利用三维地震资料识别长垣油田曲流河废弃河道  

Identification of meandering river abandoned channels in Changyuan Oilfield on 3D seismic data

作　　者：卢勉[1] 姜岩[1] 李操[1] 吴高平 蔡东梅[1] 张秀丽[1] 

机构地区：[1]中国石油大庆油田勘探开发研究院,黑龙江大庆163712 [2]中国石油大庆油田采油九厂,黑龙江大庆163853

出　　处：《石油地球物理勘探》2017年第6期1290-1297,共8页Oil Geophysical Prospecting

基　　金：国家重大科技专项(2011ZX05010-001;2016ZX05054)资助

摘　　要：以长垣油田密井网区葡萄花油层葡Ⅰ2小层为例,利用三维地震资料的横向高密度信息、井资料纵向分辨率高的特点,结合浩特陶海海拉尔河段现代沉积等资料,剖析废弃河道在平面和剖面上的响应特征,形成了"地震趋势引导,井点微相控制"的井震结合废弃河道精细识别方法。按照废弃河道成因机理,结合卫星照片、现代露头、三维地震及测井等资料,将废弃河道划分为2大类4小类测井、地震响应特征,完成了长垣油田密井网区块葡Ⅰ2小层曲流河沉积环境废弃河道精细识别和平面组合,并利用抽稀井网的方法进行了验证。结果表明:井震结合相图对废弃河道的识别精度提高了11%;废弃河道走向及组合方式控制着曲流河点坝砂体的几何形态、分布规律和储层的分布特征,影响剩余油分布;研究区废弃河道以决口改道型为主,平面上呈"S"形,其中一条废弃河道横跨整个工区,长度达4.8km,宽度约为60~130m。应用废弃河道识别成果指导开发调整挖潜,取得了较好应用效果。The Bed PⅠ2 of Putaohua Reservoir is located in the dense-well pattern block of Changyuan Oilfield.Based on laterally high-density 3 Dseismic data and vertical high-resolution well logging data,we analyze seismic response characteristics of the abandoned channels on plans and sections with deposition information in the Hailar belt in Haotetaohai.Our abandoned channel identification approach is"directed by seismic characteristics and controlled by single-well facies "based on well logging and seismic data integration.According to mechanism of abandoned rivers,well logging and seismic response characteristics can be classified as two major categories which include four classes integrating with satellite photographic and modern outcrop data.The identification of abandoned channels is achieved in the Bed PⅠ2 of meandering river deposition in the dense-well pattern block of Changyuan Oilfield,and this identification is verified by well pattern dilution.Based on our research,the abandoned channel identification accuracy is improved by more than 11%;the abandoned channel trend and combination have controlled geometric shapes and distribution characteristics of point bars,they also affect the remaining oil distribution;the abandoned channels are mainly of crevasse and diversion in the study area,their shapes show"S" type in plans;an abandoned channel crosses the area of interest with the length of 4.8 km and the width range of 60~130 m.The later development adjustment guided by our abandoned channel identification achieves satisfactory performances.

关 键 词：三维地震资料 曲流河 废弃河道 响应特征 长垣油田 

分 类 号：P631[天文地球—地质矿产勘探]