Perforation Completion Technology Of Thin And Poor Reservoir In Daqing Oil Field

At present, in low porosity, low permeability, low saturation economic marginal oil field of Daqing placanticline peripheral basin, producing reserves is no more than a third of proven reserves. Hundred millions ton of remaining reserves main exist in low permeability, thin and poor reservoir. Geologic condition of this part reservoir is complex and recovery benefit of it is poor. And it is easy to be polluted to reduce well productivity during production period. Therefore, it is necessary to research completion protection technology of this kind of reservoir.The study of the theme majors in perforation completion technology of low porosity, low permeability, and tight sand reservoir. With geologic characteristic and reservoir physical property analysis of Daqing oil field's thin and poor reservoir, damage mechanism of the reservoir has been researched, damage factor and damage degree were determined. A series of ultrajets are developed, such as 1MD3 perforating gun, inner blind hole perforating gun, unconfined perforating gun, and so on. A series of efficient perforating technology are also optimized and assembled, such as recombination perforating, orientable perforating, tubing conveyed perforating and production string combination operation technology, and so on. The perforating guns and perforating technology have significant result on reducing formation pollution and enhancing reservoir permeability of thin and poor reservoir.