Effective medium modeling: How to efficiently infer porosity from seismic data?

摘要: Many geophysical studies in reservoir characterization focus on the variations elastic properties of rocks. They commonly involve seismic data, which are processed terms attributes. These data still have to be related physical rock mass and fluids saturating pore space. This need motivated development research projects based upon effective medium theory (EMT). We used EMT infer porosity also fracture from impedances part Fort Worth Basin, Texas. The main idea was take advantage available characterize equant pores cracks. then focused volume fraction spherical crack density. Shortly thereafter, we developed an (EM) model that provided numerical responses for impedances. were compared obtained stratigraphic inversion. overall procedure consisted adjusting input parameters model, density, minimize impedance mismatch. Our case study involved two limestone formations Basin (the Marble Falls Ellenburger Formations) one shaly formation Barnett Shale). results promising — turns out a very useful tool explain microstructural properties, particular, fractured reservoirs.