The Countermeasures For Stable Production And Reservoir Engineering Evaluation In Zhuang 73 Area Of Changqing Oilfield

The main development department for Zhuang 73 reservoir Chang 3 formation,with the development of the reservoir,73 Zhuang region appears flat contradiction,the main lateral pressure,the main to the well to see water flooding,the water injection pressure rises quickly,high pressure injection wells under injection pressure and increase the validity of the measures is short.The plane showed a single well productivity is low and high pressure area of low pressure area of single well productivity is relatively high.This study is based on the geology of chang 3 reservoir in zhuang 73 area,evaluation,reservoir development effect of injection production parameters and pressure system and high pressure under injected wells underinjection cause analysis and countermeasures research,find out the main problems which restrict the development of reservoir,to determine the technical policy of reservoir development,provide the reliable scientific basis for the long-term stable 73 Zhuang reservoir.The main achievements are as follows:1.Based on the study of the overall yield characteristics of oil reservoirs and the characteristics of single well output changes,various factors affecting reservoir production are analyzed.2.The current low water content of the reservoir in Zhuang 73 area,but there are more than 20%wells and severe flooding,water flooding wells showed a sudden water flooding characteristic,water breakthrough during the transition period after short or no transition period,directly by the absolute recovery stage into the stage of Gao Hanshui,mainly distributed in the main to the flooded wells.3.High level of reservoir pressure is 3,on the whole,but the plane pressure distribution is not balanced.The reservoir area of high and low voltage distribution of a wide range of pressure difference.4.Through the theoretical calculation of reservoir injection production parameters and pressure system technology policy.The present study area reasonable production rate was 1.16%;the ratio of 1.2 reasonable injection production;reasonable pressure level 84%,reasonable water injection strength is 1.4 m ³.D^-1M^-1,the reasonable flow pressure of 5.59MPa;the water injection efficiency of around 60%.5.According to the reservoir influence factors of injection wells under high pressure,proposed to strengthen the dynamic monitoring of water are well taken injection process,injection wells are still on the water does not check whether the packer failure,find out the water uneven reason;strengthen the injected water?sewage?water quality monitoring,especially the monitoring of solid particles in water,reduce reservoir solid damage,and take measures to eliminate the plugging has caused solid damage and proper control of high pressure under injected wells injection pressure and injection quantity.