匹配追踪旁瓣压制方法在四川盆地栖霞组储层识别中的应用
Natural Gas Exploration and Development（2020）
Abstract
在四川盆地中二叠统栖霞组白云岩储层预测中,基于地震资料的"亮点反射"储层识别模式由于地层速度结构的复杂性而存在多解.以四川盆地中部地区环乐山—龙女寺古隆起带,利用二维及三维地震资料,首次应用基于匹配追踪旁瓣压制方法预测四川盆地环古隆起带的栖霞组白云岩储层,刻画环古隆起带栖霞组有利储层发育区.研究结果表明:①栖霞组内部储层地震反射受到下伏地层子波旁瓣叠加的影响,造成地震响应存在假象,古隆起外围区受到栖一段泥晶灰岩、梁山组泥页岩、奥陶系页岩共同产生干涉的影响,造成栖霞组储层地震响应调谐增强,影响程度大于古隆起主体区;②相对于传统地震资料,基于匹配追踪旁瓣压制方法能够有效地消除下伏地层形成的子波旁瓣对于栖霞组储层地震成像的影响,降低了储层识别的多解性,同时,提高了深层储集体的分辨能力.
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