摘要
基于弹性模量定量地计算地层的含气饱和度,可以提高利用测井资料对储集层进行评价的能力。由阵列偶极子声波测井得到的纵波、横波速度信息可以计算出岩石弹性模量参数。根据Gassmann方程所描述的低频情况下饱和流体岩石的体积模量和剪切模量间的关系,建立了含气饱和度与地层含气、100%含水和干岩石情况下体积模量、剪切模量的关系方程,进而得到基于地层弹性模量的含气饱和度计算模型。基于该含气饱和度计算模型中各个参数的计算方法和计算流程,编制了处理模块并对现场资料进行了处理解释,其结果与配套的试油和气测资料具有很好的一致性,说明是一种提高含气储集层解释精度的有效方法。
The quantitative determination of gas saturation based on elastic modulus can improve the ability of reservoir evaluation from well logging. Once the velocities of compression and shear waves are obtained from dipole acoustic-array logging data, the elastic moduli can be determined. According to Gassmann equation which describes the relationship between bulk modulus and shear modulus in a low frequency situation, an equation is established between the gas saturation and bulk modulus as well as shear modulus in the cases of gas saturated, water saturated and dry clay separately, from which the model of calculating gas saturation based on acoustic modulus is derived and a software is developed. The good result of in situ data process and interpretation with the aid of the software is verified by the oil test and mud logging data.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2007年第5期598-602,共5页
Petroleum Exploration and Development
基金
中国石油勘探开发研究院科研项目"阵列声波测井的处理方法及应用研究"(000210040002)
关键词
偶极子
阵列声波测井
含气饱和度
定量评价
弹性模量
dipole
acoustic-array logging
gas saturation
quantitative evaluation
elastic modulus
