CAJ | 학술논문

大港油田孔南官195断块单井日产能力较低,层间层内矛盾恶化,部分油组水淹严重,剩余油分布规律认识不清.利用核磁共振技术,从微观角度研究不同流动单元的驱油特点和剩余油分布特点.研究发现:I类流动单元样品驱油效率比Ⅱ类流动单元高7.47%,但Ⅱ类流动单元样品水驱后聚合物驱油效率提高6.35%,剩余油主要分布于油层动用程度差的流动单元中.在完善注采系统基础上,挖潜时对I、Ⅱ类流动单元通过层间卡封和堵水调剖挖掘中上部剩余油,对Ⅲ、Ⅳ类流动单元采取补孔、打新井方式提高储量动用程度.采取一系列挖潜措施后,预计官195断块最终采收率将能提高5.1%.
대항유전공남관195단괴단정일산능력교저,층간층내모순악화,부분유조수엄엄중,잉여유분포규률인식불청.이용핵자공진기술,종미관각도연구불동류동단원적구유특점화잉여유분포특점.연구발현:I류류동단원양품구유효솔비Ⅱ류류동단원고7.47%,단Ⅱ류류동단원양품수구후취합물구유효솔제고6.35%,잉여유주요분포우유층동용정도차적류동단원중.재완선주채계통기출상,알잠시대I、Ⅱ류류동단원통과층간잡봉화도수조부알굴중상부잉여유,대Ⅲ、Ⅳ류류동단원채취보공、타신정방식제고저량동용정도.채취일계렬알잠조시후,예계관195단괴최종채수솔장능제고5.1%.
The reservoir in Kong 1 member in Guan 195 Fault Block of Kongnan Area is Alluvial environment,there are a series of problems arising in its high water-cut stage,such as the low single well oil production,poor interlayer and inner contradictions,serious water flooding of oil layer,misunderstanding the role of the remaining oil distribution.NMR imaging technique is applied to research the characteristics of Oil displacement efficiency on different fow units from microscopic angel.The study reveals that the Oil displacement efficiency of ikind of flow units is 7.47% higher than that in the Ⅱ kind of flow units,but after the water floodiing,the polymer displacement efficiency of Ⅱ kind of flow units can recovery 6.35% more than tha in the ikind of flow units.in other words,remaining oil is mainly distributed in the flow units of low producing degree.Thereby,the treatment measurements for oil well of I and Ⅱ kind of flow units are plugging and water plugging to recovery the remaining oil in the upper oil layers.the treatment measurements for oil well of Ⅲ and Ⅳ kind of flow units are perforations adding and drilling new wells.ARer the implementation of the measures,it is predicted that the ultimate recovery rate will be enhanced 5.1%.