【摘要】 通过对晚白垩世松辽盆地南部西部斜坡区的综合研究,从基底构造、古地理位置、地层产状和厚度、钻井和地震资料特征及构造发育情况等方面表明,该区在青山口组-嫩江组坳陷期发育侵蚀坡折带、沉积坡折带和构造坡折带。由于多种类型坡折带的存在,制约着盆地充填可容空间的变化,控制了区内的层序发育、沉积体系展布和非构造圈闭类型。松辽盆地南部西部斜坡区湖盆坡折带附近是非构造油气藏发育的有利部位,可以应用坡折带理论指导本区的隐蔽油气藏勘探。更多还原

【Abstract】 The study is carried out by a comprehensive analysis of the basement structure, palaeo-(geographic) location, occurrence and thickness of stratigraphy, structure development and of the well log and seismic data of the western slope of the southern sector of the Songliao basin in the late Cretaceous period. Three types of slope breaks developed during the depression period from the Qingshankou to Nenjiang Formations based on the present research: erodent, sedimentary and structural. It is evident these different types of slope breaks not only have restricted changes of compatible space filling in basin, but also have an important control on the sequence, development of sedimentary system and types of non-structural traps. Consequently it is obvious that the western slope of the Southern sector of the Songliao basin is a favorable area for non-structural traps and subtle reservoir exploration. The theory of slope breaks is also important in directing the further exploration and reserves prediction.更多还原