三角洲前缘相储层时间单元对比方法和技术

地层单元的划分标准已由原来的大体分层向小层沉积时间单元转变,针对密井网开发区前缘相储层标志层多、层多且薄和河道下切等特点,采用"标准层控制下,平面逐级闭合、剖面逐层逼近"对比方法和5项关键技术,即全区标准层控层系对比技术,局部参照层对比研究技术,岩性特征组合系列对比,平面逐级闭合对比以及标志层逼近控制对比技术,建立了研究区前缘相储层统层对比路线,完成了各小层精细划分与对比。该方法解决了前缘相时间单元划分与对比的难题。

Comparison method and techniques for front facies reservoir time unit

Given the change of the classification criteria of stratum units from the general hierarchical to the deposition time unit of small layer, this paper is aimed at addressing many marker layers, many thin layers and channel incision, as in the case of the front facies reservoir of the dense well pattern development zone and introduces the contrast route of the front facies reservoir of the study area and the fine division and correlation of small layers. These are accomplished by adopting the comparative methods consisting of ＂standard layer control, the progressive closure of the plane and layer by layer approxima- tion of the section＂ and other key technologies comprising ＂regional standard layer control, local reference layer control, lithotogic features combination series, the progressive closure of the plane and marker layer approximation control＂. The method features a solution to the time unit division and correlation in the front facies.