油层分类
Oil layer classification
oil bearing layer classification
油气层类型
oil and gas reservoir types
油气分类
hydrocarbon classification
分层分类
hierarchical classification
layered classification
hierachical classification
hiberarchy classification
分层分类法
Hierarchical classification method
分层分类管理
management with divide-layer and sort
信息分层分类
information classification
保护油气层
oil and gas zone protection
reservoir protec-tion
reservoir pro-tection
Formation protection
薄互层油气藏
thin-interbedded reservoir
采油油轮油气分离装置
offshore oil tanker oil-gas separator
超低侵害油气层保护剂
Ultra-low permeability reservoir protection agent
成层油层
stratification of methane
稠油分类
viscous oil classification