Thank you Warnie Information I found although doesnt give any timeline as to how long this all takes:
The well is now at total depth. The drill string is removed from the well for the final time, and the next phase, well logging, is about to begin.
EVALUATING THE WELL Logging the well In the petroleum industry, logging is a technique used to record the characteristics and depths of the rocks penetrated by drilling. Logging a well is important because it provides geologists and engineers with an analytical tool upon which to base their
evaluation of whether the hole will be a good well. Cylindershaped well-logging tools contain sensors that record important characteristics of the rocks through which the well was drilled, including porosity, rock type, hole diameter, downhole temperature, and electrical resistivity.
Using the well logs as a guideline, the geologist has carefully noted the precise depths where oil and gas occur. However, the vast majority of new wells in Pennsylvania will not produce oil or gas by natural flow. The reservoir rocks usually do not have permeability high enough for the hydrocarbons to flow naturally. Therefore, the reservoir must be stimulated to enhance the porosity and permeability so that the well can produce commercial quantities of oil and gas. First, the final string of casing, the production string, which is extended below the deepest target reservoir, is put into the hole and cemented in place. This effectively seals off the entire portion of the well from which production is anticipated. Explosive charges known as shots are lowered down the hole to the precise depth of the deepest reservoir in the well from which production is desired. The shots are detonated, creating perforations, or holes, in the casing at the level of the deepest reservoir. These perforations provide openings for sand, water, and possibly acid, which will be pumped down the well and through the perforations at high pressures. This causes the rock to break down. The process is known as hydraulic fracturing, or more simply, fracing (pronounced “fracking”) the well. The goal of fracing is to increase permeability by opening an oil and gas pathway for easier flow into the well. Acid and water are used to dissolve minerals and clean out the newly formed fractures. Sand flows into the fractures to prop them open. The PRODUCING THE WELL 15 acid and water are then permitted to flow back out of the well, and the sand remains in place to keep the fractures open. If the procedure is successful, the petroleum well responds quickly by flowing with greater pressure and volume than were measured prior to fracing. The process of perforating, fracing, and flowing the well can be repeated for successively shallower reservoirs until all the potentially productive reservoirs have been treated. The result is a well with good pressure and higher volumes of oil and gas than would have been possible without the fracing process. Of course, higher volumes of oil and gas translate into greater economic benefit from the well.
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