【摘要】 塔河油田奥陶系海相碳酸盐岩储层埋藏深,地震反射信号弱,且风化壳多为杂乱反射,储集体类型复杂多样,有裂缝、溶洞、孔洞等类型,纵横向非均质性强,勘探难度大,属世界级难题。针对上述难题,这里引入基于小波变换的地震分频技术,首先针对该区实际地质情况设计模型,检验了该方法的可行性;然后对该区碳酸盐岩储层进行了预测,预测结果与实钻数据相一致,由此可见,分频解释技术可以有效刻划碳酸盐岩储层空间分布特征。研究表明,经分频处理后的地震数据,其解释分辨率高于常规地震主频所能达到的分辨能力,不需要建立假设的模型,尊重原始地震数据,减少了人为因素干扰带来的假象。该项技术在确定油藏边界、储层预测方面具有独特的优势。更多还原

【Abstract】 Tahe oilfield′s carbonate reservoir is buried deeply with normal depth over 5300m.The dominated system of carbonate reservoirs are fractures,corrosive caverns and serious heterogeneity in plane,which are difficult for transverse prediction of the reservoir distribution.The describe of reservoirs using the tradition resolution method is very difficult.The paper expatiated basic theories and principles of wavelet transform and introduced the separate frequency interpretation technique by wavelet transform.Theoretic model near real deep based on the geological analysis results was made to prove the feasibility of separate frequency interpretation technique.Finally,this technology was applied to actual seismic data in Tahe oilfield,and the predicting results for oil and gas accorded with the drilling result.The spectral decomposition can improve effect of carbonate reservoir prediction.更多还原