根据丰富的地质资料和笔者的实践经验，对茂名盆地强风化、中风化砂岩层的划分和特征定性地进行了界定和阐述。
The division and characteristics of the highly and intermediary weathered sandstone in Maoming basin will be described qualitatively based on the abundant geological data and the author's experience.
它不受井壁和用围岩层的影响，可准确地划分出咸淡水分界面。
It is not affected by the well-wall and surrounding strata and may differentiate accurately between seawater and fresh water.
此发现对研究海相岩层风暴沉积及其地层划分与对比具有十分重要的意义。
This discovery is very important for study of the storm deposits of the Marine and the division and correlations of the strata.
实践证明：瞬变电磁勘探在勘探基岩及划分岩层方面效果较好。
The practice proved that transient electromagnetic exploration has good effect in exploring bedrock and differentiating rock strata.
以《国际地层指南》的多重地层划分观点为基础，建立了一套完整的义县组岩石岩层单位。
According to the multiple stratigraphic division of the International stratigraphic Guide, a complete column of lithostratigraphic units of the Yixian Formation has been erected.
然而按照经典模式划分的碳酸盐岩层序，在生产中与目标优选及开发方式结合并不紧密，进而影响了实际生产。
However, the previous sequence stratigraphic division of the Lower Paleozoic carbonates is not suitable for target selection and development strategy optimization, influencing production.
构造岩层是其中主要类别，其单位等级体制可划分为岩群、岩组与岩段。
And the main kind of them is the structural bed, which consists of litho group, litho formation and litho member in the classification system.
构造岩层是其中主要类别，其单位等级体制可划分为岩群、岩组与岩段。
And the main kind of them is the structural bed, which consists of litho group, litho formation and litho member in the classification system.
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