松辽盆地北部扶杨油层河道砂体的地震识别方法研究(英文)
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摘要
应用地震技术预测和识别扶杨油层河道砂体是当前松辽盆地北部的油气勘探中最为急需的技术之一。本文以GTZ地区为例,探讨了扶杨油层河道砂体的成因特点,指出地震的低分辨率,河道砂体的薄互层、横向变化快、储层非均质性强等地质特点,是当前应用地震技术识别扶杨油层河道砂体的困难所在。文中介绍了当前技术条件下河道识别的两种方法:利用频谱成像技术和叠前方位各向异性技术进行河道识别的方法和思路。以扶余油层为目的层说明了应用上述两种方法识别河道砂体的良好效果,并和已知井资料进行对比,符合率可达80%。
The Fuyang oil-layer in North Songliao Basin is characterized by thin interbedded sands and shales, strong lateral variation, strong reservoir heterogeniety, and so on. The thickness of individual sand layers is generally 3 - 5 m. Identifying the channel sand-bodies of the Fuyang oil layer using seismic techniques is very difficult due to the low seismic resolution. Taking the GTZ area as an example, we discuss the genetic characteristics of the channel sand-bodies and point out the real difficulty in using seismic techniques to predict the channel sand-bodies. Two methods for the identification of channels are presented: frequency spectrum imaging and pre-stack azimuthal anisotropy. Identifying the channel sand-bodies in Fuyu oil-layer using the two seismic methods results in a success rate up to 80% compared with well data.
The Fuyang oil-layer in North Songliao Basin is characterized by thin interbedded sands and shales, strong lateral variation, strong reservoir heterogeniety, and so on. The thickness of individual sand layers is generally 3 - 5 m. Identifying the channel sand-bodies of the Fuyang oil layer using seismic techniques is very difficult due to the low seismic resolution. Taking the GTZ area as an example, we discuss the genetic characteristics of the channel sand-bodies and point out the real difficulty in using seismic techniques to predict the channel sand-bodies. Two methods for the identification of channels are presented: frequency spectrum imaging and pre-stack azimuthal anisotropy. Identifying the channel sand-bodies in Fuyu oil-layer using the two seismic methods results in a success rate up to 80% compared with well data.
引文
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Ji T. Z., Yang Y. J., and Li S. L., 2003, Application of coherence technology in the prediction of channel sand: Geophysical Prospecting for Petroleum, 42 (3), 399 - 401.
Jiang Y., Zhou Z. L., and Qin Y. S., 2000, Neural network lithology identification technique of seismic attribute analysis and its application: Petroleum Geology & Oilfield Development in Daqing, 19 (5), 39 - 41.
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Wu H. Y., Meng Q. A., and Yang Y. F., 2003a, Finegeologic research and exploration target choosing for shallow layers in Songliao Basin: Exploration and Development Research Institute of Daqing Oilfield Company Ltd., Internal Report.
Wu S. H., Li Z. R., and Long Z. Q., 2003b, Application of horizon seismic attribute analysis in reservoir study in Northeast Sichuan: Computing Techniques for Geophysical and Geochemical Exploration, 25 (3), 201 - 206.
Xie D., Wang Y. G., and Yue Q. X., 2003, Application of seismic attribute analysis technology in the production of Ziyin Oilfield: Geophysical Prospecting for Petroleum, 42 (1), 72 - 76.
Yu X. H., 2002, Hydrocarbon reservoir sedimentology of clastic rock series: China University of Geosciences Press, Beijing, 63 - 64.
Sheriff, R. E., and Geldart, L. P., 1995, Exploration seismology: Cambridge University Press.
Feng K., Zha Z. Y., and Zhong D. Y., 2006, Integrated application of inversion and spectral image technology in the reservoir prediction: Geophysical Prospecting for Petroleum, 45 (3), 262 - 265.
Ji T. Z., Yang Y. J., and Li S. L., 2003, Application of coherence technology in the prediction of channel sand: Geophysical Prospecting for Petroleum, 42 (3), 399 - 401.
Jiang Y., Zhou Z. L., and Qin Y. S., 2000, Neural network lithology identification technique of seismic attribute analysis and its application: Petroleum Geology & Oilfield Development in Daqing, 19 (5), 39 - 41.
Qiu Y. N., Xue S. H., and Ying F. X., 1997, Non-marine hydrocarbon reservoir in China: China Petroleum Industry Press, Beijing, 172 - 175.
Wu H. Y., Meng Q. A., and Yang Y. F., 2003a, Finegeologic research and exploration target choosing for shallow layers in Songliao Basin: Exploration and Development Research Institute of Daqing Oilfield Company Ltd., Internal Report.
Wu S. H., Li Z. R., and Long Z. Q., 2003b, Application of horizon seismic attribute analysis in reservoir study in Northeast Sichuan: Computing Techniques for Geophysical and Geochemical Exploration, 25 (3), 201 - 206.
Xie D., Wang Y. G., and Yue Q. X., 2003, Application of seismic attribute analysis technology in the production of Ziyin Oilfield: Geophysical Prospecting for Petroleum, 42 (1), 72 - 76.
Yu X. H., 2002, Hydrocarbon reservoir sedimentology of clastic rock series: China University of Geosciences Press, Beijing, 63 - 64.
Sheriff, R. E., and Geldart, L. P., 1995, Exploration seismology: Cambridge University Press.
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