摘要
通过岩心观察、地震解释、储层反演、原油地化分析、油源对比、油气运移示踪分析等对南美洲Oriente盆地斜坡带W区块典型构造-岩性复合油藏的成藏规律进行了分析,并指出了下一步的有利勘探方向。研究结果表明:①Oriente盆地斜坡带W区块构造-岩性复合油藏整体为西倾和西南倾单斜构造,局部发育鼻隆,油藏目的层为白垩系Napo组M1ss段,砂体呈北西—南东向,储层厚度大、物性好。②研究区河口湾砂坝控制有利储层分布,W区块平稳的西倾和西南倾单斜鼻隆构造背景与NW—SE走向的泥岩条带配合控制圈闭形成,有效油气运移通道的空间展布控制成藏。③构造-岩性油藏为三阶段成藏模式,早期常规原油充注,中期原油遭受降解,晚期常规原油混合降稠。④W区块南部地区2个泥岩条带的西南部位是W区块构造-岩性复合圈闭的有利发育区。
Through core observation,seismic interpretation,reservoir inversion,crude oil geochemical analysis,oil-source correlation,and oil and gas migration tracing analysis,the accumulation rules of typical structurallithologic composite reservoirs in block W of the slope zone of Oriente Basin in South America were analyzed,and the further favorable exploration directions were pointed out.The results show that:(1)the structural lithologic composite reservoirs in block W of the slope zone of Oriente Basin are generally characterized by westsouthwest dipping monoclinic structures,with local nose uplifts.The target layer of the oil reservoirs is M1ss member of Cretaceous Napo Formation.The sand bodies are NW-SE trending,with a large reservoir thickness and good physical properties.(2)Reservoir distribution is controlled by the sandbars in estuaries,the NW-SE extends shale belt and stable west-southwest dipping nose uplifts background joint control the trap formation and the spatial distribution of effective oil migration pathway controls reservoir formation.(3)There are three stages for structural-lithologic reservoir formation,including the early conventional crude oil filling stage,the middle stage for crude oil degradation,and late stage of conventional crude oil mixing.(4)The southwest part of the two shale belts in southern area of blockWis favorable for structural-lithologic traps.
作者
马文杰
王景春
田作基
马中振
万学鹏
林金逞
许翔麟
周玉冰
MAWenjie;WAGN Jingchun;TIAN Zuoji;MAZhongzhen;WAN Xuepeng;LIN Jincheng;XU Xianglin;ZHOU Yubing(Andes Petroleum Company Limited,Quito 999165,Ecuador;China National Oil and Gas Exploration and Development Corporation,Beijing 100034,China;PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China)
出处
《岩性油气藏》
CAS
CSCD
北大核心
2023年第6期29-36,共8页
Lithologic Reservoirs
基金
中国石油天然气股份有限公司科学研究与技术开发项目“海外前陆盆地勘探评价技术研究”(编号:2021DJ3105)
中油国际海外科技项目“美洲重点地区油气成藏规律研究及潜力评价”(编号:2023-YF-01-05)联合资助。
