石油与天然气地质 ›› 1997, Vol. 18 ›› Issue (3): 236-242.doi: 10.11743/ogg19970314

• 论文 • 上一篇    下一篇

渤海湾盆地压力特征及超压带形成的控制因素

李熙哲, 杨玉凤, 郭小龙, 袁素华   

  1. 石油勘探开发科学研究院廊坊分院天然气所, 河北廊坊 065007
  • 收稿日期:1997-03-06 修回日期:1997-04-08 出版日期:1997-09-25 发布日期:2012-01-18

PRESSURE FEATURES AND CONTROLLING FACTORS OF OVERPRESSURE BELT FORMATION IN BOHAI BAY BASIN

Li Xizhe, Yang Yufeng, Guo Xiaolong, Yuan Suhua   

  1. Natural Gas Institute, Langfang Branch, Research Institute of Petroleum Exploration & Development, Langfang, Hebei
  • Received:1997-03-06 Revised:1997-04-08 Online:1997-09-25 Published:2012-01-18

PDF (PC)

1112

被引次数

20

摘要：

渤海湾盆地纵向上压力分段特征显着,浅部以正常静水压力为特征,深部出现超压带,其间为压力过渡带。压力过渡带厚度和超压带深度由东向西逐渐加大,与地温场呈明显的镜像关系,受区域地温场控制。压力过渡带与成岩作用关系密切(常常是钙质胶结物的增大带).洼陷区过剩压力高于隆起区;膏盐岩发育区过剩压力高于一般区。砂泥岩盖层分布区,超压形成主要受控于有机质降解作用和断层的封闭;膏盐岩盖层分布区超压形成受控于膏盐层及断层封闭的综合作用。

关键词: 渤海湾盆地, 压力, 分布特征, 地温场, 超压带, 控制因素

Abstract:

There are evident characteristics of vertical pressure segmentation in Bohai Bay Basin, that is, normal hydrostatic pressure exists in shallow part;overpressure layers appear in deep part,and transitional pressure belts lie between the first two parts. The thickness of transitional pressure belts and the depth of overpressure belts increase from east to west, existing apparent mirror image relationship with geotemperature field,and the depth of overpressure belts and the thickness of transitional belts are controlled by aerial geotemperature fields.On the other hand, the Transitional pressure belts are related to diagenesis. Excess pressure is higher in depressions than that in uplifts.Furthermore, excess pressure is higher in gyprock and salt developed areas than that in other lithologic areas.The formation of overpressure in mud sand caprock area is mainly controlled by the degradation of organic matter and sealing ability of faults;the formation of overpressure in the areas with gyprock/salt caprock is controlled by sealing ability of gyprock rock and faults.