CHARACTERISTICSOFELUIDPRESSUREINTHETERTIARYDAMINTUNSUB-BASINOFLIAOHEBASININNORTHCHINA
- 出版年：2003
- 作者：YE Jia-ren；HAO Fang； CHEN ban-yu；CHEN Zhen-yan
- 单位1：Facultyof Earth Resources, China University of Geosciences, Wuhan 430074
- 出生年：1966
- 语种：英文
- 作者关键词：pressure distribution; pressure evolution; intensity of overpressure; Damintun sub-basin
- 起始页：83
- 总页数：12
- 刊名：海洋地质与第四纪地质
- 是否内版：否
- 刊频：季刊
- 创刊时间：1981
- 主办单位：地质矿产部海洋地质研究所；青岛第四纪地质研究中心
- 主编：张光威
- 地址：青岛福州路62号
- 邮编：266071
- 电子信箱：gwzhang@qd-public.sd.cninfo.net
- 网址：Http://HYDZ.Chinajournal.net.cn
- 卷：23
- 期：4
摘要
The Ｄamintun sub-basin is one of the four sub-hasins in the Liaohe basin in North China, and regarded as a riftbasin initiated in the Palogene．Syllthe-sizing the data from boreholes, well tests and seismic surveys, the characteristicsof pressure of the Damintun sub-basin are discussed in detail. From the data of sonic logs in 57 wells, shale in theDamintun sub-basin could be of normally pressured, overpressured or highly overpressured characteristics. From 391 pres-sure measurements from 152 wells， pressure-depth gradient in oil-producing intervals is near to unity in general. The flu-id-pressures, excess pressures and pressure coefficients in 47 representative seismic profiles were predicted using seismicmethods. The resultant pressure profiles showed normal pressure, slight overpressure and intense overpressure increasingwith depth. Using the basic principles of fluid pressure evolution and data from drilling, lithology and well tests, the pres-sure evolution in profiles was restored. It showed that the pressure evolution can be divided into three stages of initial over-pressure accumulation, partly overpressure dissipation and overpressure re-accumulation. The intensities of abnormal pres-sures in the Damintun sub-basin were less than those in other areas in the Bohai Bay basin.