| With the periphery of Daqing Fuyang reservoir reserves increased,reserves are mainly located in the extension area,submitted reserves more difficult reserves,poor reservoir property,effective thickness of small sand bodies,small scale,poor mobility,Low pressure coefficient,production development effect is poor,poor economic benefit,from nearly five years of production block effect,low production capacity in place,at a rate of 60 to 70%,with an average of 65% tons capacity,number of wells,millions of tons of high capacity investment.The core problem of the economic and effective exploitation of the difficult reserves is how to increase the oil production of the single well and maintain a long stable period of production.The exploitation of refractory reserves is closely connected with the current development technology and economic conditions,and is restricted by factors such as reservoir characteristics,technological technology,policy and oil price.According to the characteristics of reserves difficult mining Fuyang reservoir,this study determined the permeability,effective thickness,oil yield and oil viscosity four reserves evaluation parameters,establishes four kinds of unused Fuyang reserves division standard,the research priorities and technical requirements of reserves;study determined to establish effective drive system,high water flooding well pattern,reasonable control degree and the development effect of well spacing;the improvement of Fuyu reservoir in Chaochang area of oil and water layer identification chart made of oil and water wells in different reservoir penetration ratio and sand strength parameters to guide the overall fracturing,perforation and fracturing program implementation;development four a fit in the geological conditions of long region formation pressure coefficient,oil viscosity,permeability limit limit limit and saturation pressure difference limit,the leading note hydration The working system of advanced water injection parameters,such as rational formation pressure,reasonable PV number,reasonable water injection intensity and reasonable injection time,and later water injection adjustment intensity and reasonable flow pressure system are summarized.Combined with practice,the construction mode of advanced water injection capacity is summarized.The research results have successfully guided the effective development of the difficult reserves in the periphery of Daqing,and achieved good development results and significant economic benefits,which opened up a new way for the effective and economical utilization of low permeability and difficult to recover reserves. |
