塔北Y地区海相裂缝性碳酸盐岩储层特征及预测

摘要

This paper analyses the development characteristics and main controlling factors of the marine fractured carbonate rock reservoirs in Y area of North Tarim Uplift and discusses the relation between reservoirs and fractures.Based on the core observation,it confirms the interaction between reservoirs and fractures.Then,it analyzes the seismic reflection characteristics of effective reservoirs by reservoir modeling and forward modeling of the single wells.The results show that the structural fractures can provide favorable paths for the development of the karst in Y area.The interaction of fractures and karst can from favorable reservoir spaces.The fractured reservoirs can from two kinds of seismic reflections,that is,the bead-like seismic reflection and the disorder reflection.The paper predicts the reservoir distribution using the seismic attribute of amplitude variability.The predicted results are coincidence with the developing rules of the fractures.%探讨塔北Y地区海相裂缝性碳酸盐岩储层发育特征、主控因素及分布规律.通过岩心观察研究储层与裂缝的相互关系,通过单井储层建模及模型正演,分析有效储层的地震反应特征.结果表明,在研究区构造裂缝为喀斯特发育提供有利通道,裂缝与喀斯特之间的相互作用,形成有利储集空间.裂缝性储层能形成“串珠”状及杂乱状反射2种地震响应特征.利用振幅变化率地震属性对储层分布进行了预测,预测结果与裂缝发育规律吻合.