基于吸收滤波与AVO技术的地震烃类检测技术
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摘要
为进一步提高海上油气勘探的准确性,有必要利用更有效的油气预测方法来降低勘探风险,从而提高勘探成功率。传统的亮点、暗点烃类指示方法对低信噪比资料并不能取得很好的效果,而AVO方法也因其苛刻的使用条件而使其油气预测效果并不很好。针对这个问题,提出联合利用地震频率信息和振幅信息的Proni吸收滤波技术与AVO技术的方法来进行地层的含油气性检测,利用碳氢指示、属性交会等技术方法探测烃类异常,最后通过在南海西部某区域的烃类检测中应用并取得了很好的效果,证明了联合利用地震频率吸收属性和AVO效应可以更好地进行油气预测。
It is essential to apply effective oil and gas prediction to minimize the exploration risks and increase exploration successful rate,consequently enhance the accuracy of marine oil and gas exploration.No good results can be obtained for the seismic data with low S/N by using the traditional hydrocarbon indication methods such as bright spot and dim spot techniques,and no good oil and gas prediction effects can be obtained with AVC)method due to its rigorous application conditions.Hence,the paper presented a method combining Proni absorption filtering technique and AVO technique to make use of the frequency information and amplitude information together to detect oil and gas in the reservoir;then,the paper adopted such techniques as hydrocarbon indicator technique and attribute crossplot method to detect the hydrocarbon anomalies:finally,the paper applied this technique to perform hydrocarbon detection in West South Sea.and good application effects have been gained,which show joint use of the seismic frequency absorption attribute and AVO effects can predict oil and gas better.
It is essential to apply effective oil and gas prediction to minimize the exploration risks and increase exploration successful rate,consequently enhance the accuracy of marine oil and gas exploration.No good results can be obtained for the seismic data with low S/N by using the traditional hydrocarbon indication methods such as bright spot and dim spot techniques,and no good oil and gas prediction effects can be obtained with AVC)method due to its rigorous application conditions.Hence,the paper presented a method combining Proni absorption filtering technique and AVO technique to make use of the frequency information and amplitude information together to detect oil and gas in the reservoir;then,the paper adopted such techniques as hydrocarbon indicator technique and attribute crossplot method to detect the hydrocarbon anomalies:finally,the paper applied this technique to perform hydrocarbon detection in West South Sea.and good application effects have been gained,which show joint use of the seismic frequency absorption attribute and AVO effects can predict oil and gas better.
引文
[1]陆基孟.地震勘探原理[M].东营:石油大学出版社,1993.
[2]杜世通.地震技术识别与描述超薄储层的潜力与局限[J].石油地球物理勘探,2005,40(6):652-662.
[3]许多,李正文,甘其刚.AVO在复杂碳酸盐岩储层中的应用[J].天然气工业,2004,24(12):54-56.
[4]张洪波,王纬,顾汉明.高精度地震属性储层预测技术研究[J].天然气工业,2005,25(7):35-37.
[2]杜世通.地震技术识别与描述超薄储层的潜力与局限[J].石油地球物理勘探,2005,40(6):652-662.
[3]许多,李正文,甘其刚.AVO在复杂碳酸盐岩储层中的应用[J].天然气工业,2004,24(12):54-56.
[4]张洪波,王纬,顾汉明.高精度地震属性储层预测技术研究[J].天然气工业,2005,25(7):35-37.
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