一种计算岩石基质压缩系数的方法

发布时间：2019-06-14 18:29

【摘要】：建立储层物性、含流体性与弹性参数之间的关系是储层预测与烃类检测的基础。在利用Biot-Gassmann方程研究含不同流体岩石弹性性质时,岩石基质压缩系数的快速、准确求取非常关键。基于一个合理的假设,利用Biot-Gassmann方程推导出了一种计算岩石基质压缩系数的方法,并用干燥、水饱和并且取芯来自同一砂岩层的致密砂岩的高、低频实验数据对本方法的正确性进行验证。结果表明,岩石具有一致的岩石基质压缩系数,该方法有效可靠。受岩石微观孔隙结构和亲水矿物的影响,在不同频率或饱和流体状态下求取的岩石基质压缩系数存在较小差异,在应用过程中需对频率和孔隙流体的影响进行适当考虑。
[Abstract]:The relationship between reservoir physical properties, fluid content and elastic parameters is the basis of reservoir prediction and hydrocarbon detection. When the Biot-Gassmann equation is used to study the elastic properties of rocks with different fluids, it is very important to calculate the compression coefficient of rock matrix quickly and accurately. Based on a reasonable assumption, a method for calculating the compression coefficient of rock matrix is derived by using Biot-Gassmann equation, and the correctness of this method is verified by the high and low frequency experimental data of dry, water saturated and cored tight sandstone from the same sandstone layer. The results show that the rock has the same compression coefficient of rock matrix, and the method is effective and reliable. Due to the influence of rock micropore structure and hydrophilic minerals, the compression coefficient of rock matrix obtained under different frequencies or saturated fluid conditions is slightly different, and the influence of frequency and pore fluid should be given due consideration in the process of application.
【作者单位】：中国石油勘探开发研究院;中国石油大学(北京)地球物理与信息工程学院;
【基金】：国家科技重大专项(2016ZX05046-002)
【分类号】：P618.13

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