Horizontal Well Optimization Design Research Of Chemical Lfooding After Polymer Lfooding

Sazhong development zone is located in Daqing placanticline constructed Northern,reservoir belonging to River-Delta deposition system, for typical of land phase more reservoirsandstone oilfield, has with reservoir of more, and non-are mass sexual strong, features, aftermore than40years development Hou, various reservoir are has different degree water flooded,but for effective thickness is greater than5m around of thick reservoir in development in theby multiple factors effect, especially by non-are mass sexual effect, poly drive Hou inreservoir of upper Department still exists water flooded degree more light of thicknesssegment, exists must volume of remaining oil, In order to improve the overall development ofthe oil field effect, further increase the recoverable reserves of oilfield, gets thick oil reservoirin extra high water cut oilfield further Eor technology, SA development zone in thickreservoirs in the top remaining oil after polymer flooding horizontal well in tapping theattempt.This for Daqing la SA apricot oilfield poly drive Hou River sand storage layer remainingoil difficult to mining of problem, using fine geological research results, and check well, andmeasuring well, and test, and production dynamic, information, used number die, and real die,and integrated analysis, means, combination indoor chemical drive oil experimental method,quantitative has poly drive Hou different level well chemical drive method improve harvestrate range, excellent elected has for poly drive Hou level well chemical drive method,recommended has poly drive Hou level well and direct well combination chemical drive wellnetwork optimization mode, Production of chemical flooding-flooding programme ofhorizontal wells for field, provided strong technical support.The topics development has level well large flat geological model, first carried out haspoly drive Hou level well chemical drive method optimization experimental, by on ternarysystem, and II Yuan system, and high concentrated polymer, and poly table agent,4speciesmethod drive oil effect evaluation, for Yu Ju drive Hou level well chemical drive of chemicalagent system for II Yuan composite system; second carried out has poly drive Hou level welland direct well combination chemical drive well network mode optimization experimental,best of well network mode for level well note mining well network. Chemical drive well andsuggested that the field-level programmes: the first injection of high-concentration polymerslug, then inject a binary compound system; later in the injection-production well spacing of horizontal well development, transferred to the horizontal, and vertical wells and productionof well pattern model.