Author: bomuo

An operation on a well designed to demonstrate the existence of moveable petroleum in a reservoir by establishing flow to the surface and/or to provide an indication of the potential productivity of that reservoir. Some flow tests, such as drill stem tests (DST) are performed in the open hole. A DST is used to obtain reservoir fluid samples, static bottomhole pressure measurements, indications of productivity and short-term flow and pressure buildup tests to estimate permeability and damage extent. DSTs are performed in the open hole. Other flow tests, such as single-point tests and multi-point tests, are performed after the well has been cased. Single-point tests typically involve a measurement or estimate of initial or average reservoir pressure and a flow rate and flowing bottomhole pressure measurement. Multi-point tests are used to establish gas well deliverability and absolute open flow potential. When you test a small amount of gas or oil over a period of days the pressure it is at will often decline indicating limited amounts of oil or gas present. If a performance modeling indicates that a well can be ultimately completed to achieve a high production rate (e.g. production rate of over 150 Mmcf/d. as reported by Noble Energy regarding Tamar), it is an indication that the pressure in the well was fine, although eventually it is long term testing over several months rather than days that proves an accurate state of affairs

The speed, or velocity, of fluid or gas flow through a pipe or vessel. Also the reservoir flow rate, which is one of the parameters used in flow testing analysis to determine the quantity of gas available in a natural gas field. Even when favorable geological, geophysical and petrophysical data are available for exploration or development activities in a field, there is no alternative of knowing that the wells in the area of interest would actually flow the desired fluid(s) at economical rates. This means that dynamic evidence of recoverable hydrocarbons is needed eventually. Well testing is one of the most effective means of characterizing hydrocarbon reservoirs under dynamic conditions. Such characterization of reservoirs is as accurate as the measured rates and pressures, fluid properties and relevant geological and petrophysical information. It is, therefore, essential to have accurate measurements of both flow rates and pressures due to their complementary nature in given reservoir system. Although in most cases, pressure measurements are accurate, more attention needs to be paid to the flow rate measurements, especially during the early stages of exploration.

A recording of the in-situ rate of fluid flow at different depths in a well, normally one completed for production or injection. The flow profile is a log recorded in a unit such as barrels per day, or as a percentage of the total flow from the reservoir in a production well or into the reservoir in an injection well

The surface pipe through which oil or gas travels from a well to processing equipment or to storage

Type of module installation onto offshore platforms that does not require lifting operations. A specialized vessel transporting the module uses a ballast system to position itself directly above the location where the module is to be installed; it then proceeds to de-ballast and lower the module into place. Once this has been completed the vessel backs off and the module is secured to the support structure