The test Build Up, is to take data and the study of a site through a well that has been closed temporarily for that purpose. One of the main objectives of this analysis is to determine the static pressure of the deposit without having to wait weeks or months for the reservoir pressure to stabilize.
This test also allows us to know some parameters such as:
-Effective permeability of reservoir
-Effects of damage around the well
-In case of failures
-Some interference from the well production.
-Boundaries of the reservoir, where there is a exclusive persuasive essay help strong push by water or where the aquifer is not large compared with the size of the deposit.
For the execution of the test are assumed some characteristics buying college papers among which we can find:
-Horizontal or of uniform thickness
-Constant formation volume factor
-There is no gravity
To perform the test, well must be producing at a constant rate for a certain time before closing in order to establish a stabilization of pressure in the drainage area. Later the well, usually closes this process is done on surface, and begins to take time closing and register values of pressure of the well, which should begin to increase or restore from the pressure value of Fund flowing, to reach a value of pseudo equilibrium with the reservoir static pressure.
Taking the data of pressure changes through the closing time, it is possible to estimate by applying mathematical principles of superposition parameters previously set forth.
The attached table shows how it must be the behavior of the curve of the rate with respect to the time before and after the closure of the well during a test Build Up.