SHI Ji-an, WANG Jin-peng, MAO Ming-lu, WANG Qi, GUO Zheng-quan, GUO Xue-lian, LU Long-fei. Reservoir Sandstone Diagenesis of Memeber 6 to 8 in Yanchang Formation (Triassic), Xifeng Oilfield, Ordos Basin[J]. Acta Sedimentologica Sinica, 2003, 21(3): 373-380.
| Citation:
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SHI Ji-an, WANG Jin-peng, MAO Ming-lu, WANG Qi, GUO Zheng-quan, GUO Xue-lian, LU Long-fei. Reservoir Sandstone Diagenesis of Memeber 6 to 8 in Yanchang Formation (Triassic), Xifeng Oilfield, Ordos Basin[J]. Acta Sedimentologica Sinica, 2003, 21(3): 373-380.
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Reservoir Sandstone Diagenesis of Memeber 6 to 8 in Yanchang Formation (Triassic), Xifeng Oilfield, Ordos Basin
- 1.
State Key Laboratory of Geochemistry, Lanzhou Institute of Geol ogy, Chinese Academy of Science, Lanzhou 730000;
- 2.
Research Institute of Exploration & Development, Changqing Oilfield Company, Petrochina,Xi'an 710004
- Received Date: 2003-01-21
- Rev Recd Date:
2003-06-21
- Publish Date:
2003-09-10
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Abstract
Reservoir sandstone of Member 6 to 8 in Yanchang Formation (Triassic) in Xifeng oilfield of Ordos basin is typical of low porosity and low permeability, which has the characteristics of fine grain size, low compositional maturity, poor roundness and good sorting. Based on thin-section observation and analyses of c lay minerals, stable isotopes and physical property, this article takes researc h on diagenetic characteristics in Member 6 to 8 of Yanchang Formation, analyses their influence on reservoir physical property and determines diagenetic stage of reservoir sandstone. Meanwhile, this article indicates that the development o f high quality reservoir is dependent on the development of clay film, hydrocabo n emplacement grain dissolution in reservoir sandstone.
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