基于岩石物理相的酸性火山岩储层渗透率解释模型研究

Permeability Interpretation Model of Acid Volcanic Reservoirs Based on Petrophysical Facies

渗透率是评价油气储层的主要参数之一,针对松辽盆地徐深气田酸性火山岩储层存在岩性复杂、孔隙类型多样、非均质性强的特点,应用单一的孔隙度-渗透率关系模型计算渗透率精度低,不能满足储层评价及开发需要。综合应用岩心资料、常规测井与成像测井资料,基于岩石物理相建立了火山岩储层渗透率解释模型,其精度明显高于常规方法建立的渗透率解释模型,经计算得到的渗透率与岩心分析数据符合较好。通过实际资料处理结果表明,基于岩石物理相建立的火山岩储层渗透率计算方法,有效提高了渗透率解释精度,为储层评价开发提供了比较准确的渗透率参数。

Permeability was one of the major parameters for evaluating reservoirs.Because thelithology and pore types were complex,heterogeneity was very strong in Xushen Gas Field of Songliao Basin,the permeability accuracy obtained by using the single porosity-permeabilitymodel was lower,it could not satisfy the needs of reservoir evaluation and development.Based on thesimilar reservoir classification,the permeability interpretation model of volcanic reservoirs wasestablished by comprehensively using core data,conventional and image logging data.Accuracy of themodel was higher than that of common permeability interpretation model,the permeabilitycalculated by using the model was consistent with that of core analysis.The application result showsthat the permeability interpretation model based on similar reservoir classification improves theaccuracy and provides the accurate permeability parameters for reservoir evaluation and development.