| Punan is the Daqing oilfield in southern placanticline a low-permeability oil fields, particularly conflicts between layers, underground reservoir heterogeneity is more prominent, in addition to invest in developing more than 30 years, oil has entered the high water cut stage, in order to ensure that oilfield continued stable yield, good water injection layer is very important work, and plug the device technology trends affecting the merits of the quality of water injection layer. This constant current water allocation mentioned plug device, which is characterized by simple structure, long period of use, lower manufacturing costs. Through various types of plug for analysis and comparison, select OK to plug purely mechanical device, its basic structure is spring-loaded sliding valve. According to the basic knowledge of fluid mechanics to establish a mathematical model of blanking plug and plug the device model by dynamic and static characteristics really simulations, the initial model has been the basic physical properties. Then plug the device on the constant flow situation in the field use technology to make the system adaptive and comprehensive summarized. Through the practical application of water flooding the scene, clearly the conditions of constant application plug device, the first is the well selection conditions, The second layer is selected conditions, The third is the use of attention, In the process of pulling not collide with a blunt object. Constant flow with water injection well technology can improve the quality of stratified injection, water injection wells to reduce testing effort and reduce labor intensity, constant flow eccentric water absorption capacity adapted to plug the device is good, good connectivity layer oil wells, injection pressure than the high but lower than the breakdown pressure 2-3MPa, wells clean wells, water distribution constant flow eccentric plug for the structural strength of steel needs to be improved.
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