Petroleum geologic characteristics and exploration orientation in Halahatang Depression of Tabei uplift

  • LIU Juan ,
  • TIAN Jingchun ,
  • ZHANG Xiang ,
  • WANG Wenzhi
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  • 1. Research Institute of Petroleum Exploration & Development-Northwest, PetroChina, Lanzhou 730020, China; 2. Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla 841000, China

Online published: 2009-06-16

Abstract

In order to investigate the conditions of hydrocarbon accumulation, the characteristics of petroleum geology have been analyzed in Halahatang area. There developed Cambrian and Ordovician source rocks. The Middle-Upper Ordovician source rocks are good and nowmainly in the mediummature evolutionary phase. There are several series of reservoir-seal assemblages. The one consisted of Carboniferous Donghe sandstone, breccia and overlyingmudstone and limestone, and the other one consisted of Ordovician limestone and Silurian mudstone are more favorable. Palaeozoic is a nose structure in the westward plunging end of Lunnan lower uplift. The nose structure has always been in the relatively higher position of structural belt since Hercynian as the oriented region of hydrocarbon migration. Several series of cap rocks developed well, which have good conditions for late Caledonian-early Hercynian hydrocarbon preservation. The results obtained showthat there is a good exploration prospect in Halahatang area.

Cite this article

LIU Juan , TIAN Jingchun , ZHANG Xiang , WANG Wenzhi . Petroleum geologic characteristics and exploration orientation in Halahatang Depression of Tabei uplift[J]. Lithologic Reservoirs, 2009 , 21(2) : 54 -58 . DOI: 10.3969/j.issn.1673-8926.2009.02.011

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