What are the two most important functions of a completion fluid?
Completion fluids improve well productivity by reducing damage to the producing zone, and they can help prepare, repair, clean out, and complete the wellbore during the completion phase. Completion fluid is a solids-free liquid used to “complete” an oil or gas well.
What is completion water oil contact?
A bounding surface in a reservoir above which predominantly oil occurs and below which predominantly water occurs. The oil-water contact is not always a flat horizontal surface, but instead might be tilted or irregular.
What steps should you follow to prepare a well for completion?
Well completion incorporates the steps taken to transform a drilled well into a producing one. These steps include casing, cementing, perforating, gravel packing and installing a production tree. The first step in completing a well is to case the hole.
What is the function of well completion for oil and gas production?
Purpose of well completions The wellbore provides the only path from the surface to the reservoir. To a large extent, the successful production and depletion of a reservoir depends upon the successful completion and workover operations applied to a well.
What is an oil well workover?
Well workover refers to any kind of oil and gas well intervention involving invasive techniques, such as wireline, coiled tubing, or snubbing.
What are the methods of well completion?
Completions can be divided into three categories: open hole completions, liner completions, and perforated casing completions. In most wells, conventional single perforated casing completions are used; however, multiple, alternate, or slim hole completions may be used under certain conditions.
hOW LOng DOEs oil well completion?
It takes an average of 50 to 60 days to drill the well to its target depth, which, with modern technology like horizontal drilling, could be up to two miles underground and up to two miles horizontally.
What is cased hole completion?
In cased hole completions, production casing is run along the entire length of the well and through the reservoir. The cased hole effectively acts as a control mechanism for safe production of desired hydrocarbons and as a barrier preventing the reintroduction of unwanted fluids, gases, and solids into the wellbore.
What is a stimulational oil well?
The term stimulationalso refers to the use of techniques to enhance the natural permeability of the undisturbed rock containing the reservoir (a rock formation) to the point that it can provide economic rates of oil production (permeability is the ability of the rocks to conduct fluid including oil or water).
What makes an oil and gas well completion successful?
Oil and gas well completions should have the following outcomes in order to be deemed successful: Well completions should connect the reservoir to the production tubing so that oil and gas can flow through the pipe to the surface, or fluids can be injected into the reservoir.
What is completion fluid and why is it used?
Completion fluids improve well productivity by reducing damage to the producing zone, and they can help prepare, repair, clean out, and complete the wellbore during the completion phase. Completion fluid is a solids-free liquid used to “complete” an oil or gas well.
What is stimulation in petroleum production?
The term stimulation with respect to petroleum production refers to a range of activities used to increase the production of oil from petroleum reservoirs (a body of rock containing oil in pore spaces or natural fractures) by increasing the permeability of the materials through which oil flows to the well.