鄂尔多斯盆地古隆起东侧奥陶系古地貌预测  

Research on seismic prediction method of tight oil reservoirs in Longdong area

作　　者：蔡克汉[1,2] 高改[1,2] 许磊明 

机构地区：[1]中国石油长庆油田分公司勘探开发研究院 [2]低渗透油气田勘探开发国家工程实验室

出　　处：《低渗透油气田》2014年第2期37-42,48,共7页

基　　金：中国石油天然气集团公司物探攻关项目“鄂尔多斯盆地苏203井区奥陶系中组合白云岩储层地震预测（2012-02-03）”研究成果.

摘　　要：鄂尔多斯盆地古隆起东侧奥陶系马家沟组马五5气藏是一个与古岩溶或不整合面有关的大型古地貌一岩性气藏．前石炭纪古地貌特征严格控制了储层的分布和天然气的运移和聚集。因此，古地貌的刻画是古隆起东侧奥陶系中组合储层描述的关键。从区域地质背景入手，结合地质、测井、地震，通过模型正演、地震属性分析等技术，得到了本溪组地层厚度与地震反射振幅的关系，解释得到奥陶系顶部侵蚀面，提高了地震层位与地质分层的匹配质量，精细刻画了古地貌的形态。Zhang, iiatan shale is widely developed in the Chang-7 oil reserwfir group in the, E. （,ansu （lxmgdung） area at the deposition stage. And the gravily-flow sand-body deposition is also develuped in the group. They provide broad reservoir space fur tight oil. Compared with conventional reservoirs, tight Chang-7 rescrwfirs have weak seismie responses, large vcrtieal and Ilurizuntal variations, and diffieult forecast of ＂sweet pot＂ areas. Through the pctrophysieal method and analysis of seismic forward modeling, general principles of seismic responses caused by physical properties and thickness variations of the reservoirs are explored. On this basis, the reservoir sand-burly is predicted by adopting seismic facies analysis and frequen- cy division imaging. The reservoir＇s oil-bcaringness is predicted by using absorption attenuation, pre-stack highlight-body and pre-staek Puisson＇s ratio inversion with goud results

关 键 词：侵蚀面 古地貌 模型正演 地震振幅属性 本溪组厚度 

分 类 号：P618.130.2[天文地球—矿床学]