影响AFF公式中参数T_(ma)和m的地层因素探讨  

Formation Factors Influencing Parameters T_(ma) and m in Acoustic Formation Factor (AFF) Formula

作　　者：刘国民[1] 张鲁惠[2] 董德进[1] 汤兴旺[1] 

机构地区：[1]中原油田分公司勘探开发科学研究院,河南濮阳457001 [2]中原油田分公司采油一厂,河南濮阳457005

出　　处：《江汉石油学院学报》2003年第4期58-60,共3页Journal of Jianghan Petroleum Institute

摘　　要：描述储层有效孔隙度(φ)与声波时差(T)间关系的声波地层因素公式(Acoustic Formation Factor或简称为AFF公式)中参数Tma和m的可靠性决定着用AFF公式计算储层φ值的精确性和可靠程度,通过对大量岩心化验分析资料与对应层位声波时差间关系的研究,探讨了影响参数Tma和m的地层因素——地层孔隙中流体的性质、地层压力系数、岩石颗粒粒度中值和分选系数。并建立了砂岩储层计算参数Tma和m的经验公式,使AFF公式能更客观准确地描述储层φ与T间的变化关系,进而大大提高了运用声波地层因素公式计算储层φ值的精度。AFF of the relationships between reservoir effective porosity () and interval transit time (T) is described, in which the reliability of parameters Tma and m determines the precision and reliability of value calculating with AFF. Through studying large number of core chemical analysis data and relationships between interval transit time of corresponding horizons, the fluid property, formation pressure coefficient, rock median size and sorting coefficient of formation factors-formation permeability influencing parameters Tma and m are discussed. An empirical equation of sandstone reservoir calculating parameters Tma and m is established, thus the variation relationships between and T could be described more objectively and accurately with AFF, by which the precision of calculating by using AFF is raised greatly.

关 键 词：声波地层因素公式 流体性质 压力系数 粒度中值 分选系数 

分 类 号：P539[天文地球—古生物学与地层学]