## What is the inflow performance relationship describes?

The Inflow Performance Relationship (IPR) describes the behavior of flow rate with flowing pressure, which is an important tool in understanding the well productivity. Different correlations to model this behavior can be classified into empirically-derived and analytically-derived correlations.

### What are effects on the inflow performance?

Inflow performance of a reservoir is defined as the functional relationship between the flowing bottom-hole and the resulting flow rate. It is the rate at which fluid will flow towards the wellbore and depends on the viscosity of the fluid, the permeability of the rock, and the driving force.

#### What is outflow performance relationship?

Vertical Lift Performance Relationship (VLP), named also Outflow, describes the bottom-hole pressure as a function of flow rate. The VLP depends on many factors including fluid PVT properties, well depth, tubing size, surface pressure, water cut and GOR.

**What is IPR in oil and gas?**

Inflow Performance Relationship (IPR) of a well is the relation between the production rate and flowing bottom hole pressure. For oil wells, it is frequently assumed that fluid inflow rate is proportional to the difference between reservoir pressure and wellbore pressure.

**What is a VLP curve?**

Vertical Lift Performance curve is a relationship between the flow rate and the pressure. VLP curve shows how much pressure required to lift a certain amount of fluid to the surface at the given well head pressure.

## What is flow efficiency of a well?

A better relative index for determining the efficiency with which a well has been drilled and completed is the “flow efficiency,” the ratio of a well’s actual PI to ideal PI.

### What is vertical lift performance?

#### What is well inflow?

Well Inflow Performance represents the relationship between pressure and flow rate at the well face of an individual well. The scientist Darcy was the first studied extensively the relationship between pressure and flow rate.

**What is VLP in production?**

**What is IPR and VLP?**

Both the Inflow Performance Relationship and the Vertical Lift Performance Relationship relate the wellbore flowing pressure to the surface production rate. While the IPR represents what the reservoir can deliver to the bottom hole, the VLP represents what the well can deliver to the surface.

## How do you develop an inflow performance curve?

The inflow performance curve will be developed by adding the estimated oil rates to the water rates to create a total liquid rate. Once the petroleum engineer has estimated the current productive capacity of a well, it is often desired to predict future performance for planning purposes.

### What is a gas well inflow performance curve?

The inflow performance curve is a plot of bottomhole pressure vs. production rate for a particular well determined from the gas well deliverability equations. Fig. 1.2 depicts a typical gas well inflow performance curve.

#### What is the relationship between the inflow and outflow pressure curve?

The new inflow and outflow pressure relationships are for the outflow curve. Table 1.12 shows the pressure-rate relationship for both the inflow and outflow curves. Because the wellhead is the node in this analysis, the outflow curve will be constant and equal to the anticipated flowing wellhead pressure.

**What is inflow performance relationship (IPR)?**

Inflow Performance Relationship is a curve of producing rates plotted against well bottomhole pressures for oil, water and gas wells. IPR curve shows productive capacity and well performance. IPR curve is used in Well Nodal Analysis for production systems design, analysis and optimization.