Seismic sedimentary facies study based on high-resolution sequence framework: A case study on sequence Sqd2 in Liaozhong Depression
Wu Wei1, Lin Changsong2, Zhou Xinhuai3, Lai Weicheng3, Wang Jun3
1. Institute of Resources & Environment,Henan Polytechnic University,Jiaozuo,Henan 454003,China;
2. School of Ocean Sciences,China University of Geosciences(Beijing),Beijing 100083,China;
3. Tianjin Branch Company,China National Offshore Oil Corp.,Tanggu,Tianjin 300452,China
Abstract：Regarding the Dongying clastic formation of Liaozhong Depression,high-resolution sequence and seismic sedimentary studies were utilized to describe sedimentary facies in order to disclose the distribution and controlling factors of the sedimentary system.The study results show that the strata of Dongying formation in Liaozhong Depression could be divided into three third-order sequences(Sqd1,Sqd2 and Sqd3).Two four-order sequences in the sequence Sqd2 could be identified by tracing a set of regressive boundaries.Based on seismic interpretation combined with logging characteristics,the seismic facies of delta,braided delta,turbidite fan were identified.Turbidite fan accompanying delta was rich in mud,while accompanying lacustrine turbidite fan was rich in sand.The boundary of sedimentary deposit could be identified by extracting seismic attribute.Distribution of sedimentary facies of fourth-order sequences could also be dominated by water system,ancient landform,relative lake level change and palaeoclimate.
吴伟, 林畅松, 周心怀, 赖维成, 王军. 辽中凹陷高精度层序地层格架划分与沉积相研究[J]. 石油地球物理勘探, 2012, 47(1): 133-141.
Wu Wei, Lin Changsong, Zhou Xinhuai, Lai Weicheng, Wang Jun. Seismic sedimentary facies study based on high-resolution sequence framework: A case study on sequence Sqd2 in Liaozhong Depression. OGP, 2012, 47(1): 133-141.
