
Hydrocarbon Reservoir ◽  
Hydrocarbon Traps ◽  
Wide Range ◽  
First Time ◽  
Gas Bearing

In this article the author carried out sedimentary and genetic modeling of facies parameters within heterogeneous geological bodies based on the analysis of geological and geophysical materials in the Southern Ukrainian oil and gas region. Special attention was paid to clastic facies and parameters demonstrating the degree of heterogeneity and a wide range of facial settings of the sedimentation basin. The data from lithological, geochemical, and geophysical field studies of wells was interpreted to predict hydrocarbon traps. This resulted in the facial diagnostic of the groups of geological bodies of clastic rocks coexisting with sediments of both tectonic and ridge morphological structure of the study area. Such diagnostics allowed us to build a prognostic lithologicfacial (sedimentation) section. Based on the modeling of the Vendian top (Vendian is a stratigraphic unit partially corresponding to Ediacaran) and the Jurassic base, a schematic map of the Paleozoic sediments was constructed for the first time, which made it possible to identify zones of the potential distribution of the former reef structures. The article presents the spatial forecast of hydrocarbon reservoir distribution in geological bodies of oil and gas bearing complexes within the PreDobruja Trough. The data allow forecasting a large number of traps, mainly small ones, formed by clusters of cavernous dolomites, limestones, and mixed rocks confined to certain cyclical elements and, in particular, associated with diastems. Most of such traps are caused by metasomatic dolomitization and paleokarst.

Energy Harvesting Under Harsh Conditions for the Oil & Gas Upstream Industry

2021 ◽  
Author(s):  
José Correia ◽  
Cátia Rodrigues ◽  
Ricardo Esteves ◽  
Ricardo Cesar Bezerra de Melo ◽  
José Gutiérrez ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Oil And Gas ◽  
Electrical Energy ◽  
Development Stage ◽  
Gas Extraction ◽  
Power Monitoring ◽  
Operational Conditions ◽  
Wide Range ◽  
First Time ◽  
Harsh Conditions

Abstract Environmental and safety sensing is becoming of high importance in the oil and gas upstream industry. However, present solutions to feed theses sensors are expensive and dangerous and there is so far no technology able to generate electrical energy in the operational conditions of oil and gas extraction wells. In this paper it is presented, for the first time in a relevant environment, a pioneering energy harvesting technology based on nanomaterials that takes advantage of fluid movement in oil extraction wells. A device was tested to power monitoring systems with locally harvested energy in harsh conditions environment (pressures up to 50 bar and temperatures of 50ºC). Even though this technology is in an early development stage this work opens a wide range of possible applications in deep underwater environments and in Oil and Gas extraction wells where continuous flow conditions are present.

Browse to Bonaparte stratigraphic evaluation

2013 ◽  
Vol 53 (2) ◽  
pp. 483
Author(s):  
Marcus Lemberger ◽  
James Stockley ◽  
Tim Gibbons
Keyword(s):  
Depositional Environment ◽  
Oil And Gas ◽  
Structural Evolution ◽  
North West ◽  
Integrated Environment ◽  
Public Data ◽  
Wide Range ◽  
Well Data ◽  
The Uk ◽  
Gas Bearing

After an initial 2010 stratigraphic, depositional environment and facies determination study of 75 wells in the Browse Basin, TGS has pushed this high-resolution project north into the Bonaparte Basin area. The study incorporates a further 165 wells located across the Ashmore Platform, Vulcan Sub-basin, Londonderry High, Malita and Calder Grabens, Sahul and Flamingo synclines, Laminara and Flamingo highs, Sahul Platform, Troubadour Terrace, and offshore Petrel Sub-basin areas. This multi-basin project has combined all the selected relevant public data into one interpretation study and is delivered in an integrated environment—wells are standardised and sequences interpreted. Once depositional environment and facies are allocated, multi-element maps are produced showing how the basin environments change through time and structural evolution. Stratigraphic interpretation has determined 37 sequences and 32 associated facies maps. Both Browse Basin (140,000 km2) and Bonaparte Basin (270,000 km2) are relatively less explored and at different ages in their exploration life-cycle. Both have proved to be oil and gas bearing across numerous different stratigraphic ages with a wide range of trapping and reservoir methods. This study aims to further aid North West Shelf exploration by delineating, among other facets, the presence or otherwise of rocks with reservoir and seal potential and by identifying structural elements such as the Petrel Sub-basin salt diapirs. This regional well data stratigraphic approach has been used across all the UK and Norway continental shelf hydrocarbon provinces. TGS sees the Australian North West Shelf as a province where this approach will further assist sub-surface understanding, and hence exploration success.

Implications of source overcharge for prospect assessment

2015 ◽  
Vol 3 (2) ◽  
pp. T93-T107
Author(s):  
Richard S. Bishop
Keyword(s):  
Oil And Gas ◽  
Tectonic Setting ◽  
Field Studies ◽  
Fundamental Aspect ◽  
Statistical Distributions ◽  
Free Gas ◽  
Wide Range ◽  
Fault Leakage ◽  
Discrete Values ◽  
Gas Leaks

A fundamental aspect of prospect evaluation is whether the trap volume or the charge volume limits the volume of trapped hydrocarbons. Traps filled to a leak point are full traps, although I rarely describe them as such. I commonly say “full to spill” but rarely do I hear “full to a leak point.” Why not? A summary of literature from fault leakage, seeps, field studies, and theoretical source-yield calculations illustrates the implication that source overcharge (i.e., the charge exceeding the trap volume) occurs in basins that vary widely in age and tectonic setting. Perhaps surprisingly, this is true for oil and gas fields and for a wide range of source rock quality from rich to lean. The most obvious implication from source overcharge is that the volume of trapped hydrocarbons is limited by the absolute volume of the trap. Less obvious is the recognition that if oil and free gas are available to a trap, gas will displace the oil. Thus, if there are no gas leaks, the trap will contain only gas. If there is preferential leakage of gas, then the trap may contain a gas cap and an oil leg. Furthermore, the occurrence of oils saturated with gas likely indicates selective leakage of free gas. Hydrocarbon contacts (whether oil-water, gas-oil, or gas-water) are interpreted to define the leak or spill point or seal capacity. Thus, instead of using continuous statistical distributions to describe all elements of traps, some elements such as area are more appropriately described as discrete values and a full assessment may be a combination of discrete plus continuous statistical distributions. Overcharge may also lead to different interpretations of risk. Interpreting the trap volume, particularly with leak points, leads to the notion that risk evaluation might consider the number and quality of potential leak points.

scholarly journals Study of Oil in the North of Russia by the Geological Committee at the End of the 19th Century – the Beginning of the 20th Century

2021 ◽  
Vol 937 (4) ◽  
pp. 042082
Author(s):  
T P Filippova
Keyword(s):  
Field Studies ◽  
The Arctic ◽  
Russian Science ◽  
The North ◽  
New Information ◽  
Wide Range ◽  
Northern Territories ◽  
The 19Th Century ◽  
First Time

Abstract The article draws attention to the study of the historical experience of Russian science in the development of the Arctic and northern territories of Russia. Based on a wide range of archival and published sources, the role of the Geological Committee in the scientific study of the Ukhta oil-bearing region is analyzed. The chronological framework of the study covers the period of the organization’s activity from 1882 to 1929. The field studies carried out by the Geological Committee which started during this period in the Ukhta region are considered in detail. As a result of this activity, this territory was comprehensively studied for the first time, including a detailed geological survey, the search for oil deposits, and an assessment of its industrial potential. It has been determined that as a result of the surveys of the Geological Committee, new information about the features of the geological and orographic structure of the region was obtained and the oil-bearing potential was proved. It has been concluded that the research of the scientists of the committee laid a fundamental basis for the study of the Ukhta oil-bearing region and predetermined its further development history and great significance for the state.

Survival and dormancy of purple nutsedge (Cyperus rotundus) tubers

Weed Science ◽  
1997 ◽  
Vol 45 (6) ◽  
pp. 784-790 ◽  
Author(s):  
Christophe Neeser ◽  
Renan Aguero ◽  
Clarence J. Swanton
Keyword(s):  
Population Dynamics ◽  
Field Studies ◽  
Cyperus Rotundus ◽  
Burial Depth ◽  
Tuber Dormancy ◽  
Purple Nutsedge ◽  
Wide Range ◽  
Noxious Weed ◽  
First Time ◽  
Effect Of Age

Survival and dormancy of purple nutsedge tubers has not been studied quantitatively. Yet this is fundamental to our understanding of the population dynamics of this highly noxious weed. Field studies were conducted to determine the effect of age on tuber survival and dormancy. A modified exponential decay function accurately described the age-dependent decline in tuber survival. This model is biologically meaningful, has good statistical properties, and can describe a wide range of responses. Tuber population half-life was 16 mo, and the predicted longevity (99% mortality) was 42 mo. Burial depth at 8 and 23 cm had no significant effect on survival or dormancy. Tuber dormancy increased with age. After 18 mo, the proportion of dormant tubers in the surviving population was two-and-one-half times higher than in the 3-mo-old population. We report for the first time that tubers were able to enter a state of secondary dormancy after sprouting. The finding that tubers persist after sprouting has important implications for population dynamics of this species. This is also the first report of tuber predation by the larvae of a billbug.

Tectonic-structural analysis of deposits in sediments of contact between sedimentary cover and basement

2020 ◽  
pp. 8-19
Author(s):  
E. S. Milei ◽  
S. R. Bembel
Keyword(s):  
Oil And Gas ◽  
Pannonian Basin ◽  
Sedimentary Cover ◽  
Geological Structure ◽  
Southeastern Part ◽  
Hydrocarbon Traps ◽  
Deep Faults ◽  
Adjacent Structures ◽  
Wide Range ◽  
Characteristic Features

The article is devoted to a comprehensive analysis of the geological structure of a complex oil reservoir located in the southeastern part of the Pannonian basin. The concept of the hydrocarbon traps formation is based on the connection with the deep processes of oil and gas formation and phenomena, which lead to the formation of cracks, faults, local positive structures in the interval from the foundation to the upper part of the sedimentary cover. The article shows the significance of deep faults in the basement during the formation of sedimentary cover structures. These processes result in a wide range of oil and gas potential of the Pannonian basin deposits. In studying the specifics of tectonic movements and the features of gravitational deposits (conglobreccia), a tectono-sedimentary approach has been developed that can reduce a number of methodological difficulties in creating geological models and concepts. Recommendations are given on the additional study of adjacent structures in order to detect hydrocarbon deposits on the slopes with protrusions of the crystalline basement. Characteristic features of the geological structure are the local volume of the identified oil and gas deposits, small foci of increased productivity and improved filtration properties of reservoirs. Such features of the uneven distribution of sites of different productivity have a significant impact on the success of prospecting and exploration, the effectiveness of development of oil and gas deposits.

scholarly journals Occurrence of the birds of the Middle Volga Region (South-East of the European part of Russia)

2021 ◽  
Vol 9 ◽  
Author(s):  
Anastasia Klenina ◽  
Alexander Ruchin ◽  
Evgenii Bykov
Keyword(s):  
Human Life ◽  
Field Studies ◽  
Original Data ◽  
Volga Region ◽  
Middle Volga Region ◽  
Wide Range ◽  
Acoustic Methods ◽  
European Part Of Russia ◽  
Middle Volga ◽  
First Time

Birds are the most numerous and widespread group of higher vertebrates. Due to the peculiarities of their biology, birds play an important role in nature and in human life. Ornithological studies described in this publication were conducted in seven regions of the Middle Volga Region (Chuvashia, Mordovia, Tatarstan, Samara, Nizhny Novgorod, Ulyanovsk and Penza Regions) from 1978 to 2021. Visual and acoustic methods were used to study the species composition during field studies. In total, 5065 birdoccurrences belonging to 157 species, 48 families and 19 orders were registered. All occurrences have a geographical reference. The large volume of data collected, the wide geographical coverage and the long-term nature of the observations determined the value of their inclusion in the GBIF and the need for publication in the Biodiversity Data Journal. We are publishing our original data on the coordinates of bird occurrences in the Middle Volga Region for the first time. Most of the original information about bird occurrences was contained in field diaries and was not available to a wide range of researchers. All 5065 occurrences are new to GBIF.

scholarly journals Paleozoic (Pre-Khuff Hydrocarbon Geology of the Ghawar Area, Eastern Saudi Arabia

GeoArabia ◽  
1998 ◽  
Vol 3 (2) ◽  
pp. 273-302 ◽  
Author(s):  
Lawrence E. Wender ◽  
Jeffrey W. Bryant ◽  
Martin F. Dickens ◽  
Allen S. Neville ◽  
Abdulrahman M. Al-Moqbel
Keyword(s):  
Oil And Gas ◽  
Primary Source ◽  
Lower Permian ◽  
Hydrocarbon Generation ◽  
Alpine Orogeny ◽  
Associated Gas ◽  
Lower Silurian ◽  
Hydrocarbon Reservoir ◽  
Hydrocarbon Traps ◽  
Complex Structural

ABSTRACT Saudi Aramco is conducting an exploration program to discover additional non-associated gas reserves in the Ghawar Area. The program has successfully discovered significant sweet gas and condensate reserves in the pre-Khuff siliciclastics and has further increased our understanding of the Paleozoic petroleum system. The Lower Permian Unayzah Formation is the principal pre-Khuff hydrocarbon reservoir in the Southern Ghawar Area, where it contains both oil and gas. The Unayzah consists of fluvial to marginal marine sandstones. The Devonian Jauf Formation is the principal pre-Khuff reservoir in the Northern Ghawar Area, where it hosts the recently discovered giant Hawiyah gas-condensate field. The Jauf consists of shallow marine sandstones that exhibit unusually high porosities considering the burial depths. The primary source rock for pre-Khuff hydrocarbons is the basal “hot shale” of the Lower Silurian Qalibah Formation. Maturation modeling of these shales indicates hydrocarbon generation began in the Middle Triassic (oil) and continues to the present (dry gas). Pre-Khuff hydrocarbon traps are found in simple four-way closures as well as more complex structural-stratigraphic traps on the flanks of Hercynian structures. Trap formation and modification occurred in four main phases: (1) Carboniferous (Hercynian Orogeny); (2) Early Triassic (Zagros Rifting); (3) Late Cretaceous (First or Early Alpine Orogeny); and (4) Tertiary (Second or Late Alpine Orogeny). Structures in the Ghawar Area show differences in growth histories, which have impacted the amount and type of hydrocarbons contained.

Probabilistic Aggregation of Oil and Gas Field Resource Estimates and Project Portfolio Analysis

2009 ◽  
Vol 13 (01) ◽  
pp. 72-81 ◽  
Author(s):  
Jan F. van Elk ◽  
Ritu Gupta ◽  
David Wann
Keyword(s):  
Oil And Gas ◽  
Oil Industry ◽  
Field Studies ◽  
Critical Element ◽  
Gas Field ◽  
Uncertainty Range ◽  
Production Forecasting ◽  
True Value ◽  
Wide Range ◽  
Oil And Gas Field

Summary Probabilistic aggregation and dependency estimation are essential in portfolio methods, production forecasting, and resource estimation. The use of arithmetic addition understates the true value of the resource estimates within a portfolio of fields. Potentially, this could result in deferral of a project, or loss of lucrative business and commercial opportunities, such as project investment, facilitysizing decisions, or incremental gas-supply commitments. A statistically robust method for aggregation of resource estimates that appropriately uses expert opinion is presented in this paper. Using two integrated-project examples, this paper introduces new methods for (1) probabilistic aggregation of the resource estimates for multiple fields and (2) estimating a measure of dependency between the resource estimates of individual fields. The new analytical method for probabilistic aggregation is based on multivariate skew-normal (MSN) distributions, which can model a wide range of skewness through a shape parameter and are used heavily in financial and actuarial applications. In studies of the fields in which the multiple-realizations approach is used as a basis for the uncertainty framework, tornado diagrams are generated routinely to describe the dependence of the field resources on reservoir parameters. The improved method for evaluating measures of dependency between the resource estimates within a portfolio of fields uses these tornado diagrams as a basis. Incorporating the expertise and knowledge of geologists and petroleum engineers is a critical element of the method. These methods for probabilistic aggregation and estimating dependencies were developed within the context of the oil industry, but their use is not limited to the oil industry. They are general and can be used in other probabilistic-aggregation problems. Application of these techniques requires limited time and effort, compared to individual-field studies, and can have a profound impact on the uncertainty range of the total resources for the portfolio of fields.

scholarly journals Hydrodynamic features of oil and gas bearing deposits of the southern areas of Ob-Irtysh interfluves

Georesursy ◽  
2019 ◽  
Vol 21 (4) ◽  
pp. 85-94
Author(s):  
Dmitry A. Novikov ◽  
Fedor F. Dultsev ◽  
Anatoliy V. Chernykh ◽  
Svetlana V. Ryzhkova
Keyword(s):  
Oil And Gas ◽  
Dominant Role ◽  
Water Pressure ◽  
Pressure Change ◽  
Reservoir Properties ◽  
Hydrodynamic Field ◽  
First Time ◽  
Gas Bearing ◽  
Pressure Factor ◽  
West Siberian Basin

The results of study of hydrogeological conditions of oil and gas bearing deposit of the southern areas of Ob-Irtysh interfluves (southern regions of West Siberian basin) are presented. The hydrodynamic field is characterized by direct dependence and the presence of normal and increased pressure (formation anomalous pressure factor not exceed 1.13) is common in Apt-Alb-Cenomanian, Neokomian, Jurassic and pre-Jurassic complexes. The results of study of the reservoir properties and hydrodynamic conditions indicated that the elision water exchange play the dominant role in the modern hydrogeological structure formation. Two types of water drive system is established: elisional (lithostatical and termodehydrational) in the inner areas (southern part of Koltogor-Nyurolsky trench, Nyurolskaya megadepression, Verkhnevasyugansk anteclise and other structures) and infiltrational within the territory of Baraba-Pikhtovo monocline. Elisional system is replaced by the elisional-termodehydrational at the depth 2.0-2.2 km. Large piezo maximum zones (southern part of Koltogor-Nyurolsky trench and Nyurolskaya megadepression) become the inner regions of water pressure generation (the inner feed areas) with the maximal degree of hydrogeological closure of the interior. The region of piezo minima, tracing the structures of the Barabinsk-Pikhtovskaya megamonocline, relates to the external feed area. The hydrodynamic model of the southern areas of Ob-Irtysh interfluves is building for the first time and allow to predict the pressure change trends in the areas with poorly provided with the actual data.

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