CAJ | 학술논문

Maranon、Ucayali 和 Madre de Dios 盆地是3个弧后前陆盆地，对比研究发现：（1）古近纪和新近纪的构造运动对Ucayali 盆地的影响比 Maranon 盆地要大。Maranon 盆地西边界的古生代地层被大断层裂开，除了在老构造上有低幅度褶皱外并未明显被反转或压缩；而在 Ucayali 盆地内，则发育基底相关的逆冲褶皱和反转构造。（2）三叠纪期间，Maranon和 Ucayali 盆地的大部分地区，大的断裂和构造抬升交替保存和剥蚀着原古生代的地层，而在 Madre de Dios 盆地，很少有断层产生或抬升剥蚀，导致 Madre de Dios 盆地古生代地层比 Maranon 和 Ucayali 盆地保存较好。（3）自北向南3个盆地的主力烃源岩和主力储层的地层年代越来越老。盆地的前渊带，储层埋藏深度大和成岩作用强的特点导致储层的物性明显变差。（4）晚白垩世以来的挤压和冲断运动在3个盆地的中西部形成了大量中-高幅度的背斜、断背斜等构造圈闭。盆地东部的地层向克拉通地台方向逐层超覆，发育地层圈闭。Maranon 和 Ucayali 盆地北部，新近纪的构造挤压运动影响到基底，使断层贯穿至盆地基底，发育与基底相关的断层，而在 Ucayali 盆地的最南部发育薄皮式断层。最后，指出了3个盆地下一步勘探的领域和方向。
Maranon、Ucayali 화 Madre de Dios 분지시3개호후전륙분지，대비연구발현：（1）고근기화신근기적구조운동대Ucayali 분지적영향비 Maranon 분지요대。Maranon 분지서변계적고생대지층피대단층렬개，제료재로구조상유저폭도습추외병미명현피반전혹압축；이재 Ucayali 분지내，칙발육기저상관적역충습추화반전구조。（2）삼첩기기간，Maranon화 Ucayali 분지적대부분지구，대적단렬화구조태승교체보존화박식착원고생대적지층，이재 Madre de Dios 분지，흔소유단층산생혹태승박식，도치 Madre de Dios 분지고생대지층비 Maranon 화 Ucayali 분지보존교호。（3）자북향남3개분지적주력경원암화주력저층적지층년대월래월로。분지적전연대，저층매장심도대화성암작용강적특점도치저층적물성명현변차。（4）만백성세이래적제압화충단운동재3개분지적중서부형성료대량중-고폭도적배사、단배사등구조권폐。분지동부적지층향극랍통지태방향축층초복，발육지층권폐。Maranon 화 Ucayali 분지북부，신근기적구조제압운동영향도기저，사단층관천지분지기저，발육여기저상관적단층，이재 Ucayali 분지적최남부발육박피식단층。최후，지출료3개분지하일보감탐적영역화방향。
Maranon,Ucayali and Madre de Dios basins are Sub-Andean foreland basins.The key results of study show that:(1)The tectonic events at the end of Tertiary formed the basement-involved thrusts and reverse structures in Ucayali basin,while the effects on Maranon basin are less intensive.(2)During the Triassic peri-od,most Paleozoic formations in Maranon and Ucayali basins are uplifted and eroded,while in Madre de Dios basin,Paleozoic formations are unaffected and relatively well preserved.(3)Generally,the main source rocks and reservoirs for the three basins become older from north to south.And the reservoir quality of foredeep region are relatively poor due to deep burying and diagenesis.(4)Anticlinal and faulted-anticlinal traps are formed in the western and middle parts of the foreland basins because of compressive tectonic events,while stratigraphic traps developed in the east of the basin.Basement-involved thrusts predominated in the Maranon basin and the northern part of Ucayali basin,which were caused by the Tertiary compression and uplift,while thin-skinned thrusting are characterized in the southern part of Ucayali basin.Finally,the exploration targets are pointed out with the comparison results of the three basins.Three exploration targets exist in Maranon basin,including thrustfold-foredeep belt,carbonate reservoir in Pucara Formation as well as Cretaceous reservoir without the background of hydrocarbon accumulation in Paleozoic,and reservoir below Chonta Formation.Four types of ex-ploration leads exist in Ucayali basin:traps in thrustfold-foredeep belt,Carbonate reservoir in Pucara Forma-tion,as well as gas prospects of Permian formation in North Ucayali sub-basin,and Cretaceous stratigraphic traps in the eastern part of the basin.And structures with inherited Paleozoic uplift in the foreland slope are main exploration targets in Madre de Dios basin.