High-Density Full-Azimuth 3D Seismic Acquisition and Its Application on Fractured-Cavernous Carbonate Reservoirs
详细信息
- 责任者：Liu Yimou (School of Geosciences ; China University of Petroleum ; Qingdao 266580 ; China) ; Liang Xianghao
- 刊名：Geophysical Prospecting for Petroleum
- 出版年：2013
- 卷期：52(4)
- 关键词：三维地震法 ; three-dimensional seismic methods ; 碳酸盐岩储集层 ; carbonate reservoirs
- 页码：p.372-382
- 图表：illus., 1 table, 39 refs.
- 分类号：1600
- issnNo：ISSN1000-1441
- isbnNo：CN32-1284/TE
摘要
The Ordovician carbonate reservoirs in Tarim Basin are strong heterogeneous with dissolved caves,holes and fractures,and the seismic data are usually with low S/N.Conventional 3D seismic data are narrow-azimuth with large bin size and low fold.As a result,some problems appeared,such as inadequate lateral migration,lowaccuracy for small fracture-caves identification and fracture prediction.Aiming at the above characteristics of the carbonate reservoirs,we gave a detailed analysis on the impact of main geometry parameters(including bin size,fold and aspect ratio) on the imaging of fracture-cave reservoir and fine characterization.A high-density full-azimuth 3Dseismic acquisition with trace density reaching to as much as 100×10 4 traces per square kilometers was carried out in Northern Tarim Basin based on the analysis.The results show great improvement in imaging the fractured-cavernous reservoirs in any direction.Much more small caves are identified and the fracture prediction accuracy is improved considerably.
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