基于蚂蚁体的“相”控地质建模

Facies-controlled geological modeling based on ant body

任丘潜山雾迷山组碳酸盐岩油藏具有构造断裂系统复杂、油藏纵横向各向异性强的特点,其储集空间复杂,由孔隙、裂缝及溶洞组成,储层的发育程度主要受裂缝控制.如果采用传统的方法建立该油藏的三维地质模型,即从测井解释的物性参数出发应用随机建模方法进行模拟,无法反映出油藏复杂缝洞系统的几何特性,所建模型不能很好地体现储层的展布特征.已有研究表明基于地震资料的蚂蚁属性体可以全面地展现油藏断裂系统的空间分布.因此,基于蚂蚁属性体与成像测井资料建立该油藏的"裂缝发育相",进而进行裂缝发育相控建模.储量及储层参数检验表明该方法建立的地质模型与实际更为吻合,突破了传统意义上的相控建模方法,对缝洞型碳酸盐岩储层的三维地质建模具有良好的推广作用.

Wumishan carbonate reservoir of Renqiu buried hill is of complex fault system and strong vertical and horizontal reservoir anisotropy.The reservoir space is composed of pores,fractures and dissolved holes,and the reservoir development is mainly controlled by fractures.Because of these reservoir characteristics,the 3D geological model established using the traditional modeling method based on the physical parameters of log interpretation cannot reflect the geometric features of the complicated fracture-cave system of the reservoir,and therefore it cannot well reflect the distribution characteristics of the reservoir.The studies show that the ant attribute body based on seismic data can fully display the spatial distribution of reservoir fault system.Therefore,＂the fracture development facies＂ model of the reservoir based on the ant attribute body and the imaging logging data is established,and the fracture facies-controlled geological modeling of the reservoir based on the ant body is carried out.The examination of reserves and reservoir parameters shows that compared with traditional modeling method,the geological models established using the modeling method are more consistent with the practice.The fracture facies-controlled geological modeling method is suitable to the 3D geological modeling of the fracture-cave carbonate reservoir.