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

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
Vol. 35, Issue 4, Pages: 486-493(2014)
Online First：08 August 2014，

Published：2014
DOI： 10.11743/ogg20140407
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DOI：

Chen Lin, Xu Tao, Shi Haoguo, et al. Reconstruction of blanket sand porosity during hydrocarbon charging in the Jurassic Sangonghe Formation of Block 1 in Central Junggar Basin and its significance[J]. 2014, 35(4): 486-493. DOI： 10.11743/ogg20140407.

摘要

综合利用岩石薄片、储层物性等资料，结合埋藏史及油气充注史研究，通过分析成藏期毯砂成岩特征，建立成岩演化序列与油气充注的对应关系，并分别采用压实趋势法与反演回剥法对准噶尔盆地中部1区块侏罗系三工河组二段下亚段[J

2（1）

]毯砂在关键成藏期的孔隙度进行了定量恢复。结果表明，在成藏关键期，毯砂埋藏浅，物性较好，可做为较好的油气输导层及储集层，表明该毯砂在成藏关键期的重要输导作用，同时明确了该区具有较大的勘探潜力。

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.