Numerical Simulation of Crossed-Linked Polymer Injection in DinaCretaceous Field:A Real Field Case Study

摘要

The main objective of this work is to shed light on the mechanism of modeling crossed-linked polymer(CLP)technology,by incorporating real field pilot injection and production data in the Dina Cretaceous fieldlocated in the Upper Magdalena Valley(UMV)Basin in Colombia.The paper will highlight why originalsimulation model predictions differ from the actual observed field data and the predictability of numericalsimulation of CEOR process would be discussed and presented.Despite successful application and positivefield results in the literature,the propagation of CLP system in porous media has been challenged withconflicting opinions and reports and still remains debatable and uncertain.This paper will use recent experimental laboratory data in conjunction with actual field data to properlyexplain the possible mechanism of CLP and offer practical modeling techniques to capture experimental andfield data.Therefore a modeling methodology was developed and used to model the field data,this methodis based on previous modeling mechanisms with incorporating a new grid-based residual resistance factor(RRF)and pore throat sizes.The model requires a proper understanding of rock typing and populate thepermeability distribution based on pore throat sizes.The new modeling mechanism was able to reasonablypredict the pilot performance in some of the offset producers.To model delayed viscosification and adsorption of the CLP process,two approaches has been evaluatedand used in the original simulation model,the use of multiple regions and chemical reaction.The chemicalreaction rate is tuned to calibrate laboratory data and to model the delayed viscosification and RRF.Howeverrecent laboratory experiments explained the possible mechanisms of CLP formation through intra-molecularcrosslinking and intra-inter-molecular crosslinking.In conclusion,because of extensive and numerous laboratory experiments and the conduct of field pilotresults,proposed numerical modeling demonstrate the complexity of modeling the CLP system and offersa practical solution to the field applications.