The Identification And Evaluation Of Excellent Source Rockin Tanan Sag And Nanbeier Sag

In the90s, for a class of lamadian oilfield reservoir PortugueseⅠ1-2reservoir has beenfully carried out polymer flooding to improve oil recovery injection-production development,and has obtained the good effect of oil increase. Is coming to an end, as the type of reservoirslamadian oil field oil will become the next steps of remaining the main object.4-10reservoirnorth north block area Mr Ⅲ lamadian oilfield is the first industrialization promotion class iireservoirs blocks, the blocks in2006began production in September, October2007, thepolymer injection of that year until June of2008high concentration change note. Block waterstarts from April2008to drop, the water cut from93.7%to90.5%in June2008, a1.1%dropin monthly, but high concentration injection after monthly water fell by only0.5%, comparedwith numerical simulation, the water cut decreased significantly slow also. This topic throughto the second type reservoir, S Ⅲ4-10reservoir fine dissection of different microfacies,overall research reservoir sedimentary characteristics, reservoir development condition, thecondition of plane and vertical reservoir connectivity, reservoir using condition and thedistribution of remaining oil on plane and vertical, and analysis of different permeabilitysection and thickness of reservoir sedimentary characteristics, reservoir developmentcondition, the condition of plane and vertical reservoir connectivity, oil layer use conditionand remaining oil distribution in plane and vertical. On this basis, the research differentpermeability, reservoir thickness of high concentration polymer solution injectivity, injectionconcentration and injection rate and the adaptability of different permeability, reservoirthickness. Compared with the type of reservoir, studies of the changes of high concentrationpolymer drive oil state, include： pressure rise, water absorption index decline,injection-production capacity, resistance coefficient, and well group differences, the conditionof reservoir after polymer injection use ratio, water drop, etc. Finally, the second typereservoir high concentration polymer flooding effect rule, through compared with the averageconcentration in the polymer flooding, rapid decline in analysis of high concentration polymerflooding water cut period, through different forms of well water cut curve, analysis ofdifferent permeability, reservoir thickness characteristics of high concentration polymerflooding effect. The second type reservoir after polymer injection block scheme adjustment,has important guidance and reference, has a great prospect of popularization and application.