一种实用的砂体含油性预测方法

A comprehensive approach to predict oil-bearing capability of sand body

针对东营凹陷洼陷带沙三中浊积岩含油性差异大、优选部署难的问题,以实现高效勘探为目的,同时考虑浊积岩岩性油藏控藏理论与油田生产的实际需要,最终优选砂体埋深、砂体厚度、孔隙度、地层压力系数、距油源断层距离等5项与砂体含油性紧密相关的参数进行数据统计。基于82口井246个单砂体1 230个数据的相关性分析结果,采用多元线性回归方法得到了浊积砂体含油性定量预测模型,并运用未参与统计分析的19口井27个解释层进行检验,预测结果与实际解释吻合率达到了70.3%。该方法在研究区浊积岩勘探决策部署中发挥了积极的指导作用,取得了良好的勘探效果。

The oil-bearing capability of turbidite in the middle of third member of Shahejie Fonnation in the sub-depression beh of Dongying Depression has great differences. It is difficult to optimize. In order to achieve efficient exploration, the lheory of hydrocarbon accumulation of lithologic reservoir and the actual needs of oilfield production are considered simultaneously. Five paramelcrs including sand body depth, sand body thickness, porosity, formation pressure coefficient and the distance from oil source fault are deemed to he closely related to the oil-bearing capability of sand body and be taken statistics. Based on the correlation analysis resulls of 1,230 data Ihal is from 246 sand bodies of 82 wells, a quantitative prediction model on oil-bearing capability of turbidite is eslablished by multivariate linear regression. Data of 27 interprelation zones from 19 wells are used to test the model. The prediction resuits of 19 zones are consistent with that of log interpretation or well testing, having a consistency of 70.3%. The approach has played a positive role in the exploration of turbidite. A good exploration resuh has been obtained.