Study on Facies Modeling of Tight Sandstone Reservoir Using Multi-Point Geostatistics Method Based on 2D Training Image—Case Study of Longdong Area, Ordos Basin, China

The Longdong area in the Ordos basin is a typical fluvial reservoir with strong heterogeneity. In order to clarify distribution law of underground reservoirs area, it necessary establish and optimize 3D geological model characterize heterogeneity reservoirs. This great significance for accelerating exploitation tight sandstone gas southwest basin. study takes P2h8 member Ct3 research as an example, analyzes core logging curve shape divide sedimentary microfacies, establishes facies model. particular, view difficulty obtaining training images under existing conditions we use multi-point geostatistics method combining sequential two-dimensional condition simulation direct sampling can simulate by using 2D composed digital plane diagrams well-connection diagrams. addition, choose object-based indicator comparative experiments verify feasibility this (sequential combined method) from many aspects. results show that based on not only match well data, but also geometric characteristics contact relationship object. sandbody thickness modeling are consistent actual area. explores large-scale Additionally, provides new idea scheme geologists similar environments.