摘要：To study the influence of pore fluid on the seismic wave velocity in sandstones with different permeability, we obtain a seismic wave velocities at seismic frequencies with strain amplitudes <10^-6and at ultrasound (~1 MHz) frequencies with a multi-frequency band elastic parameter measurement system; meanwhile, we get the acoustic properties of dry and fully water saturated sandstones using the differential acoustic resonance spectroscopy. Results show that no obvious dispersion in tight gas sandstone is observed at seismic and ultrasound frequencies at low saturations; whereas compressional velocity dispersion becomes apparent at high saturations. From dry to fully water saturation, the bulk modulus of the tight sandstones measured with different frequency decrease with higher porosity of the samples, the bulk modulus increment are greatly influenced by microscopic pore structure. No obvious dispersion in sandstone with high porosity and permeability both at low and high water saturation, and the influence of confining pressure on the compressional and shear wave velocity is greater than the frequency at seismic frequency band. The difference of the velocity dispersion of the sandstones with high porosity and permeability and tight gas sandstones can be used in the Technique for reservoir prediction and direct oil-gas detection, meanwhile, this study can help to better understand the viscoelastic behavior of rocks, promote the development of frequency dispersion theory, and improve the accuracy of seismic interpretation.
©, 2015, Science Press. All right reserved.

ISSN号：0001-5733

卷、期、页：v 58,n 9,p3380-3388

发表日期：2015-09-01

影响因子：0.000000

收录情况：EI（工程索引）

发表期刊名称：Acta Geophysica Sinica

参与作者：Deng, Ji-Xin

通讯作者：未晛

第一作者：王尚旭,赵建国,唐跟阳

论文类型：期刊论文

论文概要：未晛,王尚旭,赵建国,唐跟阳,Deng, Ji-Xin，Laboratory study of velocity dispersion of the seismic wave in fluid-saturated sandstones，Acta Geophysica Sinica，2015，v 58,n 9,p3380-3388

论文题目：Laboratory study of velocity dispersion of the seismic wave in fluid-saturated sandstones