地震趋势异常识别技术及其在碳酸盐岩缝洞型储层预测中的应用——以塔里木盆地英买2井区为例  

Principles and application of a seismic trend anomaly diagnostic technique:a case study on carbonate fractured-cavity reservoirs in Yingmai 2 area,Tarim Basin

作　　者：姚清洲[1] 孟祥霞[1] 张虎权[1] 王锦喜[1] 

机构地区：[1]中国石油勘探开发研究院西北分院,甘肃兰州730020

出　　处：《石油学报》2013年第1期101-106,共6页Acta Petrolei Sinica

基　　金：国家重大科技专项"海相碳酸盐岩储层地震描述与油气藏有效预测"(2011ZX05004-003)资助

摘　　要：针对碳酸盐岩缝洞型储层,特别是杂乱弱振幅反射特征的储层预测难度较大。在对地震反射波形成机理分析的基础上,提出了地震趋势异常识别碳酸盐岩缝洞型储层的新方法。该方法利用趋势面分析技术,近似求取地层界面反射波,根据波的叠加原理,有效分解出缝洞型储层的地震响应,达到对缝洞型储层有效预测的目的。地震趋势异常技术不但能识别"串珠"状地震反射所代表的储层,同时可有效识别"杂乱"状弱振幅地震反射所代表的储层,这一新方法补充了缝洞型储层预测的方法,为井位部署提供依据,在实际应用中效果良好。As for carbonate fractured-cavity reservoirs, especially for those characterized by chaotic weak reflection, it is very difficult to make a reservoir prediction. Based on analyzing formation mechanism of seismic reflection, a new method to recognize carbonate fractured-cavity reservoirs by using seismic trend anomaly was proposed. This method uses a technique of trend surface analysis to approximately obtain the interface reflection wave, effectively decomposes seismic reflection of fractured-cavity reservoirs according to principles of wave superposition, and finally predicts fractured-cavity carbonate reservoirs efficiently. The technique can not only recognize reservoirs represented by ＂beadlike＂ seismic reflection but also those by ＂chaotic＂ seismic reflection with weak amplitude. The method has produced good effects in practical application, such as providing a significant reference value for the geometric ar- rangement of wells and complementing the prediction of fractured-cavity reservoirs in the carbonate area of Tarim Basin.

关 键 词：碳酸盐岩储层 地震反射 趋势面分析 波形分解 “串珠”状强振幅 “杂乱”状弱振幅 

分 类 号：P631.4[天文地球—地质矿产勘探]