Diagenesis of the IV oil reservoirs of the Pliocene Xiayoushashan Formation in the Zha-X well area, Qaidam Basin, Qinghai

LI Jun; HU Guangming; LI Qiang; HU Chenyu; XU Mali; LI Jiyong; LI Hanyang

Sedimentary Geology and Tethyan Geology > 2019 > 39(3): 65-72.

LI Jun, HU Guangming, LI Qiang, HU Chenyu, XU Mali, LI Jiyong, LI Hanyang. Diagenesis of the IV oil reservoirs of the Pliocene Xiayoushashan Formation in the Zha-X well area, Qaidam Basin, Qinghai[J]. Sedimentary Geology and Tethyan Geology, 2019, 39(3): 65-72.

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Diagenesis of the IV oil reservoirs of the Pliocene Xiayoushashan Formation in the Zha-X well area, Qaidam Basin, Qinghai

1. School of Geosciences, Yangtze University, Wuhan 430100, Hubei, China;
2. Research Institute of Petroleum Exploration and Development, Qinghai Oil Field Company, CNPC, Dunhuang 736202, Gansu, China

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Received Date: April 14, 2019
Revised Date: July 16, 2019
Published Date: September 29, 2019

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Abstract

Abstract

The Zha-X well area in the Qaidam Basin, Qinghai is currently interpreted as the main production area in the Zhahaquan block, and also an important potential area for the future production. The integrated studies show that the IV oil reservoirs of the Pliocene Xiayoushashan Formation in the Zha-X well area have mesoporosity and moderate to low permeability and are assigned to the anadiagenetic A stage. The diagenetic types include compaction, cementation and dissolution. The compaction may exert the limited effects on the physical properties of the reservoir rocks. The cementation is responsible for the decrease of the porosity of the reservoir rocks while the dissolution may have constructive effects for the generation of the secondary porosity of the reservoir rocks in the study area.
- Qaidam Basin,
- Zhahaquan,
- IV oil reservoirs,
- diagenesis,
- diagenetic stage

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Diagenesis of the IV oil reservoirs of the Pliocene Xiayoushashan Formation in the Zha-X well area, Qaidam Basin, Qinghai

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