沉积学报2018，Vol.36Issue(3)：570-583,14.DOI:10.14027/j.issn.1000-0550.2018.082
浅水三角洲前缘砂体地震沉积学研究——以松南乾安地区上白垩统青三段为例
Seismic Sedimentology Research on Shallow Water Delta Front Sandbodies:A case study on Member 3 of upper Cretaceous Qingshankou Formation in Qian' an area, south Songliao Basin, NE China
摘要
Abstract
The shallow water delta-front sand bodies are one of the major exploration and development targets in the Songliao Basin, and the prediction of these sand bodies is difficult due to its characteristics of thin intersection of sandstone and mudstone. Integrated with the full-covered 3D seismic data, drilling and logging data, the framework of high-resolution sequence stratigraphy of the Member 3 of Qingshankou Formation in the study area is established, and then with the integrated research method of seismic sedimentology,"phase adjustment-seismic facies-strata slice", the type and character of the sand bodies and their evolution discipline in the frame of high resolution sequence stratigra-phy is discussed. The results shows that the K2 qn3 can be divided into two 3rd-order sequences and twelve 4th-order sequences. The correlationship between seismic events and lithofacies has been established after the phase adjustment of seismic data, the red wave crest refers to partial sandstone lithofacies, and the black wave trough refers to partial mudstone lithofacies. From the typical strata slice extracted under the restriction of 4th-order sequence, three main types of sand bodies have been recognized, including the branch type of subaqueous distributary channel, meandering type of subaqueous distributary channel and terminal type of subaqueous distributary channel, of which each type has own characters of unique seismic facies. In the early stage of SQ1, there were mainly terminal type of subaqueous dis-tributary channel sand bodies in the study area. In the late stage of SQ1, there were mainly branch type and meander-ing type of subaqueous distributary channel sand bodies. However, in the early stage of lake transgressive system tract of the SQ2, sand bodies in the study area were mainly branch type whereas mainly terminal type in the late stage. In the lake regressive system tract of the SQ2, there were mainly branch type and meandering type of subaqueous distrib-utary channel sand bodies in the study area.关键词
水下分流河道/地震沉积学/青山口组/乾安地区/松辽盆地Key words
subaqueous distributary channel/seismic sedimentology/qingshankou Formation/Qian' an area/Songli-ao Basin分类
天文与地球科学引用本文复制引用
王俊,赵家宏,腾军,王天煦,鲍志东,张红静,袁淑琴,林艳波,高银山..浅水三角洲前缘砂体地震沉积学研究——以松南乾安地区上白垩统青三段为例[J].沉积学报,2018,36(3):570-583,14.基金项目
国家重大科技专项课题(2011ZX05004-004-007)National Science and Technology Major Project, No.2011ZX05004-004-007 （2011ZX05004-004-007）
