摘要
高温高压条件下测量的岩石纵波速度对于储层评价具有重要作用,但该条件下岩石声波速度的测量要比常温常压条件下复杂的多,而高温高压和常温常压条件下的岩石纵波速度的关系,受到孔隙度和孔隙结构等因素的影响.为了研究温度和压力对岩石纵波速度的作用及影响因素,测量了随压力和温度变化的致密砂岩纵波速度,得到了压力和温度对纵波速度的影响系数,建立了影响系数与孔隙度及表征孔隙结构特征的核磁参数之间的关系,从而获得了不同样品的纵波速度与压力和温度的关系.基于该关系对储层的纵波速度进行计算,并与测井数据进行对比,计算结果与测井数据有很好的一致性,说明本文建立的关系是有效的.因此基于本文的研究,可以根据常温常压下的纵波速度计算高温高压条件纵波速度,这为常规条件测量纵波速度的应用提供了支持.
P-wave velocity on reservoir condition has an important effect on reservoir evaluation.However,measurement of velocity on reservoir condition is much more complicated than that at ambient temperature and atmospheric pressure.Although velocity on reservoir condition is closely related to that on normal condition,the effect coefficient is affected by porosity,pore structure and other factors.To study these factors,the P-wave velocity of tight sandstones with the changes in pressure and temperature was measured.The influence coefficients of pressure and temperature were obtained by building the relationship between velocity of each sample and pressure and temperature.Taking porosity and pore structure into account,the relationship between influence coefficients,porosity and NMR parameters was built to obtain the unified relationship between velocity,pressure and temperature.P-wave velocity on different condition was calculated by the relationship.And it shows that the results match well with logging data.Based on our study,we can calculate the P-wave velocity on reservoir conditions using the data under normal condition.Our study provide support on application of experimental data under normal condition.
作者
房春慧
李继龙
姜纪沂
黄骥超
石砚斌
FANG Chun-hui;LI Ji-long;JIANG Ji-yi;HUANG Ji-chao;SHI Yan-bin(China Institute of Disaster Prevention,Sanhe 065201,China;Hebei Key Laboratory of Earthquake Dynamics,Sanhe 065201,China;Institute of Engineering Mechanics,Harbin 150080,China)
出处
《地球物理学进展》
CSCD
北大核心
2020年第5期1770-1776,共7页
Progress in Geophysics
基金
中央高校基本科研业务费项目(ZY20200201)
自然资源部中国地质调查局地质调查项目(DD20190261)
自然资源部中国地质调查局地质调查项目(DD20190354)联合资助.
关键词
纵波速度
压力
温度
实验研究
致密砂岩
P-wave velocity
Pressure
Temperature
Experimental research
Pore structure
