琼东南盆地异常地层压力与深部储集层物性

以琼东南盆地的实际资料为基础,分析了琼东南盆地异常地层压力分布及其成因机制,查明了琼东南盆地深部储层异常物性分布特征和异常地层压力对深部储层物性的影响并提出了深部储层的预测方法.认为琼东南盆地体现了晚期超压的特点,次生孔隙发育段与异常超压发育段对应,异常压力通过烃类的次生孔隙生成和原生孔隙保护、欠压实的孔隙保护以及阻止胶结物的形成3种方式对深部储层孔隙保存和发育产生影响.最后验证了Gluyas和Cade提出的有效埋藏深度是计算和预测超压条件下储集层孔隙度与深度关系的方法,认为该方法对琼东南盆地深部超压条件下储集层孔隙度的预测是-种行之有效的方法.

Abnormal Formation Pressure and Deep Reservoir Physical Property in Qiongdongnan Basin

Based on practical data from Qiongdongnan Basin, the distribution and genetic mechanism of abnormal formation pressure in the basin are analyzed, the distributional characteristics of deep reservoir physical properties and the effect of the abnormal formation pressure on the deep reservoir physical properties are clarified, a method for deep reservoir prediction is proposed. It is considered that the late overpressure is presented in Qiongdongnan Basin, the zone of secondary pore growth is corresponding to that of abnormal overpressure. The abnormal pressure is generated through a secondary pore of hydrocarbon and protected by original pores and under compaction pores, which influences the preservation and development of deep reservoir pores. The method for establishing the relation between reservoir porosity and its depth with effectively buried depth under overpressure condition, which is proposed by Gluyas and Cade, is demonstrated and it is considered that the method is effective for predicting reservoir porosity under deep overpressure condition in Qiongdongnan Basin.