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白云凹陷C16地区主要目的层受东北部东沙隆起碳酸盐岩台地影响,其砂体顶部灰岩广泛发育,且物性差异较大,传统的叠后波阻抗反演无法有效地区分砂岩、泥岩、灰岩,此外灰岩的物性情况是影响该区圈闭有效性和经济性的主要因素。结合区域地质背景及岩石物理分析,优选出密度与Mu-Rho交会组合作为岩性划分量版,并利用孔隙度与密度的相关性对灰岩物性进行预测,最终通过叠前同步反演技术得到目标区灰岩的物性分布特征,实钻结果表明,该技术具有较好的应用效果。
The main target formation in C16 area of Baiyun sag is affected by the Dongsha uplift carbonate platform in northeastern China. The limestone at the top of the sand body is extensively developed, and its physical properties are quite different. The traditional post-stack wave impedance inversion can not distinguish sandstone, Limestone, in addition, the physical property of limestone is the main factor that affects the validity and economy of traps in the area. According to the regional geological background and petrophysical analysis, the combination of density and Mu-Rho is selected as the lithologic division quantity, and the correlation between porosity and density is used to predict the physical property of limestone. Finally, the result of prestack synchronization inversion The distribution of physical properties of the limestone in the target area shows that the technique has a good application effect.