通南巴构造须四段致密砂岩优质储层预测

摘要：针对川东通南巴构造须家河组四段储层较致密的特点，采用地球物理反演、地震属性分析、含气储层地震响应分析等多种方法相结合的研究思路，首先进行砂体预测，在明确砂体分布特征的基础上开展孔隙度预测，寻找砂体中孔隙度相对高的部分，同时在含气储层地球物理响应模式研究的基础上进行含气储层预测，最后预测了须四段优质储层的平面分布。该方法充分利用各种地质与地球物理信息，从砂体预测 → 高孔隙度砂体预测 → 含油气砂体预测，多种储层预测方法相结合逐步深入地寻找优质储层，指出有利勘探目标区，可以为致密碎屑岩油气藏勘探提供有充分地质依据的、行之有效的方案。

High-quality Reservoir Prediction on the Tight Sandstone in Fourth Member of Xujiahe Formation in the Tongnanba Structure

Reservoir of the fourth member of Xujiahe Formation of Tongnanba structure is more dense in east Sichuan.Combining methods of such as geophysical inversion,seismic attribute analysis,gas-bearing reservoir seismic response analysis,we make sand body prediction first.Then,on the basis of knowing the distribution of sand body clearly,we make porosity prediction,looking for parts of relatively high porosity of sand body.At the same time,we predict gas-bearing reservoir on the basis of studying geophysical response model of gas-bearing reservoir,and finally,we make predictions about plane distribution of high-quality reservoir of the fourth member of Xujiahe Formation.This method,making use of various geological and geophysical information,and combining many methods of reservoir prediction,from sand body prediction and high porosity sand body prediction to petroleum sand body prediction,works well in looking for high-quality reservoir and pointing out favorable target area of exploration,and thus provides effective scheme for tight clastic rock reservoir exploration.