技术方法

双反射偏移技术实现礁灰岩油藏断层和裂缝的有效预测

  • 范玲玲 ,
  • 宋荣彩 ,
  • 金文辉 ,
  • 王勇 ,
  • 王姝
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  • 1.中海石油(中国)有限公司深圳分公司; 2.北京安久吉利科贸有限公司
李彬(1972-),男,高级工程师,主要从事油气田开发地质和地球物理方面的研究工作。地址:(510240)广东省广州市江南大道 中168 号海洋石油大厦1506 室。E-mail:libin@cnooc.com.cn

网络出版日期: 2012-04-20

基金资助

“十一五”国家重大专项子课题“海相礁灰岩稠油油藏(特)高含水期精细开发技术研究”(编号:2008ZX05024-004-010)部分研究 成果。

Applying duplex wave migration technology to predict faults and fractures in reef limestone reservoir

  • FAN Lingling ,
  • SONG Rongcai ,
  • JIN Wenhui ,
  • WANG Yong ,
  • WANG Shu
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  • 1. Shenzhen Branch of CNOOC, Shenzhen 518067, China; 2. Beijing Anjiu Jili CO. Ltd., Beijing 100088, China

Online published: 2012-04-20

摘要

南海A 油田地层的内部结构复杂、地震资料分辨率低,对其断层和裂缝的预测较为困难。采用近年 发展起来的双反射偏移技术,对该油田开展了断层和裂缝预测。双反射偏移技术以精细处理的三维地震 炮集资料及叠前深度偏移的深度域速度模型为基础,通过双反射偏移速度扫描和偏移孔径分析,进一步 精细化速度模型,实施双反射偏移处理,获得断层和裂缝成像的三维数据体。通过对双反射偏移数据体及 其解释结果,以及深度偏移数据体及其沿层相干、倾角、振幅等属性,常规地震构造解释结果和钻井、测井 等信息进行联合解释,可了解并获得该油田断层和裂缝的性质及分布规律。双反射偏移技术不仅可以预 测与常规地震认识相一致的断裂系统,还可以有效分析根据常规地震资料难以预测的断层、裂缝及岩性 的突变界面。

本文引用格式

范玲玲 , 宋荣彩 , 金文辉 , 王勇 , 王姝 . 双反射偏移技术实现礁灰岩油藏断层和裂缝的有效预测[J]. 岩性油气藏, 2012 , 24(2) : 92 -97 . DOI: 10.3969/j.issn.1673-8926.2012.02.018

Abstract

Due to lowresolution seismic data and complex inner structure ofAoilfield in South China Sea, it is difficult to predict the faults and fractures. This paper adopted duplex wave migration(DWM) technology to predict the faults and fractures in this oilfield. Based on 3D seismic shot gather information and pre-stack depth migration velocity model in depth domain, combined with DWMvelocity scan and migration aperture analysis, DWMtechnology was used to refine the velocitymodel further, then obtained the 3D data of fault and fractures imaging. According to the DWMdata and its explaining results, depth migration data and its attributions, such as coherence cube, dip and amplitude and so on, structure explaining results by normal seismic explanation, drilling and logging data, the characteristics and distribution law of the faults and fractures of the oilfield were recognized. It is proved that the DWMtechnology can be used to not only predict the fault and fracture system, which can be predicted by normal seismic, but also predict those unpredictable fault, fracture, and lithologic interface.

参考文献

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