The Application of Simplified Model for Post-Acid Fracturing WellPerformance Analysis by using Grid Virtual Connection in the NumericalSimulator

摘要

There are several methodologies to model post-acid fracturing well performance such as implementingnegative skin factor and stimulated reservoir volume local grid refinement (SRV LGR). However, the firstmethod is too simplified to be applied in numerical simulation and the second method is too complex andtime consuming. Therefore, to bridge the two methods, this paper will discuss the application of a gridvirtual connection to model the well performance of acid fractured wells. Grid virtual connection is the planar of fracture that alters the deliverability of the penetrated grid. Inthis study, series of analyses are performed, such as: (i) Data input quality check (QC) and validation(reservoir model and fracture model); (ii) Simulation running using the skin factor method, SRV LGR, andgrid virtual connection; (iii) Comparison between the three methods regarding the streamline result andsimulation running time; (iv) Model calibration (history matching) using post-fracturing data; (v) QC theresult of history matching. Post-fracturing production data from two wells (X-6 & X-8) are used as thecalibration point. From these analyses, the advantages and limitations of the virtual connection method willbe examined.