Investigation of the thermal gradient history of the thrace basın, nw Turkey, by using a modified easy %ro maturity model

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2005

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Huvaz, Özkan

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Thermal maturity modeling is widely used in basin modeling. Of the available models, Easy%Ro has gained acceptance. Thermal gradients (TG) at seventy wells in the Thrace Basin are calibrated against vitrinite reflectance (%Ro). A 90% confidence interval is used to assess the uncertainty. Best paleo-TG are obtained from the MSR curves. Comparison of the paleo-TG with the actual ones showed that thermal regime of the Thrace Basin did not dramatically change during geologic history. A correlation between geological and thermal properties of the basin is established. Thermal regime of the Thrace Basin is controlled by 1) basement edge affect; 2) crustal thickness variations ad basement heat flow; 3) lateral thermal conductivity variations within the stratigraphic column; 4) transient heat flow affect; and 5) influence of the tectonic features. Basement edge affect is traced at the steep northern margin. Central part of the basin demonstrates lower TG. THe Eocene Ceylan Formation with relatively lower thermal conductivity plays a thermal reducing role. Areas of high sediment influx are associated with low TG due to the transient effect of the immature sediments. Fault systems of the Thrace Basin do not possibly have influence on paleo-thermal gradients.

Subject Keywords

Geology.

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http://etd.lib.metu.edu.tr/upload/12606250/index.pdf
https://hdl.handle.net/11511/15281

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

Ö. Huvaz, “Investigation of the thermal gradient history of the thrace basın, nw Turkey, by using a modified easy %ro maturity model,” Ph.D. - Doctoral Program, Middle East Technical University, 2005.