Study On Fine 3D Geological Modeling And Advantageous Channels In G Fault Block Reservoirs

Since the production of the fault block G,it has entered the stage of extra-high water cut and high recovery.The problems in the development are mainly the strong heterogeneity of the reservoir,the prominent contradictions between the layers,the unbalanced vertical use,and the single-layer water injection.Sudden progress is serious;conventional methods of governance are difficult to improve the mobilization of layers;the laws of movement of underground oil and water are complex,and the remaining oil distribution is difficult to predict.The main purpose of this dissertation is to study the fine three-dimensional geological modeling and identification of the dominant channel for the G fault block reservoir.By studying the characteristics of G fault block reservoirs from four aspects of lithology,reservoir space,pore infiltration distribution,and reservoir heterogeneity,the lithology of the area is mainly classified as feldspar and rock debris.The circularity is good,and the physical properties of the Jujube II and III oil groups in the target interval are relatively good,with mesopore to medium-low permeability,and some mesopores to hyperosmotic.The porosity is mainly concentrated between 15 and 25%.The average porosity 18.8%,average permeability is 243.7×10-3?m2,reservoir heterogeneity is relatively strong,reservoir characteristics of comprehensive G fault-block reservoirs and basic data required for geological modeling,using Petrel modeling software to establish compliance A fine three-dimensional structural model of the actual structural characteristics of the area was studied.Based on the structural model,a reasonable modelling method was used to establish the petrographic model.Under the constraint of the petrographic model,an attribute parameter model of porosity,permeability and oil saturation was established.After the establishment,the accuracy of the model is verified through the calculation of reserves.By analyzing the dominant channel identification methods so far,this paper selects a combination of dynamic and static methods to identify the development of dominant channels in the G-fault block reservoirs.The Rdos simulation analysis system is used to perform oil and water based on the refined 3D geological model of the study area.Three-dimensional flow simulations were used to identify the development of dominant channels in the G-faulted reservoirs,and compared with the tracer monitoring results to verify its accuracy.Finally,it was concluded that the dominant channel of the G-faulted oil reservoirs was mainly developed in the 115 oil of the ? oil group.Layers ?2 and ?3 of the ? oil group,the development of dominant channels is more serious,and most of them are class 1 dominant channels.