摘要
含油性定量预测是盆缘地层圈闭勘探的关键问题之一。在前人研究成果和对济阳坳陷75个区块地层油藏地质基础数据统计的基础上,依据地层油藏特征,以地层油气藏成藏动力为主线,确定了地层圈闭含油性的主控因素是储层物性、圈源距离、输导层倾角、盖储毛管压力差。地层圈闭的含油性可以用储层孔隙度下限和圈闭的含油高度来表征。通过多元回归分析,建立了济阳坳陷地层圈闭含油性定量预测模型。应用该模型对金家油田金16块含油性进行了预测,预测值与实测值相比误差仅为8%,表明建立的地层圈闭含油性预测模型具有较高的可靠性,能够实现对地层圈闭含油性钻前的定量预测。
It is one of the key problems to predict the oil-bearing property in basin marginal stratigraphic trap.On the basis of pre-vious researches and geological data statistics in 75 typical blocks in Jiyang depression,and based on the distribution characteris-tics of the stratigraphic reservoirs and oil-gas migration,main controlling factors of oil-bearing property in the reservoirs are deter-mined herein,which includes physical characteristics of the reservoirs,such as migration distance from oil source rock to traps,dip angle of transportation layers,and capillary pressure difference between reservoir and cap formation.The property can be de-scribed by the lower limit porosity of reservoir and the oil column height of the trap.A matching model,which can be used to pre-dict the oil-bearing property of the stratigraphic trap,is derived from the multiple regression of these factors above.The oil-bear-ing property of the stratigraphic trap in Jin16 block in Jinjia oilfield is predicted by means of the model constructed,and the error between predicted value and actual value is very trivial.It shows that the model is highly reliable.This research solved the key problems.The oil-bearing property of the stratigraphic trap at the margin of rift-subsidence basin can be predicted quantitatively before drilling.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2011年第1期4-6,22,共4页
Petroleum Geology and Recovery Efficiency
基金
国家科技重大专项大型油气田及煤层气开发项目"油气成藏机制与富集规律"(2008ZX05006-002)
关键词
地层圈闭
含油性
主控因素
预测模型
断陷盆地
济阳坳陷
stratigraphic trap
oil-bearing property
quantitative prediction
rift-subsidence basin
Jiyang depression City
Gansu Province
730000
China
