Distribution of Overpressure Zones in Deep Sub-Sag Area in Hinterland of Junggar Basin

• 责任者：Liu Chuanhu (Xinjiang Center of Exploration and Exploitation ; Shengli Oilfield Company Ltd. ; Sinopec ; Dongying 257000 ; China) ; Dong Chenqiang
• 刊名：Xinjiang Petroleum Geology
• 出版年：2010
• 卷期：31(1)
• 关键词：超压 ; overpressure ; 准噶尔盆地 ; Junggar Basin
• 页码：p.1-3
• 图表：3 illus., 5 refs.
• 分类号：1003
• issnNo：ISSN1001-3873
• isbnNo：CN65-1107/TE

The drilling data and the history of organic matter thermal evolution and overpressure evolution show that the deep sub-sag in hinterland of Junggar Basin area is characterized by overpressure caused by thermal pressurization of hydrocarbon generation and the fluid transmission communicating with the deep overpressure system. The overpressure fluid in this deep sub-sag area flows toward the top interface of high-pressure compartment followed by breakthrough and accumulation, which may occur in range from 200 m above the top interface and 100 m below it as a favorable interval for hydrocarbon accumulation. The outside of the compartment is favorable for crude oil accumulation and the inside of it for natural gas accumulation.