Study on regional flow field adjustment in late development stage of water flooding oilfield
In the later stage of development,water flooding oilfields generally enter the ul-tra-high water cut period,and low efficiency production with low oil production rate makes the economic and social ben efits of the oilfields gradually worse.At this stage,there are many difficulties and challenges.On the one hand,the water channeling channel is devel-oped,which makes the injected water form an invalid cycle,while the conventional measures are difficult to block and control the water channeling channel.On the other hand,the dis-tribution of remaining oil is highly dispersed,so it is difficult to effectively determine the potential position in the reservoir and excavate it.In order to effectively solve the main prob-lems in the later stage of water flooding oilfield development,this study takes Y oilfield as an example and creatively proposes the regional flow field adjustment technology.This tech-nology is mainly aimed at the well areas with prominent injection and production problems in the oilfield.It is formed through comprehensive analysis of the sedimentary environment of the oilfield,the difference between production layers,the reservoir energy,the change trend of production well indicators,and the production and water absorption test data.For the well area with slow structural change,the profile control strategy based on adjusting the plane injection production relationship shall be carried out.For the well area with large structural changes and large drop between the water injection well and the production well,the production system of the production well shall be changed,and the profile control strate-gy of adjusting the vertical injection production contradiction shall be carried out.For the well areas where the remaining oil is relatively rich,but the production capacity of produc-tion wells and water injection wells is limited,the fracturing measures shall be taken to re-lease the capacity.Through the application of the above key technologies,the oil production of the well area under control is significantly increased,and the trend of rapid increase of water content is suppressed,which makes the production form in the later stage of Y oilfield development obviously better.
water flooding oilfieldlater stage of developmentinjection production relation-shipremaining oilprofile controlfracturing
万方数据
维普
