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Three phases of well completion

2018-06-15 18:00:29

Well completion is the process of making a drilled well ready for production. In deviated wells caverns can form through carbonates or sloughing formations which can cause problems for hole cleaning and cementing operations. Thus, cementing plugs or centralizers helps in maintaining a minimum annular space on the low side of a deviated well. It improves cementing operations wells with hole enlargement problems like the one mentioned earlier.

Centralizers can even assist in the running of the casing and the prevention of differential sticking. The cavern expansion occurs in the direction from the bottom wall to the top wall in an inclined hole. During casing-running process, the cement may not flow completely around the pipe in these cavernous sections. But the study refers that the cavern formation features in inclined wells can give a key to further prediction of technology for their washing and casing cementation. Drill cuttings can also accumulate around the pipe near the caverns.



Well completion is generally broken down into three phases:

· Casing – where the piping is run and the cement casing is pumped in.

· Perforation – where holes are blasted through the casing at precise locations for stimulation and production flow. Often done in conjunction with tubing, packing, and setting up the Christmas tree.

· Stimulation – Hydraulic Fracturing, Acidizing. Preparing the rock formation for optimal flow.





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