摘要
对于天然水驱油藏而言,水体的大小直接反映了油藏天然能量的活跃程度,在很大程度上决定了油田的开发方式、开采制度和布井方案,因此水体大小的确定对油田开发具有重要的现实意义。本文结合流压速率法,即用各井点的流压变化值近似代替平均地层压力的变化值,并用动态资料得到动用地质储量来改进物质平衡法,建立了一种新的计算水体规模的计算方法。该方法可以直接利用井底流压数据来进行水体规模的计算,而不需要知道确切的地质储量和平均地层压力等资料。该方法应用于南海东部地区的X油田,利用公式计算出天然水体倍数,并且通过对比油藏数值模型的历史拟合情况以及动态认识,计算结果与生产动态也比较一致,因此认为方法计算结果较为合理。该方法相比之前的方法更加准确、可靠。
For the natural water drive reservoirs,the aquifer size directly reflects the activity degree of natural energy in the reservoir,and determines the development mode,production system and well layout plan of the oilfield to a large extent.Therefore,the determination of aquifer size is of great significance to the oilfield development.In this paper,a new method for calculating aquifer size is established by combining the flowing pressure rate method,which uses the change value of the flowing pressure at each well point to approximately replace that of the average formation pressure,and the dynamic data may be used to obtain the produced geological reserves for improving the material balance method.This method can directly use the flowing pres-sure data to calculate the aquifer size without knowing the exact geological reserves and average formation pressure.This method is applied to Oilfield X in the eastern South China Sea,and the natural aquifer multiple is calculated by the formula.It is considered that the calculation result of this method is reasonable based on dynamic understanding of reservoirs after compared with the historical fitting of the reservoir nu-merical model.This method is more accurate and reliable than the previous.
作者
李小东
任飞
杨勇
刘远志
孙常伟
江任开
刘静
Li Xiaodong;Ren Fei;Yang Yong;Liu Yuanzhi;Sun Changwei;Jiang Renkai;Liu Jing(Shenzhen Branch,CNOOC China Limited,Shenzhen Guangdong 518024;Schlumberger Technology Services(Beijing)Ltd.,Beijing 100015)
出处
《中外能源》
CAS
2021年第2期35-38,共4页
Sino-Global Energy
基金
中海石油(中国)有限公司科研项目“考虑沉积韵律单砂体储层精细构型及描述”(编号:YXKY-2018-SZLH-03)。
关键词
天然水体
水体规模
天然能量
物质平衡方程
流压速率
natural aquifer
aquifer size
natural energy
material balance equation
flowing pressure rate
