基于流场强度系数的高含水油藏优势流场识别方法及应用

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英文篇名：Method of Identifying Dominant Flow Field of High Water-cut Reservoirs based on Strength Coefficient of Flow Field and Its Application 作者：张志超 英文作者：Zhang Zhichao;No.1 Oil Production Plant ,Daqing Oilfield Co.,Ltd.; 关键词：高含水油藏 ; 优势流场 ; 强度系数 ; 识别方法 ; 应用效果 英文关键词：oil reservoirs with high water cut;;dominant flow field;;strength coefficient;;identification method;;application result 中文刊名：SYZW 英文刊名：Sino-Global Energy 机构：大庆油田有限责任公司第一采油厂; 出版日期：2019-03-15 出版单位：中外能源 年：2019 期：v.24 基金：国家科技重大专项“优势渗流通道识别与表征及控制无效循环技术”(编号:2016ZX0501003-003)资助 语种：中文; 页：SYZW201903008 页数：4 CN：03 ISSN：11-5438/TK 分类号：49-52

摘要

高含水期油田油层优势流场造成连通油井高含水,不连通或连通差的油井受效程度低,严重影响该阶段油田的产量稳定,因此对该阶段油藏优势流场进行识别调整至关重要。目前优势流场识别方法如油水井动态分析、示踪剂法等,主要集中于油藏流场的定性分析,无法精细刻画油藏流场的分布状况。因此,本文提出基于流场强度系数的高含水油藏优势流场识别方法,对油藏流场分布进行精确描述,并将该方法应用于河南油田区块X的油藏流场识别和调整,绘制了研究区块的流场强度分布图,找出优势流场区,并对识别出的位于优势流场中的油水井对,进行有针对性的调层、补孔、增注等调整措施治理油水井间优势流场,使地下液流转向。调整后研究区油井平均含水量下降2.7%,全区油井日增油45t左右,优势流场治理效果明显。
        Dominant flow field of the reservoirs in the oilfield in high water cut period results in high water cut in the connected oil wells and low degree of water-flooding effect in the unconnected or little connected oil wells.It has great influence on the stable production.Therefore,it is crucial to identify and adjust the dominant flow field of the reservoir at this stage.At present,the dominant flow field identification methods,such as dynamic analysis on oil and water wells and tracer method,mainly focus on the qualitative analysis,and cannot accurately describe the distribution of the reservoir flow field.Aiming at this problem,method of identifying dominant flow field in the oil reservoir with high water cut based on flow field strength coefficient was proposed in this paper.The distribution of the reservoir flow field was described accurately and the method was applied to the identification and adjustment of the flow field of the reservoirs in the block X of Henan Oilfield.The flow field strength distribution of the study block was mapped.Finally,the dominant flow field was found out,and layer adjusting,reperforating,stimulating and other measures were taken to manage the dominant flow field in the water-oil well pairs and to make the flow turn direction.After adjustment,the average water cut of the identified oil wells in the study area decreased by 2.7 percent and the daily oil increase of the oil wells in the whole area was about 45 t and the dominant flow field was improved obviously.

引文

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