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

作　　者：王俊[1] 赵家宏[2] 腾军 王天煦 鲍志东[1] 张红静 袁淑琴 林艳波 高银山 WANG Jun;ZHAO JiaHong;TENG Jun;WANG TianXu;BAO ZhiDong;ZHANG HongJing;YUAN ShuQin;LIN YanBo;GAO YinShan(College of Geoscience,China University of Petroleum（Beijing）,Beijing 102249,China;Research institute of Exploration ＆ Development,Jilin Oilfield Company,PetroChina,Songyuan,Jilin 138000,China;Geophysical Technology Research Center,BGP Inc.Of CNPC,Zhuozhou,Hebei 072751,China;Research institute of Exploration ＆ Development,Dagang Oilfield Company,PetroChina,Tianjin 300280,China;Oil Recovery Plant No.5,Changqing Oilfield Company,PetroChina,Xi＇an 710200,China)

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249 [2]中国石油吉林油田分公司勘探开发研究院,吉林松原138000 [3]东方地球物理公司物探技术研究中心,河北涿州072751 [4]中国石油大港油田分公司勘探开发研究院,天津3002805 [5]中国石油长庆油田分公司第五采油厂,西安710200

出　　处：《沉积学报》2018年第3期570-583,共14页Acta Sedimentologica Sinica

基　　金：国家重大科技专项课题(2011ZX05004-004-007)~~

摘　　要：浅水三角洲前缘砂体是松辽盆地主要勘探开发目标之一,由于该类储层砂泥岩薄互层十分发育,一直以来都是储层预测中的难点。利用覆盖全区的三维地震资料和已有钻井、测井信息,在建立研究区青三段高分辨率层序地层格架的基础之上,运用"相位调整—地震相—地层切片"的地震沉积学综合研究方法,对松辽盆地南部乾安地区上白垩统青山口组三段的砂体类型、特征及层序格架内砂体演化规律作了进一步探讨。研究表明,青三段可划分为2个三级层序,三级层序内进一步划分为12个四级层序;地震资料进行相位调整后,将地震同相轴与岩相建立相互对应关系,红色波峰代表偏砂相,黑色波谷代表偏泥相;在四级层序约束下提取典型地层切片,并识别出枝状水下分流河道、曲流状水下分流河道和末端水下分流河道3类主要砂体,各类砂体具有不同的地震相特征;SQ1三级层序早期以发育末端水下分流河道为主,晚期以发育枝状水下分流河道和曲流状水下分流河道为主。SQ2三级层序湖侵体系域早期以发育枝状水下分流河道为主,晚期以发育末端水下分流河道为主。SQ2三级层序湖退体系域以发育枝状水下分流河道和曲流状水下分流河道为主。The shallow water delta-front sand bodies are one of the major exploration and development targets in theSongliao Basin, and the prediction of these sand bodies is difficult due to its characteristics of thin intersection ofsandstone and mudstone. Integrated with the full-covered 3D seismic data, drilling and logging data, the framework ofhigh-resolution sequence stratigraphy of the Member 3 of Qingshankou Formation in the study area is established, andthen with the integrated research method of seismic sedimentology, ＂ phase adjustment-seismic facies-strata slice＂ , thetype 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 K2qn3can be divided into two 3rd-order sequences and twelve 4th-ordersequences. The correlationship between seismic events and lithofacies has been established after the phase adjustmentof seismic data, the red wave crest refers to partial sandstone lithofacies, and the black wave trough refers to partialmudstone lithofacies. From the typical strata slice extracted under the restriction of 4th-order sequence, three maintypes of sand bodies have been recognized, including the branch type of subaqueous distributary channel, meanderingtype of subaqueous distributary channel and terminal type of subaqueous distributary channel, of which each type hasown 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 tractof the SQ2, sand bodies in the study area were mainly branch type whereas mainly terminal type in the late stage. Inthe 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 

分 类 号：P631[天文地球—地质矿产勘探]