Strongly Inhibitive Drilling Fluid Technology in Icelake Area in Kazakhstan

In drilling the top hole of the wells in Icelake,Kazakhstan,a mud density of 1.6 g/cm3 was required to control the high-pressure shallow water zones.Drilling fluid properties became difficult to manipulate because of the severe mud making formations and the greater ROP,which led to frequent downhole troubles to occur.A set of drilling fluid techniques was then engineered in an effort to minimize the downhole problems.The field practices showed that the drilling time for the first well was 49% less than the 5 wells previously drilled,and the cost for the mud materials was reduced by 38%,while the second well further reduced the mud cost by 21% compared with the first well on which the mud techniques were applied.