Paleogene lowstand system tract deposits and nonstructural traps in dongying sag 东营凹陷下第三系低位域沉积及非构造圈闭
2.
Lithologic stratigraphic reservoirs are still the major exploration emphasis in subtle reservoirs which is a general expression of all the nonstructural traps and includes some structural reservoirs that are difficult to find nowadays 岩性地层油气藏在目前仍是隐蔽油气藏勘探的主体，而隐蔽油气藏是各类以非构造为主的圈闭类型的一种通俗表达，也包含某些目前识别和评价难度较大的构造油气藏。
