水淹层解释单元自动划分方法

The automatic division method of the interpretation unit for water-flooded zones

本文针对目前水淹层定性解释中存在的技术难题,提出了沉积单元是控制河道砂体水淹级别分布的主要因素,认为不同沉积单元之间的水淹规律彼此独立,同一沉积单元内部水淹规律高度相关,而正确划分沉积单元是水淹层定性解释的关键.将地质上的沉积单元映射到测井曲线上,提出了解释单元的基本概念,利用稳定的泥岩隔层作为不同解释单元的分界标志,给出了利用电阻率曲线自动划分解释单元的方法与步骤.2口密闭取心井处理结果表明:该套方法可以有效地划分解释单元,与人工解释结果对比,符合率达到96.3%.

Facing on the technological difficulty in the qualitative interpretation of water flooded zones in present, this paper represents that the sedimentary unit is a primary factor to control the level of water-flooded in the channel sand. The water-flooded regularity is independent each other among the different sedimentary units but correlative highly in a same sedimentary unit. Therefore it is a key to dividing properly sedimentary unit for qualitative interpretation in water-flooded zones. The concept of interpretation unit is represented by mapping sedimentary unit in geology into the well-logging curve and the stable mudstone barrier bed is adopted as the separable symbol for different interpretation units so that the method and process of automatic division are obtained by using the resistivity curve. The processing result of two sealed core wells show that this method can divided accurately the interpretation unit and the in＊erpretation coincidental rate is up to 96.3 % with the result interpreted by man.