Further Enhance Waterflood Recovery Methods Research On Ultra-high Water Cut Stage Of Shuang He Oilfield

Nowdays，a significant proportion of flooding oil field has in Ultra-high Water Cut stageand exploration and development of oil are getting more difficulty. How to evaluate the waterinjection oilfield’s waterflooding effect correctly，which provide the correct guidance of theeffective water injection so as to formulate rational countermeasures to enhance the recoveryof the yield is the urgent issue need to address.In this paper，We take the Ⅷ Ⅸ main oil group of Shuanghe Oilfield as an example，starting from the actual characteristics of the reservoir，and through the using of reservoirnumerical simulation method，we studied the current residual oil distribution of the Ⅷ Ⅸmain oil group of Shuanghe Oilfield.At the macro，we identified the relationship between themain reservoir water injection multiple and the current distribution of the remaining oil；Atthe micro，we identified the relationship between the moved remaining oil type andwaterflooding pore volume multiple.We use the different regions grading description methodto explain the relationship between the residual oil and waterflooding pore volumemultiple.By oil reservoir engineering and fuzzy comprehensive evaluation theory， werespectively established the determine indicators system and analysis determinedmathematical model of well and lay of waterflooding advantage seepage paths.By combiningwith the oilfield actual production situation，we identified the distribution of well and lay ofwaterflooding advantage seepage paths.Through approximate simulation of the actualgeological conditions，we demonstrated different well spacing，different injection speeds，and different angles of rotation of the main waterflooding line magnitude of the impact on theEOR of Ultra-high Water Cut late stage.According to the actual characteristics of the Ⅷ Ⅸ main oil group of Shuanghe Oilfield，we proposed several scheme for further improving waterflood recovery and used the reservoirnumerical simulation method to obtain the optimal scheme. The research has an importantsignificance to instruct the development of Ultra-high Water Cut stage oilfield.