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科技导报  2014 

塔中北斜坡碳酸盐岩裂缝分布特征叠前叠后综合预测方法

DOI: 10.3981/j.issn.1000-7857.2014.h2.009, PP. 70-74

Keywords: 碳酸盐岩,裂缝分布,叠后相干属性,叠前P波方位AVO反演

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Abstract:

针对塔中北斜坡碳酸盐岩内多期应力作用下形成的裂缝,研究了采用叠前P波方位AVO反演和叠后相干属性相结合的裂缝分布特征预测方法。结果显示,塔中北斜坡碳酸盐岩内发育单组裂缝和多组裂缝,叠后相干属性预测的裂缝多与断裂控制的裂缝分布一致,这些裂缝多发育在断裂破碎带中,由于断裂附近为两个方向的应力释放区,北东向和北西向裂缝都易发育,易形成多组裂缝;叠前P波方位AVO反演预测的裂缝多分布在隆起、背斜顶部,由于隆起、背斜等构造带主要受北东向挤压应力作用,易形成单个方向的裂缝(单组裂缝)。结果表明,叠后预测能够表述裂缝与断裂之间的关系,而叠前预测则能够补充表述断裂之间的裂缝分布,两者结合的预测方法能够更准确地揭示裂缝分布特征,且与塔中北斜坡的地质规律相符合。

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