Geology of the Gladys McCall Geopressured-Geothermal Prospect, Cameron Parish, Louisiana

John, Chacko J.

doi:10.1115/1.3231390

Cited by 8 publications

(6 citation statements)

References 11 publications

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“…The origin of the heavy oil recovered from the Parcperdue and Gladys McCall wells is not known. Possible mechanisms cited are remobilization of dead or irreducible oil in the formation, oil coning from thin layers, soluble hydrocarbons in the brine, and oil from adjacent shales during periods of pressure drawdown (Hamilton and Stanley 1983;John 1988).…”

Section: Adjustmentsmentioning

confidence: 99%

Technical support for geopressured-geothermal well activities in Louisiana

Wrighton¹,

Debout²,

Carver³

et al. 1991

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This report describes environmental activities carried out by Louisiana State University (LSU) under U.S. Department of Energy Contract DE-FC07-85NV10425 for the period 1 December 1988 through 31 December 1990. Other aspects of the LSU technical support program completed under prior contracts were covered in final form in reports preceding this one. During the contract period, the Louisiana Geological Survey monitored microseismic activity, and land surface subsidence at three designed geopressured-geothermal test well sites in Louisiana and Texas. Geologic studies around well sites also continued. In addition, preliminary co-location studies of heavy oil occurrences together with geopressured-geothermal fluids in Louisiana were initiated. Don Stevenson supervised microearthquake monitoring activities, subsidence studies and assisted in contract coordination, which was handled by C. G. Groat. Geologic studies and preliminary co-location work was camed out by Chacko John. This report is a progress report in the sense that it discusses program components, provides data, and presents preliminary interpretations. A detailed report on co-location of medium-to-heavy oil with geopressured brine resources in south Louisiana will be provided in the next annual report. The environmental monitoring, geologic, and co-location tasks as described in our contract continues and will be the subject of subsequent annual reports.

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Section: Adjustmentsmentioning

confidence: 99%

Technical support for geopressured-geothermal well activities in Louisiana

Wrighton¹,

Debout²,

Carver³

et al. 1991

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“…In general the top o f "In the geopressured zones, subsurface temperatures of 300°F (149°C) occur at depths of 13,000 to 15,000 ft in west Louisiana and the east Texas Gulf Coast area, and at 15,000 to 18,000 ft in east Louisiana. generally decreases uniformly with depth (Loucks et al, 1979), it is not uncommon to see wide local variations in porosity and permeability at any particular depth because of variations in original sand composition, fluid movement and chemistry, geopressure, temperature, and effects of digenesis (John, 1988). 20,000 ppm have been found in the geopressured zones in different areas (Bebout & Gutierrez, 1981) . '…”

Section: W I T H T H E Development O F T H E M I S S I S S I P P I Emmentioning

confidence: 99%

The feasibility of recovering medium to heavy oil using geopressured- geothermal fluids

Wys¹,

Kimmell²,

Hart³

et al. 1991

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The feasibility, economics and environmental concerns of producing more domestic oil using thermal enhanced oil recovery (TEOR) are reviewed and the unique nature of geopressured-geothermal (GPGT) fluids for thermal recovery are outlined. Current methods of TEOR are briefly discussed and it is noted that these methods are presently under scrutiny by both federal and state air quality agencies; and moreover, they often involve costly operational and mechanical problems associated with heating water on the surface for injection into the target reservoir. The characteristics of the GPGT resources as seen through previous Department of Energy (DOE) studies from sites in Louisiana and Texas are discussed. These studies indicate sufficient quantities of GPGT fluids can be produced to sustain a TEOR project. The Gladys McCall Well can produce 25,000 to 40,000 bpd for 5 t o 7 years at temperatures of about 275°F (135°C). reservoir pressure is 12,784 psia and the brine chlorinity 57,000 mg/L with a total dissolved solids (TDS) content o f 95,000 mg/L. Dissolved gas was about 25 scf/bbl o f water. The Pleasant Bayou Well demonstrated similar temperatures, pressures (11,000 psi), salinity (70,000 mg/L), dissolved gas, and water production life but the TDS content was higher (127,000 mg/L). Hulin Well showed higher temperature (300-375°F; 149-191°C) total dissolved solids of 195,000 mg/L and a gas content of about 34 scf/bbl. The chlorinity was 11,000 mg/L and the shut-in wellhead pressure was 7,200 psi. The Pleasant Bayou Well suggests that practical production rates of <20,000 bpd can avoid sanding problems. The The The Alworth Field in the south Texas Mirando Trend is proposed as a TEOR pilot site. The temperatures of the Upper Wilcox GPGT fluids in this region range from 350 to >500"F (177 to >26OoC), and salinities are in the range of 3,600 to 70,000 mg/L. The pressures are from 1000 to 3,500 psia flowing wellhead pressure. the Jackson and Yegua sandstones of the upper Eocene Epoch.

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“…1 well which lies at the western edge of the Rockefeller Wildlife Refuge about 55 miles southeast of Lake Charles in Cameron Parish, Louisiana. The geology of the Gladys McCall prospect was reviewed in detail by John (1988). The stratigraphic section seen in the borehole consists of an interbedded sequence of relatively thick sandstones and thin shales.…”

Section: Introductionmentioning

confidence: 99%