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《Fault-Block Oil & Gas Field》 2010-06
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Study on parametric modeling of ultra-low permeability reservoir with petrophysical facies classification

Song Ziqi Yang Honggang Sun Ying Jing Cheng Cheng Guojian He Yufei Zhang Liang(MOE Engineering Research Center of Development & Management of Western Low & Ultra-Low Permeability Oilfield,Xi′an Shiyou University,Xi′an 710065,China)  
The ultra-low permeability reservoir in the middle part of central Shanbei slope is influenced by sedimentary environment,diagenesis and structure.And it has a large difference between reservoir capability and flow structure.The reservior is characterized by heterogeneity,nonlinearity distribution and complicated log response.So petrophysical facies classification can be used for the modeling of reservoir parameters in ultra-low permeability reservoir in order to determine the various information,division method and classification modeling of evaluating petrophysical facies of reservoir.The interpretation models of different types of log parameters which are corresponding to different reservoir petrophysical facies can be established by the use of logging,core and test data in Chang 6 reservoir of Yanhewan Area,Ansai Oilfield.By the data points fitting of calibrated log interpretation model of classification core,it improves the uniformity and linearity during the fitting of permeability or other complex relationships.It overcomes the characteristics of low signal to noise ratio and low resolution which exist in the low permeability reservoirs and provides an effective method to accurately establish the model of ultra-low permeability reservoir parameters.
【Fund】: 国家自然科学基金项目“基于核向量机的油藏历史拟合代理模型研究”(40872087);; 中国石油天然气股份有限公司科技攻关项目“致密气藏测井采集处理与储层评价技术研究”资助
【CateGory Index】: P618.13
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