海洋地质与第四纪地质2003，Vol.23Issue(4)：83-94,12.
辽河盆地大民屯凹陷流体压力特征
CHARACTERISTICS OF FLUID PRESSURE IN THE TERTIARY DAMINTUN SUB-BASIN OF LIAOHE BASIN IN NORTH CHINA
摘要
Abstract
The Damintun sub-basin is one of the four sub-basins in the Liaohe basin in North China, and regarded as a rift basin initiated in the Paleogene. Synthesizing the data from boreholes, well tests and seismic surveys, the characteristics of pressure of the Damintun sub-basin are discussed in detail.From the data of sonic logs in 57 wells, shale in the Damintun sub-basin could be of normally pressured, overpressured or highly overpressured characteristics. From 391 pressure measurements from 152 wells, pressure-depth gradient in oil-producing intervals is near to unity in general. The fluid-pressures, excess pressures and pressure coefficients in 47 representative seismic profiles were predicted using seismic methods. The resultant pressure profiles showed normal pressure, slight overpressure and intense overpressure increasing with depth. Using the basic principles of fluid pressure evolution and data from drilling, lithology and well tests,the pressure evolution in profiles was restored. It showed that the pressure evolution can be divided into three stages of initial overpressure accumulation,partly overpressure dissipation and overpressure re-accumulation. The intensities of abnormal pressures in the Damintun sub-basin were less than those in other areas in the Bohai Bay basin.关键词
压力分布/压力演化/超压强度/大民屯凹陷Key words
pressure distribution/pressure evolution/intensity of overpressure/Damintun sub-basin分类
天文与地球科学引用本文复制引用
叶加仁,郝芳,陈建渝,陈振岩..辽河盆地大民屯凹陷流体压力特征[J].海洋地质与第四纪地质,2003,23(4):83-94,12.基金项目
This study is supported by the National Natural Science Foundation of China (No.40172051) and the Foundation for University Key Teacher by the Ministry of Education in China (No.GG-170-10491-1460). （No.40172051）
