LITHOLOGIC RESERVOIRS

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  • Online:2008-09-15 Published:2008-09-15

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Abstract:

Based on the results of several analytical methods, the reservoir characteristics of Lower Jurassic Sangonghe
Formation in Shawodi area of Junggar basin are analyzed. The results show that the reservoir has low compositional
maturity and high textural maturity, with low%mid porosity and low&mid permeability. The porosity types are mainly
primary intergranular pore, corrosion’modification intergranular pore and intragranular corrosion pore. The throat is
mainly micro(throat. The diageneses mainly include compaction, cementation, dissolution and displacement. The
diagenetic evolution is in the middle diagenetic stage. During this period, the compaction and cementation cause the
reservoir porosity to decrease about 24.0! and the dissolution causes the porosity to increase about 3.0!.

Key words: Archie formula, water saturation, shaly formation, saturation exponent

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