en echelon fold meaning in English
雁形褶皱
Examples
- The basin - formed mechanism , evolution model and petroliferous geological features of compresso - shear basins in the world are analyzed , by which six aspects of the features are summarized as follows : 1 ) in the compresso - shear process , the sedimentary speed of basin is high , forming thicker coarse - grained clastic rocks which normally shape good petroleum reservoir ; 2 ) the source rocks of basin tend to coming from the organic matter - enriched rocks formed in pre - compresso - shear stages , except that in intense compresso - shear process , deep water - semi deep water source rocks are possibly developed in pre - compresso - shear stages , e4xcept that in intense compresso - shear process , deep water - semi deep water source rocks are possibly developed in frontal of deep depression ( fore deep ) of thrust belt ; 3 ) the en echelon folds ( including anticline and fault - nose structure ) are generally as good oil traps ; 4 ) the compresso - shear process is helpful to hydrocarbon accumulation ; 5 ) it may promote the maturity and hydrocarbon - generating process of organic matte , and 6 ) the thrust belts in the surrounding areas of compresso - shear basin are favorable are favorable domains for petroleum concentration
摘要通过对世界上压扭性盆地的成盆机制、演化模式和油气地质特点分析，总结压扭性盆地具有6个方面的石油地质特征：压扭作用期间盆地的沉积速率较高，一般形成较厚的粗碎屑沉积，它们常构成很好的油气储集层：盆地的烃源岩往住来自于前压扭期砂成的富含有机质的岩石，但在强烈的压扭作用期间，在冲断带的前缘深坳陷（前渊）中有可能发育深水半深水相的烃源岩；压扭（张扭）作用期间形成的雁行式褶皱（包括背斜和断鼻等）往住是很好的油气圈闭；压扭作用易于成藏；压扭作用可以促进有机质的成熟生烃作用；压扭性盆地的周边冲断带是油气赋存的有利部位。