Based on a large quantity of laboratory ultrasonic measurement data of sedimentary rocks and using Monte Carlo simulation and Backus averaging, the layering effects on seismic anisotropy are analyzed. The layering effects are studied for different types of rocks under different saturation conditions. If the sedimentary strata consist of only isotropic sedimentary layers and are brine saturated, the d value for the effective transversely isotropic (TI) medium is usually negative. However, the d value will increase for gas bearing strata. Based on simulation results, can almost perfectly be determined by other TI elastic constants for a layered medium consisting of isotropic layers. Therefore, d can be predicted from the other Thomsen parameters with confidence. The anisotropic properties of the interbedding system of shales and isotropic sedimentary rocks are primarily controlled by the intrinsic anisotropy of shales. There are fair correlations among the Thomson anisotropy parameters.
Presentation Date: Wednesday, October 19, 2016
Start Time: 8:50:00 AM
Location: Lobby D/C
Presentation Type: POSTER