Salt emplacement and its impact on the thermal matibe uration of source rocks: Application of a modified 1-D thermal indicator tomography
- Univ. of South Carolina, Columbia (United States)
The presence of salt in various shapes in the subsurface can have a significant impact on the subsurface temperature distribution and thermal maturation of source rocks, due to the contrast in thermal conductivity between salt and typical sedimentary formations. An anomaly can be induced in reconstruction of the thermal and hydrocarbon generation histories for the basin when contrasting the temperature data and maturity markers from salt structures with the areas distant from salt. Results of using an updated thermal indicator tomography 1-D modeling system that deals with salt emplacement demonstrate that a thermal anomaly and excess maturity can be caused solely by the presence of a salt layer. Further, the timing of salt emplacement and the variation of salt thickness can be determined. As a case history, the technique is applied in the Sogne basin Lulu 1 well, located in the northeast part of the Danish Central graben. By following the regional heat flow pattern for the Sogne basin and considering the effect of salt (maximum thickness about 3,000 m) in the well on thermal maturity anomalies, the modeled maturity and hydrocarbon generation become more reliable and accurate.
- OSTI ID:
- 5576069
- Report Number(s):
- CONF-910403-; CODEN: AABUD
- Journal Information:
- AAPG Bulletin (American Association of Petroleum Geologists); (United States), Vol. 75:3; Conference: Annual meeting of the American Association of Petroleum Geologists (AAPG), Dallas, TX (United States), 7-10 Apr 1991; ISSN 0149-1423
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
03 NATURAL GAS
DENMARK
SEDIMENTARY BASINS
SALT DEPOSITS
THERMAL CONDUCTIVITY
HEAT FLOW
SOURCE ROCKS
MATURATION
ENVIRONMENTAL TRANSPORT
GEOLOGIC MODELS
GEOTHERMOMETERS
GEOTHERMOMETRY
NATURAL GAS
PETROLEUM
TEMPERATURE GRADIENTS
THERMAL CONDUCTION
DEVELOPED COUNTRIES
ENERGY SOURCES
ENERGY TRANSFER
EUROPE
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
HEAT TRANSFER
MASS TRANSFER
MEASURING INSTRUMENTS
PHYSICAL PROPERTIES
SCANDINAVIA
THERMODYNAMIC PROPERTIES
THERMOMETERS
020200* - Petroleum- Reserves
Geology
& Exploration
030200 - Natural Gas- Reserves
Geology
& Exploration