摘要
地温-地压系统作为盆地流体动力场的耦合,直接控制着油气的运移和聚集。在中国不同类型含油气盆地中,地温-地压系统特征存在很大差异,依据含油气盆地深部和浅部温压系统的斜率关系,划分出3大类地温-地压系统模式:高压型复式温压系统模式(浅部地层压力为静水压力、深度地层压力表现为高压异常)、低压型复式温压系统模式(浅部地层压力为静水压力、深度地层压力表现为低压异常)和单一型温压系统模式(浅部与深部地层压力均为静水压力)。高压型复式温压系统内,浅层系统的斜率分布范围较窄,地区差异小;深层系统的斜率分布范围很宽,地区差异较大。低压型复式温压系统内,浅层系统的斜率分布范围较宽,地区差异很大;深层系统的斜率分布范围较窄,地区差异相对较小。单一型温压系统深、浅层系统的斜率一致且分布比较集中,地区差异不明显。地温-地压系统特征分析表明,高压型复式温压系统内深浅部地层连通性很差,在垂向断裂附近,深层流体向上运移动力很强;低压型复式温压系统内深浅部地层连通性较差,在垂向断裂附近,浅层流体具有向下运移的趋势;单一型温压系统内深浅部地层连通性很好,流体垂向运移动力不足。在中国3大类含油气盆地中,伸展型盆地主要发育高压型复式温压系统,低压型复式温压系统次之;挤压型盆地以高压型复式温压系统为主,也有低压型复式温压系统发育;克拉通盆地发育低压型复式温压系统或高压型复式温压系统。
As the coupling of hydrodynamic fields in petroliferous basins,a geotemperature-geopressure system（Geo-TPS） directly controls the migration and accumulation of oil and gas.Studies have showed that characteristics of the Geo-TPS in China differ greatly from one petroliferous basin to another.Based on the relationship of Geo-TPS slopes in shallow and deep formations,three types of Geo-TPS models were put forward： the high-pressure multiple Geo-TPS（HP-MGeo-TPS）,the low-pressure multiple Geo-TPS（LP-MGeo-TPS） and the single Geo-TPS（S-Geo-TPS）.As for the HP-MGeo-TPS,the slope range of the Geo-TPS is narrower in shallow formations but wider in deep formations.On the contrary,as for the LP-MGeo-TPS,the slope range of the Geo-TPS is wider in shallow formations but narrower in deep formations.And as for the S-Geo-TPS,the slope range of the Geo-TPS is relatively concentrated and regionally identical in both shallow and deep formations.A wider slope range indicates a big variation of the Geo-TPS with different basins,while a narrower slope range means a small change of the Geo-TPS with different basins.The difference of Geo-TPS characteristics suggests that a vertical connectedness in subsurface is better in the S-Geo-TPS than that either in the HP-MGeo-TPS or in the LP-MGeo-TPS.A poor connectedness may lead to an upward migration tendency of deep fluids in the HP-MGeo-TPS but a downward migration tendency of shallow fluids in the LP-MGeo-TPS along vertical fractures.Statistic data show that in China,both the HP-MGeo-TPS and the LP-MGeo-TPS develop well in extensional petroliferous basins;the HP-MGeo-TPS is more common than the LP-MGeo-TPS in compressional basins;and either the LP-MGeo-TPS or the HP-MGeo-TPS occurs in craton basins.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2012年第1期1-17,共17页
Acta Petrolei Sinica
基金
国家重点基础研究发展规划(973)项目(2009CB219408)
国家重大科技专项(2008ZX05001和2008ZX05002)资助
关键词
中国
含油气盆地
复式地温-地压系统
温压系统斜率
油气运移
China
petroliferous basin
multiple geotemperature-geopressure system
slope of geotemperature-geopressure system
oil and gas migration
作者简介
第一作者及通讯作者：刘震，男，1963年2月生，1990年获中国石油大学（北京）博士学位，现为中国石油大学（北京）教授、博士生导师，主要从事石油地质学和层序地层学基础研究和教学工作。Email：liuzhenjr@163．com
