CAJ | 학술논문

大庆油田杏4-6区自1967年投入开发至今,先后经历了3次加密开发过程.分析3次加密后的开发动态资料,得出了评价加密井提高采收率效果的实用方法.3次加密后的技术采收率分别为40.1%、53.0%和57.8%.从宏观和微观两个方面,对谢尔卡切夫的井网密度法原式进行推导;并利用大庆油田杏4-6区等5个油田的实际数据,建立了水驱开发油田采收率和井控面积的相关经验公式.将杏4-6区的流度值和平均井控面积值代入相关经验公式,得到一次加密后的采收率为38.7%,这与产量递减法确定的采收率40.1%很接近,表明相关经验公式的适用性.
대경유전행4-6구자1967년투입개발지금,선후경력료3차가밀개발과정.분석3차가밀후적개발동태자료,득출료평개가밀정제고채수솔효과적실용방법.3차가밀후적기술채수솔분별위40.1%、53.0%화57.8%.종굉관화미관량개방면,대사이잡절부적정망밀도법원식진행추도;병이용대경유전행4-6구등5개유전적실제수거,건립료수구개발유전채수솔화정공면적적상관경험공식.장행4-6구적류도치화평균정공면적치대입상관경험공식,득도일차가밀후적채수솔위38.7%,저여산량체감법학정적채수솔40.1%흔접근,표명상관경험공식적괄용성.
Xin4-6 region in Daqing oilfield has undergone three infill development processes since 1967.The production performance data from these infill processes are analyzed followed by proposing a practical method for evaluation of enhanced oil recovery(EOR)from infill wells.The technical EOR from them is 40.1%,53.0%and 57.8%,respectively.In microscopic and macroscopic aspects,the original formula of Selkachev's network density method is deduced.Using the data from five oilfields in Daqing(Xin4-6 region),Romashikino,Dumaz,Bovilin and East-Texas,a new relative empirical formula for determination of EOR of waterflooding oilfield and well-controlled area is established.The mobility and well-controlled area in Xin4-6 region are substituted into this formula,the primary infilled recovery efficiency equals to 38.7%,which is close to that given by production decline method(40.1%),showing the reliability or practicability of the relative empirical formula.