Tahe Oil Field Support Just Blocks Permian Plugging Technology Research And Application Of

Well leakage is the effect of drilling operation safety is the most serious one of the complicated situation of well leakage occurs not only bring losses to drilling engineering, but also for the exploration of oil gas resource development brings great difficulty. Due to the complexity of the problem of well leakage well leakage problem is always to perplex domestic and foreign petroleum exploration, and development of major engineering and technical problems. Top block in Tahe oilfield Permian strata of low bearing capability, fractures are development, easily broken, collapse, seriously affecting the three open late cementing quality. The block formation characteristics, we launched the" Tahe oilfield high pressure sealing technology research and application" project research, optimization of drilling fluid technology, on the assumption that a well structure under the premise, through the provisions of treatment options, explicit segmented quantity and property index, standard maintenance processing method, to unify the field operation, effectively ensure safe drilling mud function, the basic realization of the standardization work. Preferably with super plugging effect of Rett super plugging agent as main materials plugging, plugging agent has the chip Yi Qie, high temperature is not easy deformation characteristics, especially suitable for deep well and malignant leakage well plugging; screening with super plugging plugging slurry formulation and developed a scientific and reasonable plan and construction of plugging technical measures in the Permian,4wells malignant leakage formation is pressurized, and achieved good results. Mainly displays in:application of well plugging a success rate of less than50%(previously separate squeeze cement plugging20%) increased to100%, plugging time from the previous8.6days on average (individual wells with up to35days) was shortened to2days or less, cost savings of millions of yuan. The plugging technology not only saves the drilling cycle, at the same time to improve oilfield development speed to make positive contribution.