油气地质与采收率2017，Vol.24Issue(3)：10-17,8.
基于压汞资料的碳酸盐岩储层渗透率预测模型——以扎纳若尔油田KT-Ⅰ和KT-Ⅱ含油层系灰岩储层为例
Permeability prediction model of carbonate reservoir based on mercury injection data: A case study of oil-bearing limestone reservoir in KT-Ⅰ and KT-Ⅱ members of Zahnanor oilfield
摘要
Abstract
Based on capillary pressure curve and experimental measurement data of porosity and permeability of 82 carbonate rocks of Zahnanor oilfield in Caspian Seashore Basin,Kazakhstan,comparison analysis of permeability prediction accuracy of carbonate reservoir was made through comparing and analyzing Swanson model,Capillary-Parachor model,Winland model,Pittman model,Nelson model and the δ function model.The results show that the calculation accuracy of the six permeability prediction models is poor for permeability prediction of complicated pore structure carbonate reservoir.But the effect of Swanson model is better than those of the other five models.Further analysis on the applicability of permeability prediction of carbonate reservoir based on Swanson model suggestes that the Swanson model cannot reflect the influences of microfracture and complex pore throat distribution on permeability.For carbonate rock sample,the pore throat,the distribution of which is characterized by multimodal feature,contributes to reservoir permeability,and there is no dominant pore throat size in the core sample.On the contrary,the Swanson model believes that the pore throat radius corresponding to the inflexion point of capillary pressure curve is the dominant pore throat size of core sample.And the Swanson model ignores the influence of small pore throat on permeability of rock sample which has a bimodal pore throat distribution.Therefore,the error of permeability calculated by Swanson model is obvious.Based on Swanson model,we put forward an improved permeability prediction model considering the influence of pore structure parameters such as porosity,skewness and sorting coefficient.It is found that the permeability prediction accuracy of the improved permeability prediction model for complex pore structure carbonate reservoir is obviously enhanced through comparing it with the Swanson model.关键词
碳酸盐岩/压汞Swanson模型/孔喉半径分布/歪度/分选系数/渗透率Key words
carbonate rock/mercury injection/Swanson model/pore-throat distribution/skewness/sorting coefficient/permeability分类
能源科技引用本文复制引用
程媛,张冲,陈雨龙,朱林奇,郭聪..基于压汞资料的碳酸盐岩储层渗透率预测模型——以扎纳若尔油田KT-Ⅰ和KT-Ⅱ含油层系灰岩储层为例[J].油气地质与采收率,2017,24(3):10-17,8.基金项目
国家自然科学基金项目“致密气储层岩石导电机理研究及饱和度评价”(41404084),湖北省自然科学基金项目“基于等效岩石单元模型的渗透率测井评价方法研究”(2013CFB396),油气资源与勘探技术教育部重点实验室(长江大学)开放基金项目“基于成岩相相控的致密砂岩储层饱和度建模及测井评价”(K2016-09). （41404084）
