摘要
为揭示奥里诺科重油带JN4区块Merecure组砂体展布特征,基于岩心观察、直井和水平井测井曲线、三维地震等资料,结合90°相位转换、地层切片等地震沉积学技术,分析Merecure组层序地层、沉积特征及砂体发育模式,确定不同类型沉积微相展布范围。结果表明:研究区Merecure组属于砂质辫状河沉积体系,可划分为1个长期旋回、2个中期旋回、3个短期旋回;主要发育心滩、砂质河道充填、废弃河道充填微相;经90°相位转换的三维地震资料可以得到更好的测井岩性标定,应用水平井资料能更有效刻画沉积微相。Merecure组沉积期发育辫状河道砂体,心滩砂体长轴方向近似为南西-北东向,发育规模较大,长度为800~1700 m,长宽比为2.0~2.5;砂质河道充填多呈宽条带状连片分布,宽度为200~500 m;废弃河道充填多呈孤立长条状分布,宽度为150~300 m。该结果丰富地震沉积学在辫状河沉积相研究中的应用,对研究区的沉积储层评价具有指导意义。
In order to reveal the sand body distribution characteristics of Merecure Formation in JN4 Block,based on core observation,vertical well,horizontal well log,3 Dseismic data,combined with the seismic geomorphology approach,the sequence stratigraphy and sedimentary characteristics,sand body development mode and distribution sedimentary microfacies of Merecure Formation were studied in detail.The results show that Merecure Formation belongs to sandy braided fluvial sedimentary system.The sequence stratigraphy was divided into 1 long-term cycle,2 medium-term cycles and 3 short-term cycles.The main sedimentary microfacies in the region include channel bars,sandy channel filling and abandoned channel filling.The 3 Dseismic data converted by 90°phase conversion can get better logging lithology calibration,and the horizontal well data can be used to describe sedimentary microfacies more effectively.During the sedimentation of Merecure Formation,the braided channel sand body is developed,and the long axis direction of the sand body in the central beach is approximately from southwest to northeast,with a large scale of development,with a length of 800~1700 mand length-width ratio is2.0~2.5;the filling of the sandy river channel is mainly distributed in wide strips and strips,with a width of 200~500 m;the filling width of the abandoned river channel mostly distributed in isolated strips is 150~300 m.It is proved that seismic sedimentology is a useful approach applied to guiding the evaluation of sedimentary reservoirs in the study area.
作者
杨川
林承焰
孟征
任丽华
程盼
陈仕臻
YANG Chuan;LIN Chengyan;MENG Zheng;REN Lihua;CHENG Pan;CHEN Shizhen(School of Geosciences,China University of Petroleum(East China),Qingdao,Shandong 266580,China;Key Laboratory of Shandong Province for Reservoir Geology,Qingdao,Shandong 266580,China;PetroChina Research Institute of Petroleum Ex ploration and Developrment,Beijing 100083,China)
出处
《东北石油大学学报》
CAS
北大核心
2019年第6期105-117,I0007,I0008,共15页
Journal of Northeast Petroleum University
基金
国家科技重大专项(2016ZX05031-001-003)
