Research On Polymer Flooding Development Of Pu I Formation In B Transition Belt Of Daqing

Polymer flooding development feasibility in intermediate belt B is analyzedand studied from variant aspects such as formation development, formation characteristics,well pattern deployment and determination of well spacing, and polymer floodingdevelopment effect after infill is analyzed and predicted.Group Pu I oil layer in clean oil zone in Development area A has been developed bypolymer flooding, and the development effect is good. Geologic reserve of Group Pu I oillayer in intermediate belt in Development area A is13.4%of that of Group Pu I oil layerin the whole area, which is the main base of the alternative of stabilized production in thefuture. Both of the achieved effect of Group Pu I oil layer in clean oil zone in the polymerflooding industrialized block and the pilot polymer flooding experiment in intermediatebelt B indicate that there is certain development potential in Group Pu I oil layer inintermediate belt B, and compared with polymer flooding in clean oil zone, dynamicbehaviors in injection wells and production wells by polymer flooding in intermediate beltB is almost the same as in clean oil zone, but the injection pressure increasing amplitudeand the liquid production decreasing amplitude are both more than those in clean oil zone,moreover, there is democracy for four-spot pattern in injection and production relationshipcompletion extent, because there is difference between injection and production wellspacing in the northern and the southern central experimental area so as to certaindifference in response effect. In order to ensure the effect of polymer floodingdevelopment in Group Pu I oil layer in intermediate belt B, according to the developmentexperience and experimental achievements in blocks on production, through the studies ondeposition and development characteristics, residual oil potential is analyzed, layer systemoptimized, well pattern deployment selected, so that infill adjustment well patterndeployment by polymer flooding in intermediate belt B is determined, which experiencesare provided for those blocks that need to be infilled.