| 基于广义S变换的吸收衰减技术在YP地区稠油识别中的应用 |
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| 引用本文： | 张志伟,陈兆明,张忠涛,吴静,徐颖晶.基于广义S变换的吸收衰减技术在YP地区稠油识别中的应用[J].海洋地质动态,2020,36(1):67-73. |
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| 作者姓名： | 张志伟 陈兆明 张忠涛 吴静 徐颖晶 |
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| 作者单位： | 中海石油(中国)有限公司深圳分公司研究院,深圳518000;中海石油(中国)有限公司深圳分公司研究院,深圳518000;中海石油(中国)有限公司深圳分公司研究院,深圳518000;中海石油(中国)有限公司深圳分公司研究院,深圳518000;中海石油(中国)有限公司深圳分公司研究院,深圳518000 |
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| 基金项目： | “十三五”国家科技重大专项课题“南海东部海域勘探新领域及关键技术” |
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| 摘 要： | 地震波在穿过含油气储层时,由于受油气流体的黏滞性和内摩擦力影响,在频率上会表现为高频衰减快、低频衰减慢的特征,在频谱上就表现为整体能量向低频移动,使得低频能量相对增强。同时,前人大量研究表明流体黏度越大,黏滞性越强,对地震波的吸收衰减效果越明显。在所研究的YP地区,油气运移到浅部成藏,经历了大量的生物降解作用,原油具有比重大、黏度大的特性。利用频率域的吸收衰减技术在研究区这种特性的油层进行了识别,最终实验结果与已钻井结果吻合度较好,预测井也与实钻井相吻合,验证了该技术在该区应用的可行性。
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| 关 键 词： | 地震波 黏滞性 高频衰减 低频能量增强 生物降解 吸收衰减 |
APPLICATION OF ABSORPTION AND ATTENUATION TECHNOLOGY BASED ON GENERALIZED“S”TRANSFORM TO HEAVY OIL RECOGNITION IN YP AREA |
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| ZHANG Zhiwei,CHEN Zhaoming,ZHANG Zhongtao,WU Jing,XU Yingjing.APPLICATION OF ABSORPTION AND ATTENUATION TECHNOLOGY BASED ON GENERALIZED“S”TRANSFORM TO HEAVY OIL RECOGNITION IN YP AREA[J].Marine Geology Development,2020,36(1):67-73. |
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| Authors: | ZHANG Zhiwei CHEN Zhaoming ZHANG Zhongtao WU Jing XU Yingjing |
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| Institution: | (CNOOC(China)Co.Ltd..Shenzhen Branch Research Institute,Shenzhen 518000.China) |
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| Abstract: | Seismic waves are affected by the viscosity and internal friction of oil and gas fluid while they pass through oil and gas reservoirs.It is always observed that the fast attenuation occurs at high frequency and slow attenuation at low frequency in frequency,and the whole energy moves to low frequency in frequency spectrum,which makes the low frequency energy relatively enhanced.A large number of previous studies suggest that the thicker the fluid and the higher the viscosity,the str on ger the absorption and attenuation effect on seismic waves?In the YP area,when oil and gas migrate to shallow reservoirs,the crude oil becomes higher in specific gravity and viscosity due to severe biodegradation.Therefore,it is considered that the absorption attenuation technique in frequency domain should achieve better results in identifying the reservoirs with this characteristic.Fin ally,experimental results are in good agreement with the outputs of drilled wells,and the predicted well columns are also are well fit the actual,which verifies the feasibility of the application of the technology to the study area. |
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| Keywords: | seismic wave viscosity high frequency attenuation low frequency energy enhancement biodegradation absorption attenuation |
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