
第43卷第4期
石油与天然气化工
CHEMICAL ENGINEERING OF OIL & GAS 树脂型压并液研究及应用
房炎伟杨嘉伟马玉梁庆林(中国石油西部钻探工程有限公司)
摘要树脂型压井液是一种无固相液体,体系中自由水被高吸水性树脂束缚而呈颗粒状冻
胶状态,具有良好的储层保护效果。压并液中冻胶粒径大,有一定的强度,可变形,易流动,在压力作用下,冻胶颗粒在储层表面形成封堵层,阻止液体向地层中渗透。室内研究表明,树脂型压井液具有较好的储层保护功能。在现场施工中,树脂型压并液性能稳定,滤失量低,携砂性强,与地层水配伍性良好。在低压井的应用中没有发生漏失,修并后返排时间短,返排液含水率低,进入正常生产流程后,产液量提高,有利于修井后产能的恢复。
关键词压井液树脂储层保护应用
中图分类号:TE357.1
文献标志码:A
D0I:10.3969/j.issn.1007-3426.2014.04.019
Fang Yanwei,Yang Jiawei ,Ma Yuliang , Miao Qinglin
(CNPC XibuDrilling Engineering CompanyLimited,Shanshan 838200,XinjiangChina) Abstract : Resin type well control fluid is a solid-free liquid , and the liquid looks like jelly be-cause the free water of system is trapped by high absorbent resin , so that it has good reservoii protection . The jelly has big particle size and a certain strength , as well it is deformable and easy to flow, so it covers the reserve surface and prevents water leakage . The laboratory study dem-onstrates that the well control fluid has good reserve protection ability . In site construction ,the well control fluid has stable performance, low filter loss, strong carry capacity, and good com-patibility with formation water . The application of low pressure well show s it is useful in preven -ting leakage and reducing backflow time . The moisture content of outlet liquid is low , and the liquid production increases after entering the normal production process . It is advantageous to the productivity recovery .
Key words:well control fluid, resin,reservoir protection,application
进入开发中后期的油气田,储层能量可能严重不足,在油气井的检泵、转抽、修井等各种增产措施作业施工中,就可能引起严重漏失的情况,特别在衰竭地层的修井过程中,滤液的深侵入、恶性漏失现象普遍;而在某些存在多压力层系的地区将会出现窄安全密度窗口或无安全密度窗口的情况,施工中表现为高压层压不住,低压层蒲失严重2。漏失的压井液或使用清水压井时会引起储层水敏、水锁等
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伤害,导致储层渗流能力下降,油气井产液、产油气能力下降及含水上升。某些井即使产量恢复也需要一个较长周期,造成油气井减产。针对目前低压、多压力层系压井修井难题,研制了树脂型压井液。树脂型压并液体系颗粒状冻胶状态,冻胶粒径大,有一定强度,在压差作用下,冻胶颗粒变形贴服于井壁,不会进入储层,可以起到隔离的效果[3-4}。由于冻胶颗粒与并壁的亲和力小,作业结束后树脂型压
作者简介:房炎伟(1977一),工程师。2006年中国石油大学(华东)硕士毕业,现在西部钻探有限公司从事油田化学品的研究与应用工作。地址:(838202)新疆部善火车站镇西部钻探钻井工程技术研究院。E-mail:fyfy2000@sina.com。电话: 0995-15026258241。