OPTIMAL PRODUCTION STRATEGIES

The production optimization of oil and gas wells using computerized well model has becomeasuccessful technique contributing towards the better efficiency and higher production of manywells. This study focuses on designing optimum production strategies in mature oil field, well modelling using prosper, one of the components of the integrated production modelling (IPM) was implemented in field X which is located in peninsular Malaysia. The model carries all theproperties of the well with detailed description of the reservoir and vertical lift performance. The process includes four phases: first phase was building well model using PVT, IPR, surfaceand equipment data. Second phase was constructing well matching based on the monthlywell test data. This helps to ensure that the model is well calibrated. Third phase was performingwell analysis based on the well matching results. Well analysis can be performed by evaluatingeachcomponent of the producing well. Often this procedure will identify possible problems occurredin the production components which restrict flow and cause the well to produce in a manner that the maximum potential rate is not achieved. From the results and findings achieved fromtheIPR-VLP curves/trend, the optimum operating point takes place at a flow rate of 900STB/Dat Bottom hole pressure of 2500psia, so increasing tubing size beyond 3.96-inches offers minimal benefits and can lead to liquid loading issues. Also, maintaining a moderate wellhead pressureof350psig achieves a stable production and prevents drawdown. Also, from my findings, the IPR- VLP intersection in the graphical trend above shows the natural equilibriumof the system, satisfying the certainty and accuracy of prosper modeling software tool. Overall, this productiontechnique permits engineer to come with some modification which is expected to increase theproduction.