Reservoir quality and diagenetic evolution of Upper Mississippian rocks in the Illinois Basin; influence of a regional hydrothermal fluid-flow event during late diagenesis

Pitman, Janet K.; Henry, Mitchell E.; Seyler, Beverly

doi:10.3133/pp1597

Cited by 4 publications

(6 citation statements)

References 35 publications

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“…, which restricts the character of potential bedforms to the far left of the bedform phase stability diagram (Figure 3.5). However, as all grain measurements included quartz overgrowths (typically ~10-20 thick), which are prevalent throughout the Cypress Sandstone (Pitman et al 1998), this measured 50 represents a slight overestimation, and mean original 50 may be c. 120 .…”

Section: Lithofaciesmentioning

confidence: 95%

“…The Cypress Sandstone is lithologically variable, being composed of thick sandstone in some areas and being shale-interbedded with numerous lenticular, well-cemented sandstone bodies in others. The Cypress Sandstone is predominantly sublitharenitic and subarkosic in composition (Pitman et al 1998). Two, mostly parallel, northeast-southwest trending clastic belts composed of generally thick sandstone bodies are found within the Cypress Sandstone (Figure 2.8).…”

Section: Cypress Intraformational Stratigraphymentioning

confidence: 99%

“…In a petrographic study, Pitman et al (1998) suggested that although substantial diagenesis has occurred since deposition, "original variations in permeability due to small grain size differences have been preserved" in Cypress reservoirs. An example of this is the preserved covariance of permeability and grain size (Figure 3.10).…”

Section: Implications For Reservoir Heterogeneitymentioning

confidence: 99%

“…Cypress sandstone intervals are characterized by a rather high compositional maturity consisting of quartzarenite, sublitharenite, and subarkose (Pitman et al 1998). The lower Cypress sand bodies are commonly cross-bedded (e.g., Nelson et al 2002;Howell 2017) and consist of sorted, subangular-to rounded, fine-grained quartzose sandstone with grains showing evidence of a recycled origin.…”

Section: Geophysical Log Cross-sections Aa' and Bb' Across The Clay City Consolidated Field Showing Lateral And Vertical Variation Of Thementioning

confidence: 99%

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A Nonconventional CO<sub>2</sub>-EOR Target in the Illinois Basin: Oil Reservoirs of the Thick Cypress Sandstone

Webb¹

2019

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This section describes project activities undertaken to complete geologic characterization of Noble, Kenner West, and Loudon Fields. A range of project activities were completed at each study site including stratigraphic correlation, sedimentary facies analyses, and identifying petrophysical characteristics of the reservoirs present in a specific field. Isopach maps were developed which show variation in the thickness and geometry of the thick Cypress Sandstone. This work facilitated the broader, regional geologic characterization of the Cypress Sandstone (see Section 3.4).While a range of project activities were conducted in order to complete field-scale geologic characterization, not all project activities pursuant to this goal were undertaken at each individual field. At Noble, project activities included both stratigraphic and facies analyses as well as reservoir characteristics (i.e., reservoir geometry, volumetric analysis, and isopach maps). At Kenner West, project activities included stratigraphic analysis and reservoir characteristics (i.e., reservoir geometry, volumetric analysis, and isopach maps). At Loudon, project activities were limited to stratigraphic analysis and reservoir characteristics (i.e., reservoir geometry and isopach maps). Noble Field1.4 to 1.6 million m 3 (8.5 to 9.9 million bbl) Cumulative production= 0.2 million m 3 (1.3 million bbl)Recovery efficiency= 13.2 to 15.4% Loudon Field

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Section: Lithofaciesmentioning

confidence: 95%

Section: Cypress Intraformational Stratigraphymentioning

confidence: 99%

Section: Implications For Reservoir Heterogeneitymentioning

confidence: 99%

Section: Geophysical Log Cross-sections Aa' and Bb' Across The Clay City Consolidated Field Showing Lateral And Vertical Variation Of Thementioning

confidence: 99%

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A Nonconventional CO<sub>2</sub>-EOR Target in the Illinois Basin: Oil Reservoirs of the Thick Cypress Sandstone

Webb¹

2019

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“…Besides, there are no processes in the studied reservoirs characteristic of hydrothermal systems, such as a systematic zoning of alterations towards the faults, intense quartz cementation and recrystallization, or extensive ankerite cementation (e.g. McDowell & Paces, 1985;Schiffman et al, 1985;Pitman et al, 1998;Henry & Seyler, 1998;Lima & De Ros, 2003). Quartz cementation is insignificant in the Buracica reservoirs and, although significant (average 1.3%; up to 9.7% of quartz overgrowths), is not massive in Á gua Grande reservoirs.…”

Section: Implications For Basin Evolutionmentioning

confidence: 96%

Dickite in shallow oil reservoirs from Recôncavo Basin, Brazil: diagenetic implications for basin evolution

Bóna

Dani²,

Ketzer³

et al. 2008

Clay miner.

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Fluvial and aeolian sandstones of the Sergi Formation are the most important reservoirs of the Recôncavo Basin, Brazil. Optical and scanning electron microscopy, X-ray diffraction and infrared spectroscopy revealed the occurrence of dickite, a clay mineral indicative of deep burial conditions (T >100ºC), in the shallow Buracica (630–870 m) and Água Grande (1300–1530 m) oilfields. Vermicular dickite replaces K-feldspar and plagioclase grains, and fills intra- and inter-granular pores. Its vermicular habit is a product of pseudomorphic kaolinite transformation during burial. The presence of dickite is in accordance with the intensity of compaction, post-compactional quartz cementation and δ18O values of calcite cements (T up to 109ºC). These petrological features of deep burial, as well as apatite fission-track analyses, indicate that uplift and erosion of at least 1 km, and probably >1500 m, affected the central part of the Recôncavo Basin and possibly the entire region. This uplift has not been detected previously by conventional structural and stratigraphic models.

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Using clay microporosity to improve formation evaluation in potential residual oil zones: Cypress Sandstone, Illinois Basin

Giannetta¹,

Webb²,

Butler³

et al. 2021

Bulletin

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Reservoir quality and diagenetic evolution of Upper Mississippian rocks in the Illinois Basin; influence of a regional hydrothermal fluid-flow event during late diagenesis

Cited by 4 publications

References 35 publications

A Nonconventional CO<sub>2</sub>-EOR Target in the Illinois Basin: Oil Reservoirs of the Thick Cypress Sandstone

A Nonconventional CO<sub>2</sub>-EOR Target in the Illinois Basin: Oil Reservoirs of the Thick Cypress Sandstone

Dickite in shallow oil reservoirs from Recôncavo Basin, Brazil: diagenetic implications for basin evolution

Using clay microporosity to improve formation evaluation in potential residual oil zones: Cypress Sandstone, Illinois Basin

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