| 许孝凯,刘美杰,朱留方,张晋言,翟勇.基于岩石物理的致密气层识别方法研究[J].,2016,35(2):116-121 |
| 基于岩石物理的致密气层识别方法研究 |
| Tight gas reservoir recognition method based on rock physics model |
| 投稿时间：2015-06-26 修订日期：2016-02-23 |
| 中文摘要: |
| 致密储层声波性质受骨架矿物组成及孔隙类型影响较大,为更准确进行气层识别,本文给出了一种利用纵横波速度信息进行致密气层识别的方法：其首先利用Voigt-Reuss-Hill平均模型,求取岩石骨架等效弹性模量,消除岩性影响；利用Xu-White模型和岩石剪切模量计算孔隙纵横比,消除孔隙性质影响；利用Xu-White模型计算干燥岩石弹性模量,得到不受孔隙流体性质影响的弹性模量；将实测岩石弹性模量减去干燥岩石弹性模量定义为含气性因子,进行气层识别。本方法与传统的利用纵横波速度比分析储层含气性等方法相比,考虑因素更全面,为具有复杂岩性和低孔低渗等特征的致密岩石气层识别提供技术支持。 |
| 英文摘要: |
| Taking into consideration the effect of lithology and porosity, a tight gas reservoir recognition method using both compressional wave and shear wave velocity is presented: First, Voigt-Reuss-Hill Model is used to calculate the equivalent elastic modulus in order to eliminate the effect of lithology; Second, Xu-White Model is taken to get aspect ratio of pore; Then, the elastic modulus of dry rock which is not affected by pore fluid is got; At last, a gas reservoir recognition factor which is defined by the difference between the actual elastic modulus and dry rock elastic modulus is computed. Compared with the traditional methods for gas reservoir recognition, the new method is more completely and more suitable for the tight gas reservoir whose porosity and permeability is and lithology is complex. The example of its application shows the validity of this method. |
| DOI：10.11684/j.issn.1000-310X.2016.02.004 |
| 中文关键词: 致密气,Xu-White模型,岩石物理,复杂矿物,复杂孔隙类型 |
| 英文关键词: Tight gas, Xu-White model, Rock physics, Complex mineral, Complex pore type |
| 基金项目: |
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