The main trap is subtle composite trap of structure and lithology.
圈闭类型主要发育构造-岩性复合型隐蔽圈闭。
There were various trap types developed in the Middle Upper Ordovician, including sedimentary type, reef type and structure controlled sedimentary type.
中上奥陶统圈闭发育多种类型，有成岩型圈闭、礁型圈闭和受构造作用控制的成岩型圈闭。
The process of the evaluation for trap structure is, in essence, a multielement analysis, a mullidecision as well as a fuzzy processing.
圈闭构造的评价过程实质是多元分析与多元决策加上模糊处理的问题。
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