# Inflow performance relationship calculator app

### Vogel's inflow performance relationship - Production Technology

PDF | Background: The Inflow Performance Relationship (IPR) Results & Conclusion: The results showed the high application [1] H.H. Evinger, and M. Muskat, "Calculation of Theoretical Productivity Factors", Trans. Well Inflow Performance represents the relationship between pressure and flow rate at the well face of an individual well. This allows re-perforation studies, analysis of skin, the application of sand control Alongside all of the analytically derived Inflow Performance Relationships Users can also take advantage of a hybrid thermal calculation technique that was .

The average reservoir pressure for this example is 1, psia. Table 1 Solution To apply the IPR methods, obtain test information, which includes production rates, flowing bottomhole pressures, and an estimate of the average reservoir pressure. The data obtained at the largest pressure drawdown can be used with Eq. This value is then used to estimate the production rate at other values of flowing bottomhole pressures to develop a complete inflow performance curve.

## Vogel’s inflow performance relationship

Table 2 shows the test data prepared for plotting. The data are plotted on a logarithmic graph, which is used to estimate the slope of the best-fit straight line through the data.

The deliverability exponent n is the inverse of the slope. Once n is determined, Eq. To apply the method of Jones, Blount, and Glaze to this data set, Table 3 was prepared and the data plotted on a coordinate graph as shown in Fig.

The best-fit straight line yielded a slope of 0. The intercept is the laminar flow coefficient and is determined to be 0.

These values are used in Eq. From this example, each of the three methods yielded different values for the maximum oil production rate as well as the production rate at a flowing bottomhole pressure of psia.

As a result, production estimates will be dependent on the IPR used in the analysis, and the petroleum engineer should be aware of this concern in any analysis undertaken.

In applying the composite IPR, the appropriate relationship must be used to estimate J because it depends on the flowing bottomhole pressure of the test point. The inflow performance curve will be developed by adding the estimated oil rates to the water rates to create a total liquid rate. Future performance methods Once the petroleum engineer has estimated the current productive capacity of a well, it is often desired to predict future performance for planning purposes. Standing [11] was one of the first to address the prediction of future well performance from IPRs.

Unfortunately, his relationship requires knowledge of fluid properties and relative permeability behavior. He proposed that the future maximum oil production rate could be estimated from the current maximum production rate with The exponent n in Eq. This method requires no more information to apply than that obtained for applying the various IPRs. Uhri and Blount [12] and Kelkar and Cox [13] have also proposed future performance methods for two-phase flow that require rate and pressure data at two average reservoir pressures.

### Well Inflow Performance - Production Technology

At the time Wiggins [9] proposed his three-phase IPRs, he also presented future performance relationships for the oil and water phases. Multilateral Completions Alongside all of the analytically derived Inflow Performance Relationships available in PROSPER, the Multi-Lateral IPR model is the culmination of extensive research and has been designed specifically for complex well completions that have undulating trajectories across multiple producing zones.

This allows for assessing the productivity of oil, gas and condensate wells to be performed, both for production and injection scenarios, with or without artificial lift. Sensitivities can be conducted through a simple interface that allows the investigation of virtually all parameters that are inputs to the models and the matching workflows allow for comparisons to be done between the results predicted by the models and the measurements obtained for these wells if they are already operational.

Thermal Modelling PROSPER is capable of modelling thermal profiles in wellbores using multiple methods, ranging from a constant rate of heat transfer Rough Approximation through to a detailed and rigorous full energy balance Enthalpy Balance that considers the forced and free convection, conduction and radiation heat transfer mechanisms.

The latter considers a detailed materials specification, and to aid with this PROSPER has been furnished with a database of common casing, tubing, cement and mud descriptions with their associated heat transfer properties. Users can also take advantage of a hybrid thermal calculation technique that was developed by Petex Improved Approximation.

This allows for Joules-Thomson effects to be captured in the well, while at the same time enabling multiple heat transfer coefficients with depth to be used. Flow Assurance Flow assurance studies are an integral part of any pipeline and well analysis, done both for designing and troubleshooting purposes.

In PROSPER many years of research have been dedicated to addressing these issues and users can study either hydraulic flow assurance challenges, or issues related to the thermodynamic behaviour of fluids. Hydraulic investigations can be conducted on flow regimes, erosional velocities, superficial velocities, wellbore stability analysis liquid loadingslug catcher sizing and many others.

Thermodynamic calculations can include studies on hydrate formation, waxing, salt precipitation and others. PROSPER will indicate where in the system these issues might occur and the user has options to consider intervention e. Fully Compositional As is the case with all the programs developed by Petex, PROSPER uses a powerful thermodynamics engine to complement the traditional black oil models that provide all the thermodynamic properties needed for the pressure drop, flow assurance and inflow calculations.

In fully compositional mode, PROSPER allows users to take advantage of advanced hydrate prediction and mitigation calculations, salt deposition, special handling of CO2 for dense and light phases and many other functionalities. In black oil mode, a large number of correlations are available that can be compared and matched to lab data.

Special correlations for heavy oils have been implemented and these, coupled with an emulsion model as well as special heavy oil pressure drop models, make PROSPER unique in being able to deal with such fluids and the intricacies of producing them.

Another feature that is widely used is the ability to predict the vaporised water that is produced from gas wells. This is based on industry standard calculations that have been modified based on data received from clients to create a uniquely accurate model for analysing this situation. Artifical Lift Systemsechnical Artificial lift design and troubleshooting has been an area where PROSPER has offered unparalleled modelling capabilities to the user community for many years. With every new release of the program, one or more methods are added and the capability of the existing methods are enhanced.

• Well Inflow Performance
• Oil well performance

A database of equipment Pumps, valves, motors etc is available and is being updated every year as new descriptions become available.