Oil & Gas Geology ›› 2014, Vol. 35 ›› Issue (4): 486-493.doi: 10.11743/ogg20140407

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Reconstruction of blanket sand porosity during hydrocarbon charging in the Jurassic Sangonghe Formation of Block 1 in Central Junggar Basin and its significance

Chen Lin, Xu Tao, Shi Haoguo, Zhang Yuejing, Zhang Min, Xiu Jinlei   

  1. New Prospect Research Institute, SINOPEC Shengli Oilfield Company, Dongying, Shandong 257000, China
  • Received:2013-05-07 Revised:2014-05-15 Online:2014-08-08 Published:2014-08-28

Abstract:

By using thin section and physical property data and in combination with the burial history and hydrocarbon charging history, this paper studied the diagenetic characteristics of the blanket sand in the hydrocarbon charging period, and established the coupling relationship between reservoir diagenetic sequence and the hydrocarbon charging. The porosity of blanket sand during the hydrocarbon charging in the lower 2nd member of the Jurassic Sangonghe Fornation in Block 1 in central Junggar Basin was quantitatively reconstructed by using the compaction trend and inversion back stripping methods respectively. The results show that the blanket sand were shallow buried and had good physical properties during the critical hydrocarbon charging period, thus could be good carrrier beds and reservoirs. The blanket sand played a critical role in hydrocarbon transportation and the study area has great exploration potential.

Key words: diagenetic evolution, physical property reconstruction, blanket sand, Sangonghe Formation, Junggar Basin

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