宝浪油田宝北区块Ⅰ—Ⅱ油组合理注采井距研究  

Study on reasonable producer-injector spacing about Ⅰ-Ⅱ oil group in Baobei block

作　　者：黄金山[1] 

机构地区：[1]中国石化集团油田勘探开发事业部,北京100728

出　　处：《油气地质与采收率》2014年第2期38-40,113-114,共3页Petroleum Geology and Recovery Efficiency

摘　　要：宝浪油田宝北区块储层渗透率低,Ⅰ—Ⅱ油组当前注采井距为260 m,难以建立有效驱动体系。应用启动压力梯度法、低渗透油藏经验公式法和压力恢复测试法,对研究区技术极限合理注采井距进行了研究,3种方法计算的合理注采井距分别为174,170和168 m。分析宝北区块Ⅰ—Ⅱ油组调整井新井投产或老井上返补孔初期产油量统计结果可知,平均单井初期产油量约为6 t/d,现有井网条件下单井控制石油地质储量为0.93×104t,利用经济井网密度对研究区的合理注采井距进行了研究,在油价为70美元/bbl时,经济极限井网密度为35口/km2,合理注采井距为169 m。With the development of reservoir performance,the reservoir fluid distribution in Baobei changes accordingly,and the per-meability of reservoir gradually reduced as well.The currently injector spacing of Ⅰ-Ⅱ oil group is 260 m,it is difficult to establish aneffective driving system,it is unable to meet the needs of current injection.The water injection intensity of reservoir is too high,andpart of the injectors doesn't work.This paper applies methods such as,section pressure gradient method,empirical formula technologyof reasonable well spacing,investigation radius method,and economic limit well spacing method,and based on comprehensive compar-ative analysis of the advantages and disadvantages of various methods,and then proposes the reasonable spacing aboutⅠ-Ⅱ oil groupin Baobei region.The analysis concludes that,the current injection well spacing of Ⅰ-Ⅱ oil group is too far.To establish an effectivedrive system and improve the oil displacement efficiency of producer-injector well,the reasonable well spacing should be 170 m(dis-tanceofthe well spacing isrelated to oil prices).Under the existing conditions,thewell spacing should be adjusted in field.

关 键 词：低渗透油藏 合理注采井距 压力梯度 注水 宝北区块 

分 类 号：TE34[石油与天然气工程—油气田开发工程]