What Is Well Testing? 6 Types Of Well Tests

Posted by James Carter on April 29th, 2021

 What isWell TestingandWell Testing services?Well, Testing is carried out to determine the ability of the formation to produce fluids. It is based on the development of the field. Well, Testing services can be divided into identifying the nature of the reservoir fluids, as well as the estimation of the well's comportment. 

The parameters that are calculated with the Well Testing services in TX are the following:

  •         Drainage area.
  •         Reservoir pressure (P).
  •         Permeability of the formation (K).
  •         Damage or stimulation in the formation (s).
  •         Reservoir limits, anisotropies, reservoir volume. 

Well Testing services: Well test types 

Infectivity Tests (Fall-Off):

With this Well test, we have a qualitative idea of the permeability of the zone and the feasibility that a zone presents to a stimulation treatment and/or hydraulic fracturing. The injection test can be interpreted as any pressure test. 

Isochronal Test (Deliverability analysis):

 It consists of making the good produce at different rates during equal time periods. And, concluding the well until reaching the average pressure of the drainage area between two subsequent rate changes. 

Multi-rate test (Multirate test):

With the multi-rate good test, you can cycle from a free variable-rate to a series of constant rates, for a background pressure test, with constant changes in the flow rate. It helps to minimize the changes in the good storage coefficients and the effect of the segregation states.

Multi-rate Well Testing services show great advantage when changing from the storage period to the medium period and reduce the pressure drop. One downside is that it is difficult to control due to rate fluctuations; difficult to measure, especially continuously. 

Pressure Declination Test (Drawdown):

Pressure DeclinationWell Test provides information about the permeability, damage factor, and volume of the reservoir. The advantage is that this test it is carried out with the well in production. Its biggest disadvantage is the difficulty in maintaining a constant rate. If the constant rate cannot be achieved, then the use of Multi-rate Testing is recommended. 

Interference Testing:

In an interference Well test, a Well is produced, and pressure is observed in a different well (or wells), monitoring pressure changes outside the reservoir, at a distance from the original producing well. The pressure changes at a distance from the producing well is much smaller than in the producing well as such. Therefore, an interference test requires a pressure measurement sensor and can take a long time to complete. In short, the general purpose of this test is to determine if there is a relation between two or more wells in a reservoir.

When there is a relation, it provides estimates of permeability, porosity, and compressibility and determines the possibility of anisotropy in the producing stratum. 

Pressure Restoration Tests (Build up test):

This Well Test is performed by producing a well at a constant rate for a certain time. Often from this data (remember that the pressure in the well is a function of time), it is possible to estimate the permeability of the formation, the pressure of the current drainage area, and characterize the damage or stimulation heterogeneities of the reservoir or reservoir limits. Finally, the pressure restoration test is a Well test used to determine the pressure in the transitory state. Call us for professional well Testing services in TX.

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James Carter

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James Carter
Joined: October 6th, 2020
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