The invention relates to a method for identifying a high water consumption channel in an ultra-high water cut reservoir, belonging to the technical field of petroleum exploitation. The method for identifying high water consumption channel in ultra-high water cut reservoir includes the following steps: drawing permeability differential distribution map and cumulative production and injection map of oil and water wells; determining high water consumption zone between oil wells and water injection wells whose ratio of cumulative water production to cumulative water injection is greater than set value d according to cumulative production and injection map of oil and water wells; utilizing production and water absorption profile of oil wells and water injection wells with high water consumption zone; According to the data, it is recognized that the ratio of water production to total water production of oil wells is greater than the set value E and the ratio of water absorption to total water absorption of water injection wells is greater than the set value f, which is a high water consumption channel located between the said oil wells and water injection wells. The invention first proposes a method for identifying high water consumption channels, which can take purposeful measures against high water consumption channels, reduce the cost of water drive development and improve the efficiency of water drive development.
【技术实现步骤摘要】
一种特高含水油藏高耗水通道的识别方法
本专利技术涉及一种特高含水油藏高耗水通道的识别方法,属于石油开采
技术介绍
目前国内大部分油田都已进入特高含水(含水>90%)开发期,与中高含水(含水60%-90%)阶段对比,特高含水期单井产油量低、高含水井比例大、剩余油分布复杂零散,油藏注水开发效益较差。在实际油藏中,受储层非均质性的影响,注入水在平面和纵向上沿着高渗透段发生突进,导致油井过早见水,含水快速上升,水油比急剧增加,形成注水低效无效循环的高耗水通道。注入水在注入端注入,在采油端直接采出,没有起到驱油的效果,同时大大增加了运行成本,根据矿场实践统计结果,随含水上升,运行成本逐渐增加,含水达到96%以前,水油比缓慢上升,运行成本上升幅度较小;含水大于96%后,水油比呈直线上升,运行成本非线性增加,含水每上升0.5%,运行成本增加172-237元/吨,因此在目前低油价、特高含水条件下,高耗水通道的存在是制约油藏效益开发的主要因素。现有技术中采取注入示踪剂、数值模拟技术、模糊综合评判方法等对高耗水通道进行识别,但示踪剂只能从平面上判断油水井之间的对应关系,无法从纵向上确定高耗水通道的具体层位,数值模拟技术的计算结果准确性依赖于初始模型及历史拟合的精度,模糊综合评判方法所需参数较多,且判定过程具有一定的主观性。
技术实现思路
本专利技术的目的在于提供一种特高含水油藏高耗水通道的识别方法,为解决特高含水油藏水驱开发效率低的问题奠定基础。为实现上述目的,本专利技术的技术方案是:一种特高含水油藏高耗水通道的识别方法,包括以下步骤:1)根据油水井动静态资料绘制 ...
【技术保护点】
1.一种特高含水油藏高耗水通道的识别方法,其特征在于,包括以下步骤:1)根据油水井动静态资料绘制渗透率级差分布图、油水井累产累注图;2)根据油水井累产累注图确定累产水量与累注水量的比值大于设定值d的油井与注水井之间存在高耗水带;3)利用具有高耗水带的油井与注水井的产液剖面数据、吸水剖面数据,识别产水量占油井总产水量的比值大于设定值e且吸水量占注水井总吸水量的比值大于设定值f的层位,该层位位于所述油井与注水井之间的部分即为高耗水通道。
【技术特征摘要】
1.一种特高含水油藏高耗水通道的识别方法,其特征在于,包括以下步骤:1)根据油水井动静态资料绘制渗透率级差分布图、油水井累产累注图;2)根据油水井累产累注图确定累产水量与累注水量的比值大于设定值d的油井与注水井之间存在高耗水带;3)利用具有高耗水带的油井与注水井的产液剖面数据、吸水剖面数据,识别产水量占油井总产水量的比值大于设定值e且吸水量占注水井总吸水量的比值大于设定值f的层位,该层位位于所述油井与注水井之间的部分即为高耗水通...
【专利技术属性】
技术研发人员:李洪生,方越,钟玉龙,黎锡瑜,熊英,张连锋,苏剑红,吕孝威,
申请(专利权)人:中国石油化工股份有限公司,中国石油化工股份有限公司河南油田分公司勘探开发研究院,
类型:发明
国别省市:北京,11
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