Different Sets Of Injection Parameters Of Sub-layers Polymer Flooding Design Method

Polymer injection parameters are adjustments to the programme design, polymer injection process of polymer flooding, ground capacity-building of key technology in polymer flooding development plays an important role. With the deepening of oilfield development and remaining oil distribution in complex, CROSSWELL, exacerbates tension between layers. Blocks into difficulties, in some wells of polymer flooding in low permeability layer using low profile wrap-prone, high polymer, enhanced oil recovery and low problems, And previous injection parameter design of the same station using the same molecular mass, does not consider the effects of different types of group differences this problem. Studied the different types of alternative injection of well group in molecular weight, molecular weight and concentration and the permeability of the match, alternating slug combinations, effect of injection rate on recovery rate is presented and a focused content on the economic effect, achieve injection scheme for different reservoir design and technical support process tracking adjustment.Breaking through in preparing Bei Yi Qu Duan Xi Xi SII10~ SIII10 class reservoir for polymer flooding oil scenario, according to conditions of interlayer formation between wells in block, into the greater difference in abilities, character design for single well injection parameters you want, most used substantially ensure reservoir and best oil displacement effect. In accordance with the classification of groups of geology condition on the injection wells, according to different well optimization of single molecular weight alternative injection profile combination. Namely: emphasis on weak-weak, balanced profile and intensity-modulated displacement displacement, flooding, mainly four kinds of manner. Reference polymer injected parameter reservoir match relationship chart, and according to different type wells group classification, reservoir static development status, and actual note mining dynamic development features, optimization design blocks polymer molecular volume alternating injected, and single wells injected concentration, and injected speed, and slug combination, and polymer dosage, injected parameter, improve injected parameter and reservoir of match degree, achieved minimum scale personalized design drive oil programme, and most substantially improve harvest rate target.