CAJ | 학술논문

Oriente-Maranon盆地是古生代克拉通边缘基础上发展和形成的次安第斯山(Sub-Andeans)前陆盆地之一,经历了克拉通边缘盆地→裂谷盆地→前陆盆地3个演化阶段.盆地内主要的烃源岩及储、盖组合均发育在裂谷盆地阶段,三叠系-侏罗系Pucara群和白垩系Chonta组2套主要烃源岩的排烃高峰期分别是古新世-始新世(距今60～45 Ma)和中新世(距今15～5 Ma).Chonta组自生自储组合是最重要的成藏组合.盆地西部发育逆)中断层/褶皱圈闭和基底卷入圈闭,中部发育挤压或披覆背斜,东部发育牵引背斜圈闭,不同类型的圈闭沿北西-南东走向呈带状分布.有潜力的勘探领域包括中西部白垩系Chonta组烃源岩供油区域的披覆和挤压背斜圈闭,中部和南部侏罗系Pucara群烃源岩供油区域的牵引背斜圈闭和挤压背斜圈闭.中部的Pucara群碳酸盐岩圈闭,北部和东部成熟探区上白垩统岩性圈闭和上古生界构造一地层圈闭.图5参13
Oriente-Maranon분지시고생대극랍통변연기출상발전화형성적차안제사산(Sub-Andeans)전륙분지지일,경력료극랍통변연분지→렬곡분지→전륙분지3개연화계단.분지내주요적경원암급저、개조합균발육재렬곡분지계단,삼첩계-주라계Pucara군화백성계Chonta조2투주요경원암적배경고봉기분별시고신세-시신세(거금60～45 Ma)화중신세(거금15～5 Ma).Chonta조자생자저조합시최중요적성장조합.분지서부발육역)중단층/습추권폐화기저권입권폐,중부발육제압혹피복배사,동부발육견인배사권폐,불동류형적권폐연북서-남동주향정대상분포.유잠력적감탐영역포괄중서부백성계Chonta조경원암공유구역적피복화제압배사권폐,중부화남부주라계Pucara군경원암공유구역적견인배사권폐화제압배사권폐.중부적Pucara군탄산염암권폐,북부화동부성숙탐구상백성통암성권폐화상고생계구조일지층권폐.도5삼13
Oriente-Mamnon Basin is one of the Sub-Andean foreland basins developed and formed on the basis of Paleozoic cratonic margin.The Oriente-Maranon Basin went through three evolution phases:marginal basin of craton,rift basin and foreland basin.The phase of rift basin formed the primary source rocks and reservoir and seal.Triassic-Jurassic Pueara Group and Cretaceous Chonta Formation generated a mass of hydrocarbons in Paleoeene-Eocene(60-45Ma)and Miocene(15-5Ma),respectively.The assemblage of self-generating and self-preserving reservoir was the most important type in the Cretaceous Chonta Formation.There are basement-involved thfust traps and detached thrust faulted/folded traps in western basin,drape and extruding anticline traps in central basin,and traction anticline traps in eastern basin.The different types of traps are distributed along the NW-SE direction.Four potential exploration targets are:Drape and extruding anticline traps in the source rock drainage area in Chonta Formation in central-western basin;Traction and extruding anticline traps in the source rock drainage area in Pueara Group in central-southern basim Pucara Group carbonate traps in central basin;Upper Cretaceous lithologic traps and Upper Paleomic structural-stratigraphy traps in the northern and eastern exploratory area.