Characteristics of Geotemperature-Geopressure System of the Qianjiang Formation in the Qianjiang Depression and Their Relationship with Petroleum Accumulation
详细信息
- 责任者：Fu Xin (Key Laboratory of Tectonics and Petroleum Resources ; Ministry of Education ; China University of Geosciences ; Wuhan 430074 ; China ) ; Ye Jiaren
- 刊名：Earth Science
- 出版年：2012
- 卷期：37(4)
- 关键词：温压条件 ; P-T conditions ; 油气藏形成 ; reservoir formation ; 潜江凹陷 ; Qianjiang Sag
- 页码：p.860-868
- 图表：4 illus., 3 tables, 11 refs.
- 分类号：1003
- issnNo：ISSN1000-2383
- isbnNo：CN42-1233/P
摘要
///Based on the measured temperature, pressure and acoustic log data of more than two hundred wells, the distribution characteristics of geothermal field, geopressure field and the geothermal-geopressure system of the Qianjiang Formation in the Qianjiang Depression are analyzed by using the theory of geothermal-geopressure system. The results show that the Banghu and Zhouji syncline belts have higher geothermal gradient, which is favorable to the maturation of the Qianjiang Formation source rock expulsion. The present pressures of the Qianjiang Formation and stones mostly belong to normal range, whereas the deep Qianjiang Formation mudstones present uncompaction which enhanced its seal ability. In vertical, the T-P system of the Qianjiang Formation includes two kinds of static pressure and overpressure.