利用地震属性分析沉积环境的误区:以辽河盆地滩海东部凹陷东二段为例  

Pitfall in sedimentary interpretation using seismic attributes:An example from Dong2 member in East Depression,offshore area of Liaohe Basin

作　　者：杨懿[1] 姜在兴[2] 魏小洁[2] 陈冬[3] 朱克[4] 徐杰[2] 

机构地区：[1]西安石油大学石油工程学院,陕西西安710065 [2]中国地质大学(北京)能源学院,北京100083 [3]中国石油化工股份有限公司石油勘探开发研究院,北京100083 [4]中国石油化工股份有限公司石油物探技术研究院,江苏南京210014

出　　处：《地学前缘》2012年第1期221-227,共7页Earth Science Frontiers

基　　金：国家科技重大专项项目(2008ZX05009-002)

摘　　要：为了解辽河盆地滩海地区东二段沉积相类型,通过现代河流沉积调研以及岩心、测井、地震相综合分析,结果证明:滩海地区东二段沉积相类型主要以滨浅湖-滩坝相为主,而非地震属性图所反映的河流相沉积,地震属性解释存在误区。古沉积环境解释最重要的因素就是如何理解"保存"的概念。河流在自身演化过程中迁移、改道时常发生,在漫长的地质时间内,难以保存一个完整的河道。沉积环境分析中,应当遵循从岩心相—测井相—地震相的分析过程,而不是单纯依据地震属性直接进行沉积相研究。To better understand sedimentary types in the Dong2member of offshore in the Liaohe Basin,through the research of modern river deposition and comprehensive analyses of cores,well logs,and seismic profiles,it was proved that the dominant facies in Dong2member is characterized by shore shallow lacustrine-beach-bar facies,instead of the fluvial facies deduced by seismic attributes slices.The key factor in interpreting ancient depositional environment is the concept of＂preservation＂.Migration and divagation often happened during the river evolution,so it is hard to preserve a complete river channel.Analyses of the sedimentary environments should follow the study order of core facies-logging facies-seismic facies,but not only based on seismic attributes.

关 键 词：地震属性 东二段 河道沉积 湖泊-滩坝沉积 辽河滩海 

分 类 号：TE121.32[石油与天然气工程—油气勘探]