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It is almost certain that problems will occur while drilling a well, even in very carefully planned wells. For example, in areas in which similar drilling practices are used, hole problems may have been reported where no such problems existed previously because formations are nonhomogeneous. Therefore, two wells near each other may have totally different geological conditions.  
It is almost certain that problems will occur while drilling a well, even in very carefully planned wells. For example, in areas in which similar drilling practices are used, hole problems may have been reported where no such problems existed previously because formations are nonhomogeneous. Therefore, two wells near each other may have totally different geological conditions.


==Types of drilling problems==
== Types of drilling problems ==
In [[Well planning|well planning]], the key to achieving objectives successfully is to design drilling programs on the basis of anticipation of potential hole problems rather than on caution and containment. Drilling problems can be very costly. The most prevalent drilling problems include:


* [[Stuck pipe|Pipe sticking]]
In [[Well_planning|well planning]], the key to achieving objectives successfully is to design drilling programs on the basis of anticipation of potential hole problems rather than on caution and containment. Drilling problems can be very costly. The most prevalent drilling problems include:
* [[Lost circulation|Loss of circulation]]
* [[Hole deviation|Hole deviation]]
* [[Drillpipe failures|Pipe failures]]
* [[Borehole instability|Borehole instability]]
* [[Mud contamination|Mud contamination]]
* [[Formation damage|Formation damage]]
* [[Hole cleaning|Hole cleaning]]
* [[Hydrogen sulfide-bearing zones|H<sub>2</sub>S-bearing zones]]
* [[Shallow gas zones|Shallow gas zones]]
* [[Equipment related drilling problems|Equipment and personnel-related problems]]


Understanding and anticipating drilling problems, understanding their causes, and planning solutions are necessary for overall-well-cost control and for successfully reaching the target zone.  
*[[Stuck_pipe|Pipe sticking]]
*[[Lost_circulation|Loss of circulation]]
*[[Hole_deviation|Hole deviation]]
*[[Drillpipe_failures|Pipe failures]]
*[[Borehole_instability|Borehole instability]]
*[[Mud_contamination|Mud contamination]]
*[[Formation_damage|Formation damage]]
*[[Hole_cleaning|Hole cleaning]]
*H<sub>2</sub>S-bearing zones
*[[Shallow_gas_zones|Shallow gas zones]]
*[[Equipment_related_drilling_problems|Equipment and personnel-related problems]]
 
Understanding and anticipating drilling problems, understanding their causes, and planning solutions are necessary for overall-well-cost control and for successfully reaching the target zone.


== See also ==
== See also ==
[[Drilling induced formation damage]]


[[PEH:Drilling Problems and Solutions]]
[[Drilling_induced_formation_damage|Drilling induced formation damage]]
 
[[PEH:Drilling_Problems_and_Solutions]]


[[Category: 1.6 Drilling Operations]]
== Category ==
[[Category:1.6 Drilling operations]] [[Category:NR]]

Latest revision as of 13:33, 26 June 2015

It is almost certain that problems will occur while drilling a well, even in very carefully planned wells. For example, in areas in which similar drilling practices are used, hole problems may have been reported where no such problems existed previously because formations are nonhomogeneous. Therefore, two wells near each other may have totally different geological conditions.

Types of drilling problems

In well planning, the key to achieving objectives successfully is to design drilling programs on the basis of anticipation of potential hole problems rather than on caution and containment. Drilling problems can be very costly. The most prevalent drilling problems include:

Understanding and anticipating drilling problems, understanding their causes, and planning solutions are necessary for overall-well-cost control and for successfully reaching the target zone.

See also

Drilling induced formation damage

PEH:Drilling_Problems_and_Solutions

Category