基于岩石物理相分析的复杂储层测井综合评价--以福山油田永安地区流沙港组一段储层为例

Comprehensive Logging Evaluation of Complex Reservoirs Based on the Analysis of Petrophysical Facies——By Taking the Reservoir in the 1^(st) Member of Liushagang Formation in Yong'an Region of Fushan Oilfield for Example

以岩心、薄片、压汞、测井等测试资料为依据,在福山油田永安地区流沙港组一段沉积微相、成岩相、构造相特征研究的基础上,总结了研究区储层的4种岩石物理相类型:有利沉积相带粒间不稳定组分溶蚀成岩相,有利沉积相带粒内不稳定组分溶蚀成岩相,不利沉积相带不稳定组分溶蚀成岩相,不利沉积相带自生矿物充填致密成岩相。研究发现,各类岩石物理相具有不同的孔、渗关系和不同的岩电参数特征,因此在岩石物理相识别基础上分类建立了物性模型和饱和度模型,大大提高了解释精度,很好地解决了永安地区储层横向变化快导致的测井解释符合率低的问题。

By taking the core data,thin slice mercury injection,well logging and well test data as well as the study of sedimentary micro-facies,diagenetic facies and fractural facies of the 1st Member of Liushagang Formation in Yongan Region,Fushan Oilfield,four types of petrophysical facies were established,including favorable facies-intergranular unstable components dissolution,favorable facies-intragranular unstable component dissolution,unfavorable facies-unstable component dissolution and unfavorable facies-authingenic mineral density diagenetic facies.Each petrophysical facies classification has its unique porosity-permeability relationship and different rock-electro parameters.Therefore,the petrophysical modeling and saturation modeling are established based on the analysis of petrophysical facies,by which the interpretation accuracy significantly improved and the problem of low interpretation coincidence rate from the rapidly lateral changes of reservoirs is well solved.