海拉尔盆地呼和湖凹陷白垩系地震相  

Seismic facies of the Cretaceous in the Huhehu Depression,Hailar Basin

作　　者：陈学海[1] 卢双舫[1] 薛海涛[1] 李军辉[2] 刘秋宏[3] 胡寿梅[1] 黄文彪[1] 

机构地区：[1]东北石油大学地球科学学院 [2]大庆油田有限责任公司勘探开发研究院 [3]大庆油田有限责任公司海拉尔石油勘探开发指挥部

出　　处：《石油勘探与开发》2011年第3期321-327,335,共8页Petroleum Exploration and Development

基　　金：国家重点基础研究发展规划(973)项目(2009CB219306);教育部新世纪优秀人才支持计划(NCET-04-0345)

摘　　要：海拉尔盆地呼和湖凹陷是大庆油田寻找后备储量的新领域,但由于研究程度较低,至今未取得重大突破。依据地震反射终止关系,结合区域地质背景,将呼和湖凹陷白垩系划分成8个地震层序,即Sq1—Sq8。利用地震反射内部结构和外部几何形态,结合地震反射同相轴的振幅和连续性等参数,在研究区目的层(Sq1—Sq5)内识别出平行席状、亚平行席状、前积、充填、楔状、丘状、杂乱及波状-乱岗状地震相共8种地震相,并对其特征进行了描述。各种地震相平面分布具有差异性、纵向上具有继承性和演化性。经过综合解释,建立地震相与单井沉积相之间的响应关系,把地震相转换为沉积相。以湖泊沉积理论为指导,建立目的层各层序地震相-沉积相模式,结果表明,目的层主要发育冲积扇、扇三角洲、辫状河三角洲、湖泊以及湖底扇等沉积体系。The petroleum exploration in the Huhehu Depression of Hailar Basin has become a new area for searching for reserves in the Daqing Oilfield,but no great breakthrough has been made owing to the lower study degree.According to the seismic reflection termination relationship and the regional geological background,the Cretaceous in the Huhehu Depression can be divided into eight seismic sequences,Sq1—Sq8.According to the internal reflection texture and external geometric configuration and in combination with the parameters of amplitude and continuity,eight seismic facies are identified in the target sequences of the study area,including parallel sheet,sub-parallel sheet,prograding,filling,wedge shaped,moundy,chaotic and wave-hummocky seismic facies.And their characteristics are described in detail.These seismic facies show differentiation in horizontal distribution and are successive and evolutionary vertically.Seismic facies are transformed into sedimentary facies through a comprehensive interpretation.The seismic-sedimentary facies model of each sequence is established according to the lacustrine sedimentary theory.The results show that the target sequences develop the sedimentary systems of alluvial fan,fan delta,braided river delta,lake and sublacustrine fan.

关 键 词：地震层序 地震相 沉积相 呼和湖凹陷 海拉尔盆地 

分 类 号：TE121.1[石油与天然气工程—油气勘探]