Understanding Oil and Gas Shows and Seals in the Search for Hydrocarbons

Dolson, John

doi:10.1007/978-3-319-29710-1

Cited by 20 publications

(23 citation statements)

References 85 publications

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“…It is therefore not considered in this study. In a stable water-wet system, the interfacial tension and wettability remain relatively constant (Dolson 2016). It is therefore the pore throat radius that exerts the biggest influence on the capillary threshold pressure and will usually change according to lithology, burial and diagenesis.…”

Section: Mechanisms By Which Hydrocarbons Can Leak From Structural Trapsmentioning

confidence: 99%

Key controls on hydrocarbon retention and leakage from structural traps in the Hammerfest Basin, SW Barents Sea: implications for prospect analysis and risk assessment

Edmundson¹,

Rotevatn²,

Davies³

et al. 2019

Preprint

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Evidence of hydrocarbon leakage has been well documented across the SW Barents Sea and is commonly associated with exhumation in the Cenozoic. However, further study is required to understand what specific mechanism(s) facilitate such leakage, and why this occurs in some locations and not others. We use seismic and well data to quantify fault- and top-seal strength based on mechanical and capillary threshold pressure properties of fault and cap-rocks. Magnitude and timing of fault slip are measured to acknowledge the role that faults play in controlling fluid flow. Results strongly indicate that across-fault and top-seal breach by capillary threshold pressure, and top-seal breach by mechanical failure are highly unlikely to have caused hydrocarbon leakage. Instead, top-seal breach caused by both tectonic reactivation of faults and fault dilation associated with de-glaciation processes is likely to have facilitated widespread hydrocarbon leakage from structural traps. The results presented herein have implications for understanding mechanisms and locations of hydrocarbon leakage from structural traps across basins worldwide. This is particularly important for exploration and production of hydrocarbons since seal failure is the main cause of dry wells.

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Section: Mechanisms By Which Hydrocarbons Can Leak From Structural Trapsmentioning

confidence: 99%

Key controls on hydrocarbon retention and leakage from structural traps in the Hammerfest Basin, SW Barents Sea: implications for prospect analysis and risk assessment

Edmundson¹,

Rotevatn²,

Davies³

et al. 2019

Preprint

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“…Oil and gas are lighter than water and therefore get trapped in a reservoir above the water column. A reservoir, typically composed of a porous media such as sandstone or limestone, is the location where the oil and gas remain until extracted via vertical drilling and pumping (Dolson, 2016). Reservoir rocks can be quantified by values of porosity and permeability.…”

Section: General Stratigraphic and Hydrogeologic Framework In Areas Omentioning

confidence: 99%

“…These characteristics also apply to water-bearing capabilities of rocks. Oil and gas typically remain in reservoirs until extracted by pumping (Dolson, 2016).…”

Section: General Stratigraphic and Hydrogeologic Framework In Areas Omentioning

confidence: 99%

Assessment of water resources and the potential effects from oil and gas development in the Bureau of Land Management Tri-County planning area, Sierra, Doña Ana, and Otero Counties, New Mexico

Blake¹,

Miltenberger²,

Stewart³

et al. 2018

Scientific Investigations Report

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For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment-visit https://www.usgs.gov or call 1-888-ASK-USGS.For an overview of USGS information products, including maps, imagery, and publications, visit https://store.usgs.gov.Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.Suggested citation: Blake, J.M., Miltenberger, Keely, Stewart, Anne, Ritchie, Andre, Montoya, Jennifer, Durr, Corey, McHugh, Amy, and Charles, Emmanuel, 2018, Assessment of water resources and the potential effects from oil and gas development in the Bureau of Land Management Tri-County planning area, Sierra, Doña Ana, and Otero Counties, New Mexico: U.S. Geological Survey Scientific Investigations Report 2017-5151, 87 p., https://doi.org/10.3133/sir20175151. ISSN 2328-0328 (online) iii AcknowledgmentsThis study was conducted in cooperation with the Bureau of Land Management. We would like to thank the following Bureau of Land Management employees for their assistance with this report: Dave Herrell and James Glover and the following U.S. Geological Survey employees for their assistance with this report: Jessica Hopple, Zach Shephard, Aurelia Mitchell, and Delbert Humberson. DatumVertical coordinate information is referenced to the North American Vertical Datum of 1988 (NAVD 88).Horizontal coordinate information is referenced to the North American Albers Datum of 1983 (NADAlbers 83).Horizontal coordinate information for cross sections is referenced to the North American Datum of 1983 (NAD 83).Altitude, as used in this report, refers to distance above the vertical datum. Supplemental InformationConcentrations of chemical constituents in water are given in milligrams per liter (mg/L). Abbreviations AbstractThe U.S.

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“…The rock texture in the water flow direction is just the opposite. Its grains are fine grained and the permeability is low, while its displacement pressure is high, and when the oil is accumulated in the rock, the oil distribution is controlled by the capillary pressure (Dolson, 2016). The area with poor rock physical properties would have high displacement pressure, and deep oil-water contact; and the area with good rock physical properties would have low displacement pressure, and shallow oil-water contact (Shi Dianhai, 2006).…”

Section: Tilt Of Oil-water Contact Caused By Capillary Pressurementioning

confidence: 99%

A Review of Formation Mechanism Study on Reservoirs with Tilted Oil-water Contacts

Wang

Zhang

Zhou³

et al. 2017

Acta Geologica Sinica - English Edition

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The distribution characteristics of the oil‐water contact are the basis for the reservoir exploration and development and reserves evaluation. The reservoir with a tilted oil‐water contact has a unique formation mechanism, and the understanding of its distribution and formation mechanism will directly affect the evaluations for the reservoir type, well deployment, selection of well pattern and type, determination of test section, and reserves evaluation. Based on the analysis of reservoir characteristics, petrophysical properties and geological structure in 40 reservoirs worldwide with tilted oil‐water contacts, the progress of the research on the formation mechanisms of titled oil‐water contacts is summarized in terms of the hydrodynamic conditions, reservoir heterogeneity, neotectonic movement and oil‐gas exploitation. According to the formation mechanism of tilted oil‐water contacts and the needs of exploration research, different aspects of research methods are summarized and classified, such as the calculation of equipotential surfaces for oil and water in the formation, analysis of formation pressure and analysis of reservoir physical properties and so on. Based upon statistical analysis, it is suggested that the degree of the inclination of the oil‐water contact be divided based on the dip of oil‐water contact (DipTOWC). The tilted oil‐water contact is divided into three categories: large dip (DipTOWC≥55 m/km), medium dip (4 m/km≤DipTOWC<55 m/km), and small dip (DipTOWC<4 m/km). The classification and evaluation method can be combined with structure amplitude and reservoir property. The formation mechanism of domestic and international reservoirs with tilted oil‐water contacts are summarized in this paper, which have important significance in guiding the exploration and development of the oilfield with tilted oil‐water contacts, reserves evaluation, and well deployment.

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Understanding Oil and Gas Shows and Seals in the Search for Hydrocarbons

Cited by 20 publications

References 85 publications

Key controls on hydrocarbon retention and leakage from structural traps in the Hammerfest Basin, SW Barents Sea: implications for prospect analysis and risk assessment

Key controls on hydrocarbon retention and leakage from structural traps in the Hammerfest Basin, SW Barents Sea: implications for prospect analysis and risk assessment

Assessment of water resources and the potential effects from oil and gas development in the Bureau of Land Management Tri-County planning area, Sierra, Doña Ana, and Otero Counties, New Mexico

A Review of Formation Mechanism Study on Reservoirs with Tilted Oil-water Contacts

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