Articles

NEW CONCEPTION OF OIL AND GAS FORMATION FROM THE MARGINAL ZONE OF MASSIF-TROUGH IN NORTHWEST CHINA

Expand
  • Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou 730000

Received date: 1995-10-20

  Revised date: 1995-12-04

  Online published: 1996-05-01

Abstract

The comprehensive studies on the sedimentary settings in Jungar and Tarim Basins shown clearly that China’s northwestern was mainly sedimentary marine environments and the basements of sedimentary basins were a number of separated ancient crystalline massifs covered by sea water,among which there were palaeo-ocean trough or/and narrow palaeo-ocean trough.The marginal basins along the trough between different massifs or the marginal zone between massif and ocean trough are favorable for oil and gas generation. During the processes of mountain-building with the compressional folding to the ocean trough,the ancient system of MassifTrough transformed from the Palaeozoic marine environments to the Meso-Cenozoic continental sedimentary system of Mountain-Basin, during which time the ancient series of marine source rocks deposited in the marginal basins were bund under the mountains around the basins. And the oil and gas generated from the source rocks have been partly migrated and accumulated into reservoir beds in the basins, which consists of the oil and gas accumulation type so-called"out-generating and inner-reservoiring". Within this kind of basins, there coexist of two series of source rocks: marine one and continental one, and two kinds of combination complexes of petroleum generating and reservoiring: "inner generating-inner reservoiring" and "out generating-inner reservoiring". This new theory or model of petroleum formation and occurrences has been proved not only by the result of our recent petroleum geochemical research but also by the practice of exploration in some regions. The new conception about petroleum generation from Massif-Trough’s marginal zone has been out of the traditional concepts to study on the formation and occurrence of the Palaeozoic petroleum limited by the modern basins, which could be to increase potential petroleum resources discovered and to enlarge new fields for finding oils and gases in Northwest China so that the highly meaningful importance should be come out.

Cite this article

Luo Binjie; Zheng Guodong; Yang Xinhua; Duan Yi . NEW CONCEPTION OF OIL AND GAS FORMATION FROM THE MARGINAL ZONE OF MASSIF-TROUGH IN NORTHWEST CHINA[J]. Advances in Earth Science, 1996 , 11(3) : 259 -264 . DOI: 10.11867/j.issn.1001-8166.1996.03.0259

References

[1]孟自芳,郑建京.极移曲线及次级构造单元相对运动的古地滋研究.周清杰,郑建京主编.塔里木盆地构造分析.北京:科学出版社,1990.
[2]周志毅,陈王基.塔里木盆地生物地层和地质演化.北京:科学出版社,1990.
[3]罗斌杰,赵生才,林禾杰,等.我国西北区油气形成的盆要棋式—地块海棺与山系盆地的油气形成(以准噶尔盆地为例).准噶尔盆地油气地质综合研究.兰州:甘肃科学技术出版社,1992.1-12.
[4]罗斌杰,吴志勇,王有孝,等.准格尔盆地西北缘原油特征及形成环境.准格尔盆地油气地质综合研究.兰州:甘肃科学技术出版社,1992. 196- 208.
[5]黄华芳,郑国东,方国庆,等.酒西盆地南缘推覆构造及含油领域.石油与天然气地质,1993.14(3).
[6]Shen Jianzhong, Zhuo Huiying and Hu Boliang. A Discussion on Geochemical Characteriatica and Qrigin of Natural Gases from the Tarim Basin. 15th Meeting of the European Association of Organic Geochemists, September 1991. University of Manchester, England,1991.

Outlines

/