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| Entrenched valley depositional system and advantageous exploration direction of Chepaizi area in Junggar Basin |
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XIANG Kui1,2,3
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(1. School of Resource and Information Technology in China University of Petroleum , Beijing 102249, China;2. National Laboratory for Petroleum Resource and Prospecting, China University of Petroleum，Beijing 102249，China;3. Xinjiang Exploration & Development Center of Shengli Oilfield Branch Company,Dongying 257017, Shandong Province9 China)
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| Abstract: |
| Entrenched valley is an important depositional system in Chepaizi area in the west of Junggar Basin. Entrenched valley depositional system and advantageous exploration direction in the area were studied by analyzing the seismic reflection, sediment feature and electric feature. The results show that there are four kinds of filling styles including vertical accretion style, lateral accretion style, clutter style and composite style, three kinds of distribution styles including simple style, multi-branched style and compound-branched style, and significant seismic reflection, sediment feature and electric feature in the area. The fault-lithologic reservoir is formed easily in downthrow block of the fault and is the main reservoir type in this area. Entrenched valley system is confirmed to have satisfactory hydrocarbon show. The low stand apron in the entering-lake zone of the entrenched valley system in the east and south of the research area is the important exploitation part in the future. |
| Key words: Junggar Basin Chepaizi area depositional system entrenched valley space-time distribution exploration direction |
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