西南石油大学学报(自然科学版)

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The Formation Characteristics and Exploration Potential of Tight Oil in#br# Erlian Basin

  

  1. 1. Geology Post Doctoral Station,China University of Mining & Technology,Haidian,Beijing 100083,China
    2. Exploration and Development Research Institute,Huabei Oilfield Company,PetroChina,Renqiu,Hebei 062552,China
  • Online:2016-04-11 Published:2016-04-11

Abstract:

Reservoirs in Erlian Basin are generally with low porosity and low permeability. Reservoir in the special lithologic
section and tight glutenite segment in the trough area and tectonic wings under the top of K1bt1 and K1ba is particularly dense
with air permeability less than 0.5 mD. Two types of high-quality source rocks characteristic of special lithology containing a
cloud of gray matter and clayey lacustrine mudstones developed under the top of K1bt1 and K1ba. Hydrocarbon source rock
and tight reservoir are distributed as one or interbedded layers,which is favorable for hydrocarbon migration and accumulation.
Tight reservoir has a complex pore structure,and is characteristic of low production and low pressure. With high dolomite
content and brittleness,special lithologic reservoir is of good oil-bearing and physical properties,and is favorable for fracturing.
Although a single depression is small in size,but the whole reservoir is of large scale. Predicted by oil and gas resources,tight
oil resources amount is nearly one billion. The exploration work in the future should be focused on both tight oil and lithologic
reservoirs.

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Key words: Erlian Basin, tight oil, high quality hydrocarbon source rocks, special lithologic section, tight reservoir

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