精控压裂技术在三类薄差储层挖潜中的应用

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• 英文论文题名：The Application of Fine Controlled Fracturing Technique to Tap the Potential in the Tertiary Poor & Thin Reservoir
• 论文作者：徐丽丽 ; 刘亚三 ; 魏显峰
• 英文论文作者：Xu Lili ; Liu Yasan ; Wei Xianfeng
• 年：2016
• 作者机构：大庆油田有限责任公司第四采油厂;
• 论文关键词：三类薄差储层 ; 对应挖潜 ; 精控压裂 ; 参数优化 ; 动用程度
• 英文论文关键词：tertiary poor & thin reservoir ; tap the potential correspondingly ; fine controlled fracturing ; optimization of parameters ; producing degree
• 会议召开时间：2016-09-01
• 会议录名称：《采油工程文集》2016年第3辑
• 英文会议录名称：Oil Production Engineering
• 语种：中文
• 分类号：TE357
• 学会代码：DQGY
• 学会名称：大庆油田有限责任公司采油工程研究院
• 页数：7
• 文件大小：1027k
• 原文格式：D

摘要

三类薄差储层剩余储量大,目前动用程度较低,是油田挖潜的重点,为进一步提高三类薄差储层动用程度,提出了精控压裂技术。以储层精细描述为基础,通过油水井对应压裂,建立难动用储层的有效驱替体系。通过试验对精控压裂的精细卡段划分、单层排量、裂缝穿透比、加砂量等进行了优化。精控压裂单卡层数为1~3个层,排量为0.8~1.0m~3/min、穿透比可达16%以上、单层加砂量为7~9m~3,有效解决了常规压裂缝间干扰严重、单孔施工排量低、连通差、施工规模小的难题。现场应用表明,精控压裂采油井全井压开目的层比例为65%,高于常规压裂的50%;压裂后平均单井日增液量为47.3t,比常规压裂高28t;平均单井日增油量为8.7t,高于常规压裂3.9t,有效提高了薄差储层的动用效果。精控压裂技术为三类薄差储层改造提供有效技术支撑,具有规模推广的潜力。
The tertiary poor & thin reservoir with the abundant remaining oil reserves has been the focal target of future potential tapping, for only a few of them were produced. In order to further produce more oil and gas in the tertiary poor & thin reservoir, a fine controlled fracturing technique has been proposed. Based on the fine description of reservoir, an effective displacement system has been established for the hard-to-recover reservoir by fracturing the corresponding layers in the producers and injectors. Optimal items as finely dividing sections, flow rate in each layer, fracture penetration ratio and sand volume in the fine controlled fracturing operation were carried out through experiments. One to three layers can be taken as an unit for fine controlled fracturing; its flow rate is 0. 8~1. 0m~3/min; fracture penetration ratio is up to 16%; and sand volume added in one layer ranges 7 ~9m~3. Some problemsthat existed in conventional fracturing before have been solved, such as serious interference between the fractures,low flow rate in single hole, poor connectivity, small scale operation. Field applications showed that the proportion of fractured target layer was 65% by the fine controlled fracturing operation, which was 50% higher than that by the conventional fracturing job. The average daily fluid increment was 47. 3t per well after fracturing, while 28 t higer than the conventional fracturing; and the average daily oil increment was 8. 7t per well, while 3. 9t higer than the conventional fracturing. Therefore, the new fracturing method can effectively improve the producing effect in the poor & thin reservoir, which provides an effective technical support for stimulation in tertiary poor & thin reservoir with the great potential for promotion.

引文

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