The Bio - Pro Drilling Fluid System For Direction Well

Chad is world ramsar convention focus areas, no wastewater waste disposal ability, especially control chemicals used, so the requirement in drilling environmental protection is very strict. before The Great Wall exploration drilling fluid company in this region, the region widely used PHPA Claytrol Clay free ( soilless partly hydrolysis polyacrylamide is not scattered) drilling fluid system, drilling process middling collapsed sloughing, shrink diameter, easily happened hole undergauge resistance card, electrical measurement instrument cannot down to the bottom, casing does not reach the designated position in the Underground complex situation, etc. After the Great Wall exploration drilling fluid company entering through They selected and adopted Bio - Pro Polymer drilling fluid system, since January 2008, has drilled 65 exploratory Wells, evaluation Wells, including 14 wells in 2008 , 43 wells in 2009, drilled well 8 mouth in 2010,2010 is expected to deploy evaluation Wells 48 wells, sounding 24 wells. In this context conducted for the application of drilling fluid system deviated project research.This article from the perspective of environmental drilling fluid system, systemic studied polyalcohol polyol, organic silicon, white asphalt drilling fluid system's characteristics, aiming at the Chad BONGOR basin block research a Bio - Pro drilling fluid system.. And then on the system characteristic and function mechanism, inhibitive ability , performance stability and so on has carried on the experimental research. Research found that H - stab to suppress sloughing collapse and prevent the shale has certain effect, but not enough to fully inhibit strata, Since there are still Short up next impeded difficulty under the shale and many chipping phenomenon. The drilling fluid system applied in deviated research,the horizontal well construction provide the theory and practice preparation for future.