特高含水油藏开发后期剩余油精准挖潜技术
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摘要
油藏进入特高含水期,剩余油储量及分布复杂,挖潜难度大。为改善水驱开发效果、提高采收率,本文以文中油田"老三块"为例,采用油水两相相对渗透率曲线法核算了剩余油储量,并在精细地质研究的基础上,结合测井二次解释结果和生产动态资料,以砂体储能系数、地层系数以及流动带指数等为指标,将油藏划分为一、二、三类。通过分析不同类型油藏的剩余油分布潜力,提出了不同类型油藏的剩余油挖潜方法。研究结果表明"老三块"油藏剩余油潜力较大,呈现出"普遍存在,局部富集"的基本特征,纵向上各小层剩余油分布差异大。利用该方法对文中油田"老三块"剩余油进行了挖潜,水驱效果大大提高,取得了较好的增产效果和经济效益。
Three block reservoirs of Wenzhong oilfield get into the ultra-high water cut development stage,remaining oil reserves and distribution characteristics became very complex,and the ability of stable production was difficulty.Then the remaining oil reserves were calculated by the method of water drive characteristic curve and oil-water relative permeability curve,through analysis the results of secondary logging interpretation and production dynamic data,has been clear about the distribution of the remaining oil.The study results showed that the remaining oil potential of old three blocks reservoir was larger,demonstrated the"Universal existence and local enrichment"of the basic characteristics,the distribution of remaining oil was different in the longitudinal direction.In the field of practice,proposed the corresponding methods and measures to improve oil recovery according the classified reservoir,and has achieved good results and economic benefits.
Three block reservoirs of Wenzhong oilfield get into the ultra-high water cut development stage,remaining oil reserves and distribution characteristics became very complex,and the ability of stable production was difficulty.Then the remaining oil reserves were calculated by the method of water drive characteristic curve and oil-water relative permeability curve,through analysis the results of secondary logging interpretation and production dynamic data,has been clear about the distribution of the remaining oil.The study results showed that the remaining oil potential of old three blocks reservoir was larger,demonstrated the"Universal existence and local enrichment"of the basic characteristics,the distribution of remaining oil was different in the longitudinal direction.In the field of practice,proposed the corresponding methods and measures to improve oil recovery according the classified reservoir,and has achieved good results and economic benefits.
引文
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[10]窦宏恩.高含水期油田提高原油采收率的新理论[J].特种油气藏,2009,16(6):89-93.
[2]程妮,席天德,薛金泉.延长油田东部浅层油藏特征及改善开发效果研究[J].非常规油气,2016,3(2):65-69.
[3]高渐珍,薛国刚,慕小水,等.东濮凹陷复杂断块群成藏主控因素及成藏模式[J].断块油气田,2011,18(6):691-695.
[4]罗二辉,王小东,丁亚平,等.港东七八断块特高含水期剩余油潜力研究[J].石油地质与工程,2011,25(1):76-78.
[5]王苛宇,杜燕,申哲娜,等.延长油田注水开发采收率经验公式拟合[J].非常规油气,2017,5(1):66-71.
[6]高文君,徐君.常用水驱特征曲线理论研究[J].石油学报,2007,28(3):89-92.
[7]王联国,高星星,兰圣武,等.镇28区长3油藏微观水驱油及影响因素研究[J].非常规油气,2017,4(2):54-59.
[8]孙学智,杜箫笙,周立娟.姬源油田可采储量标定方法探讨[J].石油地质与工程,2010,24(4):50-51.
[9]杜利,陈清华,戴胜军.应用油水相对渗透率曲线和动态数据确定水驱波及状况[J].油气地质与采收率,2003,10(4):45-46.
[10]窦宏恩.高含水期油田提高原油采收率的新理论[J].特种油气藏,2009,16(6):89-93.