地震属性在普光气田储层地质建模中的应用

Application of Seismic Attribute in Geologic Modeling of Puguang Gas Field

普光气田长兴飞仙关组储集层为厚层碳酸盐岩沉积,储层孔隙受成岩作用的改造,具有很强的非均质性,给地质建模带来很大困难。另外,由于开发井网密度低,完全依赖井资料无法精确描述储层在空间上的变化特征。但是研究区内沉积相分布面积广,垂向和平面上的相带变化缓慢,并且三维地震数据品质较高,基质孔隙度曲线与地震波阻抗有良好的负相关性。针对以上情况,应用Petrel地质建模软件,充分发挥地震属性和测井数据各自的优势,建立普光气田高精度三维地质模型。

Changxing-Feixianguan Reservoirs in Puguang Gas Field were thick carbonate sediments,influenced by diagenesis reconstruction,there existed very strong heterogeneity in reservoir porosity distribution,it caused great difficulties for geological modeling.Furthermore,because of low drilling density,reservoir properties in space could not be precisely described solely based on well information.But depositional facies were widely distributed,facies belt was changed slowly in vertical and horizontal directions,quality of 3D seismic data was high,good correlation between porosity curve and seismic wave impedance was obtained.In allusion to problem stated above,a geological modeling software Petrel is used to establish a high accuracy 3D geologic model by fully using the advantages of seismic attribute and seismic wave impedance.