Drilling Fluid Technology Research On Large Displacement Well In Liaohe Oilfield

Through the analysis of site construction materials such as the BiJiaLing research, Find out the big displacement well drilling in the block regularity understanding and the drilling construction main technical difficulties, put forward the "use of lubricant materials, anti-friction/preventing turbulent washing Wells and other means to achieve the purpose of hole cleaning" technology. Indoor research and big displacement well drilling fluid formula has good lubricity, and can break the lithology, but also has good rheological property, resistance to temperature.According to the proposed technology, treatment agents, such as emulsifier and lubricants, were screened. Meanwhile, their scope were also determined. Combined with the existing technology, we improved and the found the techniques including mucking with turbulent flow, removing sticking with turbulent flow and MTV.The application of the drilling fluids for extended reach well in Xinggu 7-H224 and Jialing 607-3-11 obtained the good lubrication and hole cleaning effect, which solve extended reach well technical difficult problem of the Liaohe oilfield and lay the foundation of its generalization.The drilling fluid performs good anti-sloughing, anti-sticking, cutting transmitting and lowest invasion. This technology was reasonable and operational for drilling operation in Liaohe oilfield. The drilling fluid was one of the best suitable systems. It should be more applying values in the future.