Oil & Gas Geology ›› 2004, Vol. 25 ›› Issue (3): 294-299.doi: 10.11743/ogg20040311

Previous Articles     Next Articles

Sedimentary environment of Permian source rocks in Yili basin

Miao Jianyu1, Zhou Lifa1, Deng Kun1, Li Jianfeng1,2, Han Zhongyuan1   

  1. 1. Department of Geology, Northwest University, Xi'an, Shaanxi;
    2. Petroleum Exploration and Development Research Institute, Changqing Oilfield Compony, CNPC, Xi'an, Shaanxi
  • Received:2004-04-09 Online:2004-06-25 Published:2012-01-16

Abstract:

Based on TOC distribution, gas chromatograms of saturated hydrocarbons and types of organic matter in various source rocks, this paper studies sedimentary environments of source rocks and their effects on abundance and types of organic matter. Source rocks in Yili basin are mainly distributed in the Permian Tamuqisayi and Basiergan Formations deposited in a weakly reducing to reducing environment in temperate climate,where the water body is characterized by relatively high palaeo-salinity with faintly alkaline to alkaline aqueous medium. Sedimentation zones with strong reduction and relatively deep water body are favorable places for deposition and preservation of original organic matters, thus the source rocks have abundant organic matters of favorable types.

Key words: Permian, source rock, sedimentary environment, Yili basin

CLC Number: