岩性油气藏 ›› 2019, Vol. 31 ›› Issue (4): 112–120.doi: 10.12108/yxyqc.20190412

• 勘探技术 • 上一篇    下一篇

基于叠前OVT域偏移的河道砂体预测方法

周华建   

  1. 中国石油大庆油田有限责任公司 勘探开发研究院, 黑龙江 大庆 163712
  • 收稿日期:2018-12-17 修回日期:2019-04-25 出版日期:2019-07-21 发布日期:2019-06-21
  • 第一作者:周华建(1984-),男,工程师,主要从事油田开发、地震解释与应用方面的研究工作。地址:(163712)黑龙江省大庆市让胡路区科苑路18号大庆油田勘探开发研究院地震解释二室。Email:zhouhuajian@petrochina.com.cn。
  • 基金资助:
    国家重大科技专项"大庆长垣特高含水油田提高采收率示范工程"（编号：2016ZX05054）资助

Prediction method of channel sand body based on prestack migration in OVT domain

ZHOU Huajian   

  1. Research Institute of Exploration and Development, PetroChina Daqing Oilfield Company Ltd., Daqing 163712, Heilongjiang, China
  • Received:2018-12-17 Revised:2019-04-25 Online:2019-07-21 Published:2019-06-21

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摘要： 大庆长垣萨尔图油田萨葡高油层属于陆相大型河流-三角洲沉积，层多层薄，砂泥互层频繁。利用常规叠后地震储层预测方法只能预测部分相对较厚的河道砂体，精度低，井震结合储层描述技术不利于在长垣油田萨葡高油层中全面推广应用。利用萨尔图高密度地震资料的优势，进行叠前地震OVT域的处理，保留了数据体中炮检距和方位角2个参数，以地震沉积学为手段，分析了不同方位地层切片反映储层砂体特征的振幅属性，结合研究区的地貌学特征预测薄互层河道砂体，井震结合储层描述，进一步提高了河道砂体的预测精度，与基于常规地震资料相比，精度提高15%以上。该方法为指导长垣油田井间剩余油描述和挖潜提供了有效手段。

关键词: OVT域, 炮检距, 方位角, 薄互层, 储层预测, 河道砂体

Abstract: The Sapugao reservoir in Saertu oilfield,Daqing Placanticline,is a typical clastic fluvial-delta deposit with thin interbed of sandstone and shale,and frequent sand-mud interbedding. Conventional poststack seismic reservoir prediction method can only predict some relatively thick channel sand bodies with low accuracy,and well-seismic combined with reservoir description technology is not conducive to the comprehensive application of Sapugao reservoir in Placanticline oilfield. Taking advantage of high-density seismic data from Saertu oilfield, the processing of prestack seismic data in OVT domain was carried out,and two parameters of offset and azimuth were retained in the data volume. By means of seismic sedimentology,the amplitude attributes of stratal slices in different directions reflecting the characteristics of reservoir sand bodies were analyzed. The thin interbedded channel sand bodies were predicted according to the geomorphological characteristics of the study area, and the prediction accuracy of channel sand bodies was further improved by combining well and seismic data more than 15%. This method provides an effective means to guide the description and tapping of interwell residual oil in Placanticline oilfield. with reservoir description. Compared with conventional seismic data,the prediction accuracy was improved by more than 15%. This method provides an effective means to guide the description and tapping of interwell residual oil in Placanticline oilfield.

Key words: OVT domain, offset, azimuth angle, thin interbed, reservoir prediction, channel sand body

中图分类号: 

  • P631
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