摘要：We have studied the reflection dispersion signatures of a heterogeneously patchy saturated reservoir exhibiting attenuation and velocity dispersion in a seismic range of frequency. A modified patchy saturation model is employed to predict velocity dispersion and intrinsic attenuation behaviour associated with wave-induced pressure diffusion due to the presence of both mesoscopic and microscopic heterogeneities. Understanding the combined effects of microscopic squirt flow and wave-induced fluid flow related to mesoscopic heterogeneities on wave attenuation and associated dispersion would be important for determining the relative contribution of both of the interdependent energy loss mechanisms. The acoustic properties from the modified patchy saturation model were then employed in combination with an approximate expression for the frequency-dependent normal-incidence reflection coefficient of a dispersive reservoir rock, to give insights into the impacts of attenuation (and its associated velocity dispersion) and acoustic impedance contrast on the reflection dispersion characteristics. Analysis of the results indicates that the dispersion attribute of reflection coefficients and the associated cross-plot are more sensitive to fluid saturation and porosity than the magnitude of the reflection coefficient, and hence provide a promising approach to characterise fluid saturation and porosity in heterogeneous hydrocarbon reservoirs.

关键字：Attenuation and dispersion patchy saturation mesoscopic and microscopic heterogeneity frequency-dependent reflectivity fluid saturation

ISSN号：0812-3985

卷、期、页：卷: 50 期: 5 页: 541-553

发表日期：2019-09-03

影响因子：1.027000

期刊分区（SCI为中科院分区）：四区

收录情况：SCIE（科学引文索引网络版）,ESI（基本科学指标数据库）,EI（工程索引）

发表期刊名称：Exploration Geophysics

通讯作者：吴新豫

第一作者：贺艳晓,王尚旭

论文类型：期刊论文

论文概要：贺艳晓,吴新豫,王尚旭，Reflection dispersion signatures due to wave-induced pressure diffusion in heterogeneous poroelastic media，Exploration Geophysics，2019，卷: 50 期: 5 页: 541-553

论文题目：Reflection dispersion signatures due to wave-induced pressure diffusion in heterogeneous poroelastic media