JIANG Jian-qun, LI Jun, SHI Jian-nan, LI Ming-kui. Geothermal Characteristics of Damingtun sag and Its Significance for Petroleum Accumulation[J]. Acta Sedimentologica Sinica, 2004, 22(3): 541-546.
| Citation:
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JIANG Jian-qun, LI Jun, SHI Jian-nan, LI Ming-kui. Geothermal Characteristics of Damingtun sag and Its Significance for Petroleum Accumulation[J]. Acta Sedimentologica Sinica, 2004, 22(3): 541-546.
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Geothermal Characteristics of Damingtun sag and Its Significance for Petroleum Accumulation
- 1.
Faculty of Natural Resource and Information Technology, Petroleum University, Changping, Beijing 102249;
- 2.
Liaohe Oilfield Branch Company, PetroChina, Panjing, Liaoning 124010
- Received Date: 2003-07-16
- Rev Recd Date:
2003-10-29
- Publish Date:
2004-09-10
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Abstract
The present temperature has been studied with testing data and the paleotemperature has been restored with fission track in apatite and fluid inclusion in Damingtun sag. The thermal history has been displayed by the model of EasyRo and the comparison has been carried out with East sag and West sag. Conclusion has been drawn as follows: (1) The present geothermal gradient is low, the average is 2.9℃/100m. (2) The paleotemperature restored by fission track in apatite shows that paleotemperature is relatively high,and that of Anfutun sag is 4.07 ℃/100m while that of Rongshenpu is 3.6℃/100m. (3) The homogenization temperature of fluid inclusion shows that the thermal fluid was active. The filling model of Anfutun sag features with high pour point oil is episodic while that of Rongshengpu sag features with normal oil is the combination of episodic movement under the overpressure and the relative slow movement forced by buoyancy. (4). The thermal history difference exists between Damingtun sag and East sag and West sag. The former features with low thermal evolution as a whole, which is favarable for the preservation of high pout point reservoir.
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