- 责任者：Ma Dewen (State Key Laboratory of Petroleum Resource and Prospecting ; China University of Petroleum ; Beijing 102249 ; China) ; Qiu Nansheng
- 刊名：Chinese Journal of Geology
- 出版年：2011
- 卷期：46(4)
- 关键词：气藏 ; gas reservoirs ; 地层压力 ; formation pressure ; 鄂尔多斯盆地 ; Ordos Basin
- 页码：p.1055-1067
- 图表：7 illus., 1 table, 24 refs.
- 分类号：1003
- issnNo：ISSN0563-5020
- isbnNo：CN11-1937/P
The effects of temperature decrease and gas dissipation on pore pressure was studied by using the SRK state equation. It was found that temperature decrease and gas dissipation were main mechanism of abnormal low formation pressure in the Sulige gas field. It showed that the higher paleotemperature of the reservoirs the greater pressure decrease due to gas dissipation and the more gas diffusion of the gas field the smaller pressure drop causing by temperature decrease. With the characteristics of low permeability and low porosity, the development of abnormal high formation pressure has great significance to the hydrocarbon migration and accumulation in this area.The decrease of formation pressure at later period was beneficial to gas preservation.