塔里木盆地吉拉克地区东河砂岩尖灭线地震预测技术与应用  

Seismic prediction of Donghe sandstone pinch-out line in Jilake,Tarim Basin

作　　者：马德波[1,2] 贾进华[1] 申银民[3] 陈秀艳[1] 王月然[3] 陈延贵[3] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国地质大学(北京)能源学院,北京100083 [3]中国石油塔里木油田公司,新疆库尔勒841000

出　　处：《石油地球物理勘探》2017年第1期94-104,共11页Oil Geophysical Prospecting

基　　金：国家油气重大专项"岩性地层油气藏成藏规律;关键技术及目标评价"(2011ZX05001);中国石油天然气股份有限公司重大科技专项"岩性地层油气藏成藏规律研究与关键技术攻关"(2014B-0307)联合资助

摘　　要：针对塔里木盆地吉拉克地区石炭系东河砂岩尖灭线预测不准的难题,建立了东河砂岩尖灭线地震预测技术流程。该技术流程主要包括4个部分:1利用"残余厚度法"进行古地貌恢复,初步确定超覆尖灭线的宏观分布;2利用全波场地震正演技术明确东河砂岩的地震反射特征;3通过对地震正演记录进行地震属性分析、频谱分解,构建薄层检测因子、峰值振幅频率比,进行尖灭线分布的地震预测;4寻找研究区内东河砂岩与下伏地层夹角、地震预测尖灭线与实际地层尖灭线误差两者之间的定量关系式,进行尖灭线定量外推,最终得到实际的东河砂岩尖灭线。该技术在吉拉克地区东河砂岩超覆尖灭线预测中取得了良好的应用效果。In order to predict Donghe sandstone pinch-out line in Jilake,Tarim Basin,we propose in this paper a seismic prediction approach.The approach includes four steps: Pinch-out line macro distribution prediction with paleo-geomorphology restoration; Seismic reflection characteristics determination with full-wave seismic forward modelling; Based on seismic attribute analysis and spectral decomposition,pinch-out line distribution prediction with thin bed indicator and peak-amplitude to peak-frequency ratio; (4)Pinch-out line is quantitatively extrapolated by a quantitative relation between the angle of Donghe sandstone and underlying strata and the errors of predicted pinch-out line and real stratigraphic pinch-out line.Finally the Donghe sandstone pinch-out line is obtained.Our application in Jilake area,Tarim Basin prove that the proposed approach gets effective prediction © 2017, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved.

关 键 词：东河砂岩 尖灭线 古地貌恢复 地震正演 地震属性 频谱分解 塔里木盆地 

分 类 号：P631[天文地球—地质矿产勘探]