Origin and migration of oil and gas

2015 ◽  
pp. 225-240
Author(s):  
Fred F. Meissner
Keyword(s):  
Oil And Gas ◽  
And Migration

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.

Understanding the Flow Dynamics of CO2 Plumes in the Subsurface

2021 ◽  
Author(s):  
Florence Letitia Bebb ◽  
Kate Clare Serena Evans ◽  
Jagannath Mukherjee ◽  
Bilal Saeed ◽  
Geovani Christopher
Keyword(s):  
Carbon Capture ◽  
Oil And Gas ◽  
Co2 Storage ◽  
Flow Dynamics ◽  
Hydrocarbon Exploration ◽  
Hydrocarbon Reservoir ◽  
Exploration And Production ◽  
And Migration ◽  
Carbon Dioxide Co2 ◽  
Hydrocarbon Exploration And Production

Abstract There are several significant differences between the behavior of injected CO2 and reservoired hydrocarbons in the subsurface. These fundamental differences greatly influence the modeling of CO2 plumes. Carbon capture, utilization, and storage (CCUS) is growing in importance in the exploration and production (E&P) regulatory environment with the Oil and Gas Climate Initiative (OGCI) making CCUS a priority. Companies need to prospect for storage sites and evaluate both the short-term risks and long-term fate of stored carbon dioxide (CO2). Understanding the physics governing fluid flow is important to both CO2 storage and hydrocarbon exploration and production. In the last decade, there has been much research into the movement and migration of CO2 in the subsurface. A better understanding of the flow dynamics of CO2 plumes in the subsurface has highlighted a number of significant differences in modeling CO2 storage sites compared with hydrocarbon reservoir simulations. These differences can greatly influence reliability when modeling CO2 storage sites.

Oil and gas in Kurgan region

2021 ◽  
pp. 9-24
Author(s):  
A. A. Arsenyev ◽  
D. S. Leontiev ◽  
M. D. Zavatsky ◽  
V. V. Saltykov
Keyword(s):  
Oil And Gas ◽  
Field Work ◽  
Research Area ◽  
Petroleum Potential ◽  
Gas Recovery ◽  
History Of ◽  
And Migration ◽  
Active Processes ◽  
Geochemical Studies ◽  
High Degree

This article analyzes the prospects of petroleum potential in Kurgan region. The relevance of the work is due to the high degree of development of the traditional oil and gas recovery areas of Western Siberia, which leads to the need to organize search activities in areas with a low density of hydrocarbon resources. We have analyzed the results of exploratory drilling in the area of the Alabuga river in Kurgan region, and have studied the history of detections of onshore oil occurrences there. Based on the results of the retrospective analysis, the research area was determined, field work was performed to determine the state of search wells in the area, and a collection of geochemical soil and liquid samples was selected. The analysis of the samples revealed that all of them contain methane and its homologues up to and including pentane. The genesis of light methane homologs is related to the processes of catagenesis; their detection on the surface indicates active processes of generation and migration of petroleum hydrocarbons. Based on the analysis of archival materials and estimated ground-based geochemical studies, a conclusion is made about petroleum potential in Kurgan region.

Eromanga (Queensland) exploration–new concepts for an old basin

2011 ◽  
Vol 51 (1) ◽  
pp. 333
Author(s):  
David Lowry ◽  
David Evans
Keyword(s):  
Oil And Gas ◽  
Oil Field ◽  
Secondary Migration ◽  
New Concepts ◽  
Oil Generation ◽  
And Migration ◽  
Oil Expulsion ◽  
Sonic Logs ◽  
Southern Flank ◽  
Eromanga Basin

Eromanga Basin exploration surged in Queensland after the discovery of the Jackson field in 1982, but has ebbed over the last 20 years. Perceived exploration risks are: • Oil generation and migration peaked in the mid-Cretaceous before much of the anticlinal structuring, so that modern structure is an uncertain guide to Cretaceous migration paths. • Permian coals are generally credited with sourcing most of the oil and gas in the Cooper-Eromanga Basin. In Queensland, the Permian largely drains to the southern flank and the northern flank is thought to have a high charge risk. This study covers 100,000 km2. It used sonic logs to determine the amount of Tertiary erosion and thus allows the preparation of structure maps restored to mid-Cretaceous time. Maturity maps of the Birkhead and Poolowanna Formations were computed from a reflectance/restored temperature algorithm based on 50 wells. Source rock thickness maps and an oil expulsion model based on Pepper and Corvi (1995a, 1995b) then allowed oil expulsion to be mapped regionally. The study produces the key results that could be expected from 3D earth modelling, but with great savings in time and money. The study demonstrates an oil kitchen at both Poolowanna and Birkhead stratigraphic levels in the vicinity of Tanbar–1. Secondary migration losses are speculative, but modelling shows that hundreds of millions of barrels of oil from each formation have migrated west towards the Curalle ridge, north to Inland and Morney, and southeast to Mt Howitt. The Inland oil field is presently an isolated anomaly on the northwest flank of the basin, but this study suggests that further exploration in the area could be successful.

FRACTALS AND SECONDARY MIGRATION

Fractals ◽  
1995 ◽  
Vol 03 (04) ◽  
pp. 799-806 ◽  
Author(s):  
PAUL MEAKIN ◽  
GERI WAGNER ◽  
VIDAR FRETTE ◽  
JENS FEDER ◽  
TORSTEIN JØSSANG
Keyword(s):  
Oil And Gas ◽  
Fractal Model ◽  
Source Rocks ◽  
Fracture Aperture ◽  
Low Density ◽  
Secondary Migration ◽  
Gravity Driven ◽  
And Migration ◽  
Water Saturated ◽  
Wetting Fluid

The process of secondary migration, in which oil and gas are transported from the source rocks, through water saturated sedimentary carrier rocks, to a trap or reservoir can be described in terms of the gravity driven penetration of a low-density non-wetting fluid through a porous medium saturated with a wetting fluid. This process has been modeled in the laboratory and by computer simulations using homogeneous porous media. Under these conditions, the pattern formed by the migrating fluid can be described in terms of a string of fractal blobs. The low density internal structure of the fractal blobs and the concentration of the transport process onto the self-affine strings of blobs (migration channels) both contribute to the small effective hydrocarbon saturation in the carrier rocks. This allows the hydrocarbon fluids to penetrate the enormous volume of carrier rock without all of the hydrocarbon being trapped in immobile isolated bubbles. In practice, heterogeneities in the carrier rocks play an important role. In some cases, these heterogeneities can be represented by fractal models and these fractal heterogeneity models provide a basis for more realistic simulations of secondary migration. Fractures may play a particularly important role and migration along open fractures was simulated using a self-affine fractal model for the fluctuating fracture aperture.

Hydrocarbon Retention and the Case for Vertical Migration

2021 ◽  
Author(s):  
Geovani Christopher Kaeng ◽  
Kate Evans ◽  
Florence Bebb ◽  
Rebecca Head
Keyword(s):  
Vertical Migration ◽  
Oil And Gas ◽  
Three Dimensional ◽  
Fluid Distribution ◽  
Hydrocarbon Migration ◽  
Gas Phases ◽  
Hydrocarbon Charging ◽  
Control Fluid ◽  
And Migration

Abstract Complex hydrocarbon charging and distribution in which reservoirs are filled by oil and gas phases with different densities and genetic types inter-fingering within the basin, are common phenomena, and often attributed to vertical migration. This paper discusses the factors that control vertical hydrocarbon migration and presents modelling of the hydrocarbon charging and entrapment history in a tertiary basin in Southeast Asia as a case study. According to the Young-Laplace flow theory of the secondary hydrocarbon migration mechanics, migration occurs in a state of capillary equilibrium in a flow regime dominated by buoyancy and capillary forces. In this study, the invasion percolation simulation algorithm, based on the Young-Laplace flow, was used. During the simulation, three-dimensional (3D) seismic data were used as the high-resolution base grid for migration to capture the effect of both structure and facies heterogeneities on fluid flow. A model of an unfaulted system was presented to make the case. In the study area there is inter-fingering between oil and gas across different formations; most oils are trapped in the deeper formation, oil and gas inter-fingering occurs in the middle formation, and the upper formation contains mostly gas. This arrangement is possible because of the interplay between the expelled fluid buoyancy and relatively weak intra-formational seals within the basin. The modeling results were then calibrated to known accumulations or fluid presence in wells. In a basin dominated by a vertical migration regime, hydrocarbons are prevented from travelling far from the kitchen, thus decreasing prospectivity away from the kitchen. Through a case study, this paper helps to understand the factors that influence hydrocarbon retention and migration that control fluid distribution within a basin. Eventually the study helps geologists to understand prospectivity risking related to hydrocarbon charging, which is one of the main risks in exploration especially in mature basins.

scholarly journals Petrophysics and paradigms of oil and gas geology

Georesursy ◽  
2020 ◽  
pp. 10-14
Author(s):  
Aleksey M. Khitrov ◽  
Elena M. Danilova ◽  
Irina N. Konovalova ◽  
Marina N. Popova
Keyword(s):  
Oil And Gas ◽  
Seismic Exploration ◽  
Resource Base ◽  
Well Production ◽  
Exploration And Production ◽  
Light Oil ◽  
New Ideas ◽  
And Migration ◽  
Hydrocarbon Deposits ◽  
Current Paradigm

The main provisions of the current paradigm of prospecting, exploration and production of hydrocarbons, which are based on petrophysics and seismic exploration, are considered. It is shown that within its framework it is possible to apply any new ideas about the structure of natural reservoirs, the origin and migration of hydrocarbons. This paradigm will make it possible to move to the preparation of a qualitatively new resource base of the oil and gas complex through the discovery and development of hydrocarbon deposits in the best natural reservoirs with the best petrophysical parameters, high density of light oil and gas reserves, and high well production rates. New highly profitable hydrocarbon deposits will be discovered in areas with developed infrastructure, mainly in well-known oil and gas provinces.

scholarly journals ACTIVE FAULTS IN AZERBAIJAN AND THEIR POTENTIAL IMPACT ON THE OIL AND GAS DEPOSITS OF THE LOWER KURA DEPRESSION

2017 ◽  
Author(s):  
Г.Д. Етирмишли ◽  
Т.Я. Маммадли ◽  
Л.А. Ибрагимова
Keyword(s):  
Oil And Gas ◽  
Active Faults ◽  
Migration Patterns ◽  
Strong Earthquakes ◽  
Instrumental Data ◽  
Seismic Potential ◽  
Potential Impact ◽  
And Migration ◽  
Seismic Impact ◽  
Hydrocarbon Deposits

Исследуется возможное влияние сейсмотектонических процессов в активных разломах Нижне-Куринской депрессии Азербайджана и приграничных территорий на углеводородные залежи. По полученным инструментальным данным о многочисленных слабых сейсмических толчках, зарегистрированных обширной сетью цифровых станций, выявлены потенциальные очаговые зоны на территории исследования и оценен их сейсмический потенциал. Полученные результаты показывают, что в Нижне-Куринской депрессии и близлежащих территориях имеется ряд очаговых зон, которые могут генерировать землетрясения интенсивностью в I = IX - X баллов. Разрывные нарушения, образовавшиеся в этих очагах при сильных землетрясениях, могут привести к разрушению структур нефтегазовых залежей и миграции (утечке) нефти и газа. Explores the possible impact of seismotectonic processes in active faults of Azerbaijan lower Kura depression and bordering territories in hydrocarbon deposits. According to the obtained instrumental data of numerous weak seismic impact registered by extensive network of digital stations, potential endemic zone are identified on site research and their seismic potential are estimated. Obtained results shows, that in the lower Kura depression and bordering territories there are some focal zones, which can generate earthquakes with 10 points intensity. Faults arising in these focal zones when strong earthquakes, can lead to the destruction of oil and gas deposits and migration patterns (leakage) of oil and gas.

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