Topic
Petroleum reservoir
About: Petroleum reservoir is a research topic. Over the lifetime, 5403 publications have been published within this topic receiving 83535 citations. The topic is also known as: petroleum deposit.
Papers published on a yearly basis
Papers
More filters
TL;DR: The megacompartment complex as mentioned in this paper is a basinwide, completely sealed overpressured compartment, which is the most important source of natural gas from the Pennsylvanian Red Fork and Morrowan sandstones.
Abstract: Integrated pore pressure, potentiometric, and geologic data in the Anadarko basin demonstrate the existence of a basinwide, completely sealed overpressured compartment, called the megacompartment complex. All reservoirs within this complex exhibit pressure gradients that exceed the normal gradient of 10.515 kPa/m (0.465 psi/ft). These reservoirs have produced large quantities of natural gas, particularly from the Pennsylvanian Red Fork and Morrowan sandstones. This megacompartment complex is enclosed by top, basal, and lateral seals. The top seal zone, which is located between 2290 m and 3050 m (7500 and 10,000 ft) below the surface, is relatively horizontal, dips slightly to the southwest, and appears to cut across stratigraphy. However, the diagenetically enhanced basal seal is stratigraphically controlled and seems to coincide with the Devonian Woodford Shale. The complex is laterally sealed to the south by a vertical cementation zone associated with the frontal fault zone of the Wichita Mountain uplift and by the convergence of the top and basal seals along the eastern, northern, and western boundaries. The interior of the complex is subdivided into a myriad of smaller compartments with distinct pressure gradients. In addition, local overpressured compartments are present outside the megacompartment complex in normally and near-normally pressured regions.
33 citations
TL;DR: In this article, the authors show that a more oil-prone source facies is present in marine shales of the deep Wilcox Group in southcentral Louisiana, which is consistent with geologic constraints that suggest an origin of crude oil from within the Wilcox group itself.
Abstract: Geochemical characterization of crude oils from Wilcox reservoirs in central Louisiana and southwest Mississippi suggests that they represent a single crude oil family that is distinct when compared to crude oils in deeper Tuscaloosa and Smackover reservoirs. This observation is consistent with geologic constraints that suggest an origin of crude oil from within the Wilcox Group itself. Although shales of the shallow Wilcox Group in central Louisiana and southwest Mississippi contain gas-prone kerogen and are thermally immature, a more oil-prone source facies is present in marine shales of the deep Wilcox Group in southcentral Louisiana. Thermal maturity measurements based on pyrolysis suggest a broad area of effective Wilcox source rock in southcentral Louisiana. Migration distances from source to reservoir rocks of the downdip Wilcox Trend of southcentral Louisiana appear to be relatively short. However, long-range updip migration (sometimes greater than 100 km) from deeply buried Wilcox source facies provides the best explanation for emplacement of crude oil in the shallow Wilcox Trend of central Louisiana and southwest Mississippi.
32 citations
TL;DR: The Jurassic/Triassic Age Nugget sandstone of the southwestern Wyoming overthrust belt is a texturally heterogeneous reservoir with anisotropic properties that have been inherited primarily from the depositional environment but also have been modified by diagenesis and overprinted by tectonism as mentioned in this paper.
Abstract: The Jurassic/Triassic Age Nugget sandstone of the southwestern Wyoming overthrust belt is a texturally heterogeneous reservoir with anisotropic properties that have been inherited primarily from the depositional environment but also have been modified by diagenesis and overprinted by tectonism. Predominantly Eolian processes deposited crossbedded, low-angle to horizontally bedded and rippled, very-fine- to coarse-grained sand in dunes, interdune areas, and associated environments. Original reservoir quality has been somewhat modified by compaction, cementation, dissolution, clay mineralization, and the precipitation or emplacement of hydrocarbon asphaltenes or residues. Low-permeability gouge- and carbonate-filled fractures potentially restrict hydrocarbon distribution and negatively affect producibility, whereas discontinuous open fractures enhance permeability in some intervals. Contrast in air permeability between dune and interdune deposits ranges over four to five orders of magnitude. Dune and interdune intervals are correlatable locally with the aid of core log, conventional log, and stratigraphic dipmeter data. Stratigraphic correlations then can be utilized to model the lateral and vertical extent of directional properties in the reservoir.
32 citations
01 Jan 1992
TL;DR: Chilingarian and Mazzullo as mentioned in this paper proposed a diagenetic approach for the measurement of porosity in carbonate sediments and rocks, and showed that porosity is correlated with surface area and residual water saturation.
Abstract: 1. Introduction (G.V. Chilingarian, S.J. Mazzullo, H.H. Rieke). Important, relatively new concepts. Traditional concepts: classification schemes. Reserve analysis of carbonate reservoirs. Reserve calculation methods. Fractured reservoir rocks and fractures. Relative permeability concepts. Prediction of overpressured formations in carbonate reservoirs. Appendices: Material balance equation. Application of petrography and statistics to the study of some petrophysical properties of carbonate reservoir rocks. 2. Carbonate Rock Classifications (S.J. Mazzullo, G.V. Chilingarian, H.J. Bissell). Classification of limestones. Classification of dolomites. Classification of dolomites of marine origin. 3. Depositional Models of Carbonate Reservoirs (S.J. Mazzullo, G.V. Chilingarian). Stratigraphic traps in carbonate rocks: a review. Depositional facies in marine carbonate rock reservoirs. Platform types. 4. Diagenesis and Origin of Porosity (S.J.Mazzullo, G.V. Chilingarian). Overview of concepts. Methods of diagenetic study. Porosity characteristics of carbonate sediments and rocks. Formation of secondary matrix porosity in limestones. Porosity in dolomites. Reservoir examples. 5. Carbonates as Hydrocarbon Source Rocks (R.J. Cordell). Characteristic lithologies of carbonate source beds. Depositional environments. Environmental interpretations from geochemistry. Diagenesis. Source-bed geochemistry. Maturation.Effects of clay minerals. Maturation examples. Migration mechanisms. Matching source with reservoir. 6. Pore Geometry of Carbonate Rocks and Capillary Pressure Curves ( Basic Geologic Concepts ) (R.L. Jodry). Classification of carbonate porosity. Capillary pressure curve interpretation. Interrelation between pore geometry and rock types. Application of pore geometry characteristics to exploration. Pore geometry of dolomites. 7. Interrelationships among Surface Area, Permeability, Porosity, Pore Size, and Residual Water Saturation (G.V. Chilingarian, J. Torabzadeh, H.H. Rieke, M. Metghalchi, S.J. Mazzullo). Theoretical and empirical equations relating porosity, permeability, and surface area. Statistical technique of determining specific surface area. Interrelationships among surface area, rock granulometric composition, porosity, permeability, and residual water saturation. 8. Permeability and Relative Permeability of Carbonate Reservoirs (M.M. Honarpour, G.V. Chilingarian, S.J. Mazzullo). Relationship between effective and absolute permeability. Permeability parallel to bedding versus permeability perpendicular to bedding. Effects of rock properties on relative permeability. Effects of saturation history on relative permeability. Effects of temperature on relative permeability. Laboratory- measured relative permeability examples. Three-phase relative permeability of carbonate rocks. Empirical correlation. 9.Compressibility (G.V. Chilingarian, J. Torabzadeh, J.O. Robertson, H.H. Rieke, S.J. Mazzullo).
32 citations
01 Jan 2008
TL;DR: Coal is defined as a rock composed of more than 50% organic matter by weight and is thus by definition the rock type that is richest in organic matter as discussed by the authors, and coal is considered an important petroleum source rock, and the ways in which petroleum compounds can be generated and expelled from coal is a subject of vigorous debate.
Abstract: Publisher Summary
Coal is defined as a rock composed of more than 50% organic matter by weight and is thus by definition the rock type that is richest in organic matter. For this reason, coal is considered an important petroleum source rock, and the ways in which petroleum compounds can be generated and expelled from coal is a subject of vigorous debate. Coal is also an important reservoir for natural gas, and gaseous hydrocarbons produced from coal are commonly referred to as coalbed methane. Coal also contains significant quantities of other gases, such as carbon dioxide and nitrogen. These gases occur in coal naturally, and the potential exists to inject gases into coal for environmental and economic benefit. The chapter explains that coal contains diverse forms of organic matter spanning a broad range of chemical composition, and this compositional variability combined with geologic history determine what types of hydrocarbons can be generated.
32 citations