地震属性技术在鸭儿峡白垩系K_1g_1油藏精细勘探中的应用

Reservoir prediction in Yaerxia with seismic attributes

鸭儿峡白垩系K_1g_1油藏为构造—岩性油藏,断裂发育,构造复杂,储层为溶蚀孔隙型,非均质性强,有效储层预测困难。GeoEast系统用于预测储层的地震属性种类繁多,作用不尽相同,优选相对比较敏感的相干、曲率等地震属性对研究区开展构造精细解释、储层预测,落实断裂系统、预测裂缝发育区;利用均方根振幅、高亮体等属性预测砂体平面展布,刻画河道厚砂体;利用流体活动性检测属性预测有效储层展布。实际应用表明,构造与储层预测属性相结合,落实了油藏面积,实施新井钻探,效果较好。

The Cretaceous K1g1 Reservoirs in Yaerxia are lithology-structural reservoirs,in which faults are well-developed and structures are complicated.Reservoirs of this area have dissolvable porosity type with high heterogeneity.So it is very difficult to predict these reservoirs.From the seismic attributes approaches provided by GeoEast System,some sensitive ones such as coherence and curvature,are optimized for structure interpretation,reservoir prediction,fault system identification,and fracture classified.Other seismic attributes such as root-mean-square amplitude and highlight volume are used to predict favorable channel sand distributions,sand thickness,and fluide activity.Both structure interpretation and reservoir prediction are achievd based on well logging and seismic data.The drilling depoyed on our reseach makes great success.