塔河油田石炭系储层油气预测方法

A method for prediction of oil and gas in Carboniferous reservoir,Tahe Oilfield.

塔河油田石炭系储层总体上为一套浅海—滨海相碎屑岩沉积层系 ,储层段具有砂泥岩交互 ,上部含油、下部含水的纵向分布特征 ,即以致密层段为封隔 ,纵向上发育多个油、气、水小系统。依据这一重要地质特征 ,结合地震勘探的某些新技术和新手段 ,提出了一套针对性较强的储层油气预测方法。在储层精细标定基础上 ,进行多井约束地震反演和孔隙率约束反演 ,刻画储层的空间展布特征 ,表征储层内部物性变化 ,预测有利储层分布范围 ;通过三维地震相分析、三维相干体、非线性油气预测和吸收系数油气预测等方法 ,在有利的储层分布区内 。

The Carboniferous reservoir in Tahe Oilfield is generally a set of depositional formation of shallow marine shore clastic rock, which has the feature of vertical distribution with sand shale interbedded, sealed by compacted interval,upper for oil and lower for water. There are many sub systems of oil gas water to be vertically developed. Based on the important geologic feature and combining new technology and new methods in seismic exploration, the method for prediction of oil and gas reservoir that has definite object has been built. On the basis of fine labeling the reservoir, we carry out multi well constrained seismic inversion and porosity constrained inversion, depict spatially distributing feature of reservoir, show physical changes inside the reservoir and predict distributing scope of prospective reservoir. By use of the methods such as analysis of 3 D coherent cube, non linear oil and gas prediction and oil and gas prediction by absorption ratio etc., we distinguish the rich and high productive oil and gas area in a distributing scope of prospective reservoir.