Prestack Gather Optimization Technique and Application

doi:10.11885/j.issn.1674-5086.2016.07.21.02

Abstract

Abstract: This research presents an optimization technique involving the combination of prestack gather "noise suppression-equalization-reduction" with the improvement of the AVO (Amplitude variation with offset) analysis accuracy as the starting point. First, the characteristics of the effective and interference waves of the target formation of the prestack gather were analyzed; next, random noise from the target formation was removed using a fourth-order polynomial fit; then, the phase-axis target formation gathers were equalized using non-surface-consistent residual static correction. Finally, the effective incidence angle selection range for the target formation was optimized to reduce big-offset, stretched or distorted gathers. The practical application in some areas of the Bohai Sea shows that the signal-to-noise ratio between the optimized gathers and stacked profile improved significantly. Moreover, the AVO-curve characteristics of the target formation became more apparent and the obtained AVO-characteristics prediction results conformed more closely with the actual drilling conditions.

Key words: prestack gather, optimization, layer flattening, stacked profile, AVO analysis

CLC Number:

TE122

XIONG Xiaojun, JIAN Shikai, LI Xiang, LIU Yang. Prestack Gather Optimization Technique and Application[J]. 西南石油大学学报(自然科学版), 2017, 39(6): 55-62.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2016.07.21.02

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References

[1] 贾承造,赵文智,邹才能,等. 岩性地层油气藏地质理论与勘探技术[M]. 北京:石油工业出版社,2008. JIA Chengzao, ZHAO Wenzhi, ZOU Caineng, et al. Geological theory and exploration technology of lithologic stratigraphic oil and gas reservoir[M]. Beijing:Petroleum Industry Press, 2008.
[2] 邹贤军. JSB地区叠前反演道集优化处理[J]. 内蒙古石油化工,2015(7):32-35. ZOU Xianjun. Gather conditioning for prestack inversion in JSB area[J]. Inner Mongolia Petrochemical Industry, 2015(7):32-35.
[3] 鲍熙杰. 叠前AVA同时反演的道集优化处理及应用效果[J]. 断块油气田. 2013,20(3):283-285. doi:10.6056/dkyqt201303003 BAO Xijie. Gather optimal processing and application effect of prestack AVA instantaneous inversion[J]. FaultBlock Oil & Gas Field, 2013, 20(3):283-285. doi:10.6056/dkyqt201303003
[4] 张津海,张远银,孙赞东. 道集品质对叠前AVO/AVA同时反演的影响[J]. 石油地球物理勘探,2012,47(1):68-73. ZHANG Jinhai, ZHANG Yuanyin, SUN Zandong. The effects of seismic data conditioning on pre-stack AVO/AVA simultaneous inversion[J]. Oil Geophysical Prospecting, 2012, 47(1):68-73.
[5] 熊定钰,钱忠平,赵波. 拟合AVO属性反演[J]. 石油地球物理勘探,2005,40(6):646-651. doi:10.13810/j.cnki.issn.1000-7210.2005.06.007 XIONG Dingyu, QIAN Zhongping, ZHAO Bo. Inversion of fitted AVO attributes[J]. Oil Geophysical Prospecting, 2005, 40(6):646-651. doi:10.13810/j.cnki.issn.1000-7210.2005.06.007
[6] 张雅君,侯斌,陈岭. 叠前地震反演道集数据的预处理[J]. 复杂油气藏,2014,7(1):35-37. doi:10.3969/j.issn.1674-4667.2014.01.012 ZHANG Yajun, HOU Bin, CHEN Ling. The gather data preprocessing of prestack seismic inversion[J]. Complex Hydrocarbon Reservoirs, 2014, 7(1):35-37. doi:10.3969/j.issn.1674-4667.2014.01.012
[7] 吴常玉,王棣,王立歆,等. 叠前预处理技术[J]. 石油地球物理勘探,2007,42(1):34-37. doi:10.13810/j.cnki.issn.1000-7210.2007.01.007 WU Changyu, WANG Di, WANG Lixin, et al. Prestack preprocessing technology[J]. Oil Geophysical Prospecting, 2007, 42(1):34-37. doi:10.13810/j.cnki.issn.10007210.2007.01.007
[8] 程玉坤,冉建斌,肖伟. 基于CRP道集的叠前处理技术及应用[J]. 勘探地球物理学进展,2008,31(1):38-43. CHENG Yukun, RAN Jianbin, XIAO Wei. CRP gather based prestack data processing and its application[J]. Progress in Exploration Geophysics, 2008, 31(1):38-43.
[9] 刘素芹,何旭莉,何潮观,等. 叠前深度偏移及应用研究[J]. 西南石油大学学报(自然科学版),2009,31(4):35-37. doi:10.3863/j.issn.1674-5086.2009.04.007 LIU Suqin, HE Xuli, HE Chaoguan, et al. Study on prestack depth migration and the application[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2009, 31(4):35-37. doi:10.3863/j.issn.1674-5086.2009.04.007
[10] 张征,狄帮让,胡英,等. CRP道集叠前精细处理技术应用[J]. 科技导报,2012,30(27):35-40. doi:10.3981/j.issn.1000-7857.2012.27.004 ZHANG Zheng, DI Bangrang, HU Ying, et al. Application of pre-stack detailed process technique on CRP traces gather[J]. Science & Technology Review, 2012, 30(27):35-40. doi:10.3981/j.issn.1000-7857.2012.27.004
[11] 许自龙,孟繁举,唐勇,等. 叠前反演数据优化处理技术[J]. 石油物探,2014,53(4):404-411. doi:10.3969/j.issn.1000-1441.2014.04.005 XU Zilong, MENG Fanju, TANG Yong, et al. Seismic data optimization processing techniques for pre-stack inversion[J]. Geophysical Prospecting for Petroleum, 2014, 53(4):404-411. doi:10.3969/j.issn.1000-1441.2014.04.005
[12] 许璐,刘志成,王小青,等. 基于结构中值滤波的CRP道集优化处理技术[J]. 地球物理学进展,2015,30(4):1804-1810. doi:10.6038/pg20150438 XU Lu, LIU Zhicheng, WANG Xiaoqing, et al. Optimization technology based on structure median filter for CRP gathers[J]. Progress in Geophysics, 2015, 30(4):1804-1810. doi:10.6038/pg20150438
[13] 周鹏,张益明,刘志斌,等. 地震道集优化方法及应用[J]. 石油地球物理勘探,2016,51(2):232-237. ZHOU Peng, ZHANG Yiming, LIU Zhibin, et al. Seismic gather optimization[J]. Oil Geophysical Prospecting, 2016, 51(2):232-237.
[14] HINKLEY D, BEAR G W, DAWSON C. Prestack gather flattening for AVO[C]//SEG Technical Program Expanded Abstracts. 1999:271-273. doi:10.1190/1.1839719
[15] CANNING A. Some practical aspects of amplitude recovery before AVO and inversion[C]//SEG Technical Program Expanded Abstracts. 2010:393-397. doi:10.1190/1.3513672
[16] 刘力辉,杨晓,丁燕,等. 基于岩性预测的CRP道集优化处理[J]. 石油物探,2013,52(5):483-488. doi:10.3969/j.issn.1000-1441.2013.05.006 LIU Lihui, YANG Xiao, DING Yan, et al. CRP Gather optimization processing based on lithological prediction[J]. Geophysical Prospecting for Petroleum, 2013, 52(5):483-488. doi:10.3969/j.issn.1000-1441.2013.05.006
[17] 应明雄,陈殿远,刘建英,等. 琼东南盆地LS区近道地震反射性质研究及意义[J]. 西南石油大学学报(自然科学版),2016,38(3):46-54. doi:10.11885/j.issn.16745086.2014.09.18.08 YING Mingxiong, CHEN Dianyuan, LIU Jianying, et al. The nature and significanceof shortcut seismic reflection in the LS Area in Qiongdongnan Basin[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2016, 38(3):46-54. doi:10.11885/j.issn.16745086.2014.09.18.08
[18] 康冶,于承业,贾卧,等. f-x域去噪方法研究[J]. 石油地球物理勘探,2003,38(2):136-138. doi:10.13810/j.cnki.issn.1000-7210.2003.02.006 KANG Ye, YU Chengye, JIA Wo, et al. Study on noisesuppression method in f-x domain[J]. Oil Geophysical Prospecting, 2003, 38(2):136-138. doi:10.13810/j.cnki.issn.1000-7210.2003.02.006
[19] 钟伟,杨宝俊,张智. 多项式拟合技术在强噪声地震资料中的应用研究[J]. 地球物理学进展,2006,21(1):184-189. doi:10.3969/j.issn.1004-2903.2006.01.027 ZHONG Wei, YANG Baojun, ZHANG Zhi. Research on application of polynomial fitting technique in highly noisy seismic data[J]. Progress in Geophysics, 2006, 21(1):184-189. doi:10.3969/j.issn.1004-2903.2006.01.027
[20] 陈辉,贺玉山,李录明,等. 基于保幅延拓算子的共成像点道集敏感性分析[J]. 西南石油大学学报(自然科学版),2010,32(3):35-40. doi:10.3863/j.issn.16745086.2010.03.007 CHEN Hui, HE Yushan, LI Luming, et al. Sensitivity analysis of common mage gathers based on preserved amplitude continuation operator[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2010, 32(3):35-40. doi:10.3863/j.issn.1674-5086.2010.03.007
[21] 荆雅莉. 叠前道集优化处理在浅层气预测中的应用[J]. 断块油气田,2015,22(6):717-721. doi:10.6056/dkyqt201506008 JING Yali. Application of prestack gather optimization preprocessing to prediction of shallow gas[J]. Fault-Block Oil & Gas Field, 2015, 22(6):717-721. doi:10.6056/dkyqt201506008
[22] 刘仕友,周家雄,孙万元,等. 基于优化处理的宽角度道集密度反演及应用[J]. 物探与化探,2016,40(2):417-422. doi:10.11720/wtyht.2016.2.30 LIU Shiyou, ZHOU Jiaxiong, SUN Wanyuan, et al. The density inversion based on optimized wide-angle gathers and its application[J]. Geophysical and Geochemical Exploration, 2016, 40(2):417-422. doi:10.11720/wtyht.2016.2.30
[23] 陈春燕,晋达,董秀伟. 叠前道集质量优化方法研究[J]. 中国石油和化工标准与质量,2014(9):63. CHEN Chunyan, JIN Da, DONG Xiuwei. Research about quality optimization method of pre-stack gathers[J]. China Petroleum and Chemical Standard and Quality, 2014(9):63.
[24] 骆璞,王显,姜传芳. AVO属性技术在含气砂岩储层预测中的应用[J]. 复杂油气藏,2014,7(4):32-34,56. doi:10.3969/j.issn.1674-4667.2014.04.008 LUO Pu, WANG Xian, JIANG Chuanfang. Application of AVO attribute technology in the prediction of gas-bearing sandstone[J]. Complex Hydrocarbon Reservoirs, 2014, 7(4):32-34, 56. doi:10.3969/j.issn.1674-4667.2014.04.008
[25] 陆基孟,王永刚. 地震勘探原理[M]. 东营:石油大学出版社,2009. LU Jimeng, WANG Yonggang. Principle of seismic exploration[M]. Dongying:China University of Petroleum Press, 2009.