EVALUATION OF LOSS CIRCULATION TREATMENT IN WELL Z-5, Z-10, Z-12 AND Z-13

Abstract

Loss circulation is a problem of partial or complete loss of the drilling fluid into the formation, causing fluid circulation becomes impaired. This final assignment will discuss about the loss of circulation in field L. There are 4 development wells in field L, which is Z-5, Z-10, Z-12, and Z-13. Some loss circulations in some depths are caused by natural factors. Some depths during loss circulation being evaluated are in Cisubuh and Parigi formations with limestone rock and claystone rock lithology, which have a large pore size in the drilling mud to enter and loss into the formation.

Treatment loss circulation in this field is blocking with loss circulation material with various compositions. However, some depths after the LCM blockage has not been successfully handled, so the cementing plug process is performed to overcome the loss circulation. The treatment that carried out in the loss zones have been successfully stopped the loss circulation, so that the drilling process can be continued to reach the desired final depth of the well.