Facies-Related Diagenesis and Multiphase Siderite Cementation and Dissolution in the Reservoir Sandstones of the Khatatba Formation, Egypt's Western Desert

Rossi, Carlos; Marfil, R.; Ramseyer, Karl; Permanyer, A.

doi:10.1306/2dc40955-0e47-11d7-8643000102c1865d

Cited by 114 publications

(32 citation statements)

References 33 publications

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“…The most important part of deep oil and gas exploration is to find these reservoirs under current conditions. The genesis of deep-buried high-quality reservoirs mainly includes dissolution by organic acids (Surdam et al 1984), effects of hydrocarbon charging and deep thermal fluids (Navon et al 1988), clay mineral membranes (Ehrenberg 1993;Dolbier 2001), temperature and depth (Ezat 1997), faulting (Moretti et al 2002), abnormal pressure (Wilkinson et al 1997;Osborne and Swarbrick 1999), effects of fractures (Harris and Bustin 2002), sedimentary environment (Amthor and Okkerman 1998;Khidir and Catuneanu 2003;Pape et al 2005;Rossi et al 2001), and tectonics (Watkinson and Ward 2006). Preservation mechanisms mainly include early hydrocarbon charging (Gluyas et al 1990;Robinson and Gluyas 1992;Rothwell et al 1993), grain coating (Heald and Larese 1974;Ramm et al 1997), and overpressure (Ramm et al 1997;Osborne and Swarbrick 1999).…”

Section: Genetic Mechanisms and Preservation Conditions Of Deep-buriementioning

confidence: 99%

“…Despite these achievements, however, a lot of problems have also emerged in deep petroleum exploration. These include (a) the difficulty in understanding the conditions of deep oil-gas reservoirs and evolution due to the multiple tectonic events having taken place in deep basins (Zhang et al 2000;He et al 2005), (b) the difficulty in evaluating the resource potential and relative contribution due to the complex sources and evolution processes of deep petroleum (Barker 1990;Mango 1991;Dominé et al 1998;Zhao et al 2001;Jin et al 2002;Zhao et al 2005;Darouich et al 2006;Huang et al 2012;Pang et al 2014a), (c) the difficulty in predicting and evaluating favorable targets due to the complex genesis and distribution of deep, relatively high-porosity and highpermeability reservoirs (Surdam et al 1984;Ezat 1997;Dolbier 2001;Rossi et al 2001;Moretti et al 2002;Lin et al 2012), and (d) the difficulty in predicting and evaluating the petroleum possibility in deposition targets due to the complex deposition mechanism and development pattern of deep petroleum (Luo et al , 2007Ma and Chu 2008;Pang et al 2008). All these problems provide a tremendous challenge to deep petroleum exploration.…”

Section: Introductionmentioning

confidence: 99%

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Petroleum geology features and research developments of hydrocarbon accumulation in deep petroliferous basins

2015

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As petroleum exploration advances and as most of the oil-gas reservoirs in shallow layers have been explored, petroleum exploration starts to move toward deep basins, which has become an inevitable choice. In this paper, the petroleum geology features and research progress on oil-gas reservoirs in deep petroliferous basins across the world are characterized by using the latest results of worldwide deep petroleum exploration. Research has demonstrated that the deep petroleum shows ten major geological features. (1) While oil-gas reservoirs have been discovered in many different types of deep petroliferous basins, most have been discovered in low heat flux deep basins. (2) Many types of petroliferous traps are developed in deep basins, and tight oil-gas reservoirs in deep basin traps are arousing increasing attention. (3) Deep petroleum normally has more natural gas than liquid oil, and the natural gas ratio increases with the burial depth. (4) The residual organic matter in deep source rocks reduces but the hydrocarbon expulsion rate and efficiency increase with the burial depth. (5) There are many types of rocks in deep hydrocarbon reservoirs, and most are clastic rocks and carbonates. (6) The age of deep hydrocarbon reservoirs is widely different, but those recently discovered are predominantly Paleogene and Upper Paleozoic. (7) The porosity and permeability of deep hydrocarbon reservoirs differ widely, but they vary in a regular way with lithology and burial depth. (8) The temperatures of deep oil-gas reservoirs are widely different, but they typically vary with the burial depth and basin geothermal gradient. (9) The pressures of deep oil-gas reservoirs differ significantly, but they typically vary with burial depth, genesis, and evolution period. (10) Deep oil-gas reservoirs may exist with or without a cap, and those without a cap are typically of unconventional genesis. Over the past decade, six major steps have been made in the understanding of deep hydrocarbon reservoir formation. (1) Deep petroleum in petroliferous basins has multiple sources and many different genetic mechanisms. (2) There are high-porosity, high-permeability reservoirs in deep basins, the formation of which is associated with tectonic events and subsurface fluid movement. (3) Capillary pressure differences inside and outside the target reservoir are the principal driving force of hydrocarbon enrichment in deep basins. (4) There are three dynamic boundaries for deep oil-gas reservoirs; a buoyancy-controlled threshold, hydrocarbon accumulation limits, and the upper limit of hydrocarbon generation. (5) The formation and distribution of deep hydrocarbon reservoirs are controlled by free, limited, and bound fluid dynamic fields. And (6) tight conventional, tight deep, tight superimposed, and related reconstructed hydrocarbon reservoirs formed in deep-limited fluid dynamic fields have great resource potential and vast scope for exploration. Compared with middle-shallow strata, the petroleum geology and accumulation in deep basins are...

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Section: Genetic Mechanisms and Preservation Conditions Of Deep-buriementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Petroleum geology features and research developments of hydrocarbon accumulation in deep petroliferous basins

2015

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“…The Mg-poor nature of the eogenetic, Type I siderite (Table 2) suggests precipitation from meteoric pore waters (Mozley, 1989). Conversely, Types II and IV siderite indicates precipitation from pore waters with high Mg concentrations, in other words it is either of marine (Mozley, 1989) or from evolved formation water Morad et al, 1994;Rezaee and Schulz-Rojah, 1998;Rossi et al, 2001). Types II and IV siderite either precipitate and engulf quartz overgrowths and illite (i.e.…”

Section: Paragenesis and Origin Of Siderite Cementsmentioning

confidence: 99%

Origin and timing of siderite cementation in Upper Ordovician glaciogenic sandstones from the Murzuq basin, SW Libya

El‐Ghali

Tajori

Mansurbeg

et al. 2006

Marine and Petroleum Geology

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“…Carbonate cements are diagenetic products widespread in clastic rocks, and are frequently encountered in clastic depositional sequences within different types of sedimentary basins in China and throughout the world (Boles, 1998;Antar and Earle, 2001;Carlos et al, 2001;Sun Yushan et al, 2002). The mineral compositions of carbonate cements are mainly calcite, ferriferous calcite, siderite, dolomite and ankerite.…”

Section: Introductionmentioning

confidence: 99%

“…Multiple-phase carbonate cements could record the variation of fluid composition during their formation in the diagenetic process (Carlos et al, 2001), especially the carbon isotopes could constrain the carbon sources in diagenetic fluid (Macaulay et al, 1993;Mostafa et al, 2001), e.g. the į 13 C values of early dolomite vary from +6.2‰ to +11.5‰, implying that the dolomite was mainly formed in the reducing environment where methane could fractionation out light carbon isotope firstly, and the heavier isotope ( 13 C) would be enriched in porous fluid (Coleman et al, 1986).…”

Section: Introductionmentioning

confidence: 99%

Carbon and oxygen isotopic composition of carbonate cements of different phases in terrigenous siliciclastic reservoirs and significance for their origin: A case study from sandstones of the Triassic Yanchang Formation, southwestern Ordos Basin, China

et al. 2008

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Early carbonate cements in the Yanchang Formation sandstones are composed mainly of calcite with relatively heavier carbon isotope (their į 18 O values range from -0.3‰--0.1‰) and lighter oxygen isotope (their į 18 O values range from -22.1‰--19.5‰). Generally, they are closely related to the direct precipitation of oversaturated calcium carbonate from alkaline lake water. This kind of cementation plays an important role in enhancing the anti-compaction ability of sandstones, preserving intragranular volume and providing the mass basis for later dissolution caused by acidic fluid flow to produce secondary porosity. Ferriferous calcites are characterized by relatively light carbon isotope with į 13 C values ranging from -8.02‰ to -3.23‰, and lighter oxygen isotope with į 18 O values ranging from -22.9‰ to -19.7‰, which is obviously related to the decarboxylation of organic matter during the late period of early diagenesis to the early period of late diagenesis. As the mid-late diagenetic products, ferriferous calcites in the study area are considered as the characteristic authigenic minerals for indicating large-scaled hydrocarbon influx and migration within the clastic reservoir. The late ankerite is relatively heavy in carbon isotope with į 13 C values ranging from -1.92‰ to -0.84‰, and shows a wide range of variations in oxygen isotopic composition, with į 18 O values ranging from -20.5‰ to -12.6‰. They are believed to have nothing to do with decarboxylation, but the previously formed marine carbonate rock fragments may serve as the chief carbon source for their precipitation, and the alkaline diagenetic environment at the mid-late stage would promote this process.

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Facies-Related Diagenesis and Multiphase Siderite Cementation and Dissolution in the Reservoir Sandstones of the Khatatba Formation, Egypt's Western Desert

Cited by 114 publications

References 33 publications

Petroleum geology features and research developments of hydrocarbon accumulation in deep petroliferous basins

Petroleum geology features and research developments of hydrocarbon accumulation in deep petroliferous basins

Origin and timing of siderite cementation in Upper Ordovician glaciogenic sandstones from the Murzuq basin, SW Libya

Carbon and oxygen isotopic composition of carbonate cements of different phases in terrigenous siliciclastic reservoirs and significance for their origin: A case study from sandstones of the Triassic Yanchang Formation, southwestern Ordos Basin, China

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