| Water injection Development of Nan Liang westen C4+5 Reservoir from 2007.With the extension of water injection development time,the most important development contradiction is the following aspects: 1 main oil layer length C4+51’s layer injection and production correspondence is poor,well control degree need to be improved.2 uneven water absorption of each section,contradictions between layers is serious.In order to improve the development effect of the block and solve the existing problems and contradictions in the development,it is necessary to carry out reservoir development evaluation for establish reasonable water injection development policy.In this paper,first of all,the reservoir is geologically described.Then,aiming at the history of water injection development in the C4+5 reservoir of the Nan Liangxi Oilfield,this paper studies the law of increasing the water content of the reservoirs at different stages of oilfield development,the characteristics of oil well productivity and the water quality,pressure keep ability and change characteristics.Based on the modern reservoir engineering method,a variety of waterflooding laws are used to evaluate the effect of water drive development,water flooding effect,waterflooding recovery and so on.Finally,the numerical simulation model of C4+5 reservoir is established,and match the history of development and production since the oil field has been developed.The study of the 4+5 reservoir,will let us know the underground oil and water movement law,reveal the control of oil and water movement of geological development factors,pointing out the main reasons for the existing production contradictions,evaluation of the adaptability of existing well pattern.According to the comprehensive analysis,the water storage capacity of the long 4+5 reservoir is low,the water flooding coefficient is low and the water injection efficiency is low.The main technical measures are the fine stratified water injection and the well pattern encryption adjustment. |
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