The Study On Optimization Technology In Potential Expoloration Measures Of Remainding Oil In The Extra High Water Cut Stage In Lasaxing Oilfield

After more than 40 years exploration in Daqing Lasaxing oilfield, it has entered into extra high watercut development stage at present. But it is still the major part in the exploration of Daqing oilfield. Its oilproduction annually account for 68.82% of its total oil production, and its remaining recoverable reservesaccount for 80.05% of its total oil production. The remaining recoverable reserves in Lasaxing oilfield arein the major reservoirs. The remaining recoverable reserves in the basic well pattern and primary wellaccount for 80% of its remaining recoverable reserves by waterflooding in Lasaxing oilfield, while thesereservoirs have entered extra high water cut exploration stage, the water cut in the basic well pattern inLasaxing oilfield and the primary adjusting well in the Lamadian has reached as high as above 90%.Since Lasaxing oilfield has entered extra high water cut stage, important adjusting measures, such aswell pattern infilling for two times, adjusting production injection system, adjusting structure, have beenimplemented and the force in fracturing, reperforating and water plugging has been increased all the time,which has achieved good development results. With the exploration of Lasaxing oilfield, there Will be morecomplex problems which will be faced, such as the distribution of remaining oil becoming separated.Considering the complexity and diversity of the reminding oil in high water cut stage and extra high watercut stage, according to different types of reminding oil, we should implement the corresponding tappingmeasures, and optimize the tapping measures in order to improve the results of the measures, which is theimportant topic and orientation we should resolve as soon as possible at present.Based on the topic of the remaining oil distribution and the measure optimization in extra high watercut stage, this paper make analysis on the development of variety reservoirs and potential development, andmake research on the adaption of different tapping measures and the optimization of remaining oil tapping.The research show that Lasaxing oil field has many potential developments, although it has entered highwater cut stage. If we make fine analysis, fine tapping, fine adjustment, and implement the reasonabletechnological measures and methods, we will make the furthest exploration of the remaining oil, andincrease the final recovery efficiency.