Pore morphology effect on elastic and fluid flow properties in Bakken formation using rock physics modeling

Abstract Unconventional geo-resources are critical due to their important contributions energy production. In this transition and sustainability era, there is an increased focus on CO 2 -enhanced oil recovery (CO -EOR) geological storage (GCS) in unconventional hydrocarbon reservoirs, the extraction of hot fluid for through enhanced geothermal systems. However, these solutions can only be achieved efficient stimulation develop a complex fracture network pore structure host rocks extract heat hydrocarbon, or storage. Using Bakken formation well data rock physics models, study aimed identify post-depositional effect seismic velocity, elastic moduli, fluid; further predict best lithofacies interval landing, implications (gas, oil, water) naturally- often systematically-fractured geosystems. The KT DEM models' predictions show distinct intervals exhibiting needle-like pores having higher velocities ( V p s ) moduli K µ ), relative other that exhibit moldic pores. At same concentration, (small aspect ratios) have impact , than spherical with all parameters held constant. affected more by properties saturating being greater when it water-saturated gas-saturated. reverse behavior, gas-saturated case case. Further, analyses suggest middle will susceptibility fracturing faulting, hence achieve (oil recovery. Our findings provide insights relevant production geo-storage reservoirs. Article highlights Integrated log models. Investigated changes flow shale. Increase porosity causes reduction velocities. geometry depending density fluid. Lithofacies needle−like susceptible intragranular