Discovery of Pre-Jurassic Cannel-Boghead with Its Geological Significance in Turpan-Hami Basin,Xinjiang

More than ten year's advanced research work has been done by numbers of outstanding geologists, so that theresearch of coal-derived hydrocarbon for Turpan-Hami Basin has developped a lot. However, gemetic potential for Jurassic coal-system mudstone and coal is not enough to explain the formatic scale of oil-gas accumulation of Turpan-Hami Basin. The cannel-boghead, discovered firstly in Triassic in Keyayi depression in western Turpan-Hami basin, is the best source rock with the characteristics of good type, high quality and great genetic-potential. The discovery of cannel-boghead has not only main significance in evaluating hydrocarbon-generated prospect of preJurassic in this area but has enlightenment in analyzing diversify of coal-derived hydrocarbon types. The results of the synthetical research demonstrate that the cannel-boghead, probably, either is one of the generating hydrocarbon materials of pre-Jurassic oil accumulation in Tainan depression, or makes contribution to oil-gas accumulation of Jurassic. Fairly abundant cannel-boghead distributed in deep lake with semiarid, bracksh, and strong reduction in Keyayi depression and Taibei depression in Middle Trassic, in Qiudong area of Taibei depression in Early Jurassic as well as in northern Taibei sag in late Early Permian. These cannel-boghead and lacustrine mudstones all provided hydrocarbon-generated matters to oil-gas accumulation of Turpan - Hami Basin. The hydrocarbon-generated condition of Turpan-Hami Basin is very similar with that of Jungger Basin. Besiders, the mantle matters probably comtribute greatly on forming oil-gas accumulation of Turpan-Hami Basin.

Received Date: 1999-06-23

Rev Recd Date: 1999-06-23

Publish Date: 2000-08-10

Key words:

Abstract: More than ten year's advanced research work has been done by numbers of outstanding geologists, so that theresearch of coal-derived hydrocarbon for Turpan-Hami Basin has developped a lot. However, gemetic potential for Jurassic coal-system mudstone and coal is not enough to explain the formatic scale of oil-gas accumulation of Turpan-Hami Basin. The cannel-boghead, discovered firstly in Triassic in Keyayi depression in western Turpan-Hami basin, is the best source rock with the characteristics of good type, high quality and great genetic-potential. The discovery of cannel-boghead has not only main significance in evaluating hydrocarbon-generated prospect of preJurassic in this area but has enlightenment in analyzing diversify of coal-derived hydrocarbon types. The results of the synthetical research demonstrate that the cannel-boghead, probably, either is one of the generating hydrocarbon materials of pre-Jurassic oil accumulation in Tainan depression, or makes contribution to oil-gas accumulation of Jurassic. Fairly abundant cannel-boghead distributed in deep lake with semiarid, bracksh, and strong reduction in Keyayi depression and Taibei depression in Middle Trassic, in Qiudong area of Taibei depression in Early Jurassic as well as in northern Taibei sag in late Early Permian. These cannel-boghead and lacustrine mudstones all provided hydrocarbon-generated matters to oil-gas accumulation of Turpan - Hami Basin. The hydrocarbon-generated condition of Turpan-Hami Basin is very similar with that of Jungger Basin. Besiders, the mantle matters probably comtribute greatly on forming oil-gas accumulation of Turpan-Hami Basin.

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Discovery of Pre-Jurassic Cannel-Boghead with Its Geological Significance in Turpan-Hami Basin,Xinjiang

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