![]() ![]() ![]() ![]() 10 Equipment and Personnel-Related Problemsįig.9 Hydrogen-Sulfide-Bearing Zones and Shallow Gas.6.2 Common Contaminants, Sources, and Treatments.1.1 Differential-Pressure Pipe Sticking.This chapter addresses these problems, possible solutions, and, in some cases, preventive measures. 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. The most prevalent drilling problems include pipe sticking, lost circulation, hole deviation, pipe failures, borehole instability, mud contamination, formation damage, hole cleaning, H 2S-bearing formation and shallow gas, and equipment and personnel-related 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. Therefore, two wells near each other may have totally different geological conditions. 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. It is almost certain that problems will occur while drilling a well, even in very carefully planned wells. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |