An Environmentally-friendly Method for Removing Polymer Plugging in Well Boreholes
An Environmentally-friendly Method for Removing Polymer Plugging in Well Boreholes
复制标题
一种环保的井眼聚合物解堵方法
DOI：
10.1080/10916466.2011.615362
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发表时间：
2014-10
影响因子：
1.5
通讯作者：
Xianglong Zhuge
中科院分区：
文献类型：
--
作者：
Zhihua Wang;Xianglong Zhuge
随着大庆油田高浓度、高分子量聚合物驱工业化规模的推进，在射孔带及射孔带相邻地层的间隙处出现了严重的聚合物堵塞问题。为了去除或至少减少这些聚合物堵塞，强氧化剂在油田中被广泛使用。使用氧化剂是不可取的，因为价格高，有效期限短。更重要的是，它不符合安全和环保标准。本文介绍了这种基于微生物降解聚合物的去除聚合物塞方法的实验室和现场试验结果。室内实验结果表明，筛选的细菌在不同储层温度下均能有效降解不同分子量的聚合物。从可视化模型中可以看出，孔隙中的聚合物塞被明显去除。聚合物注入压力降低25%。大庆油田的中试结果表明，应用该方法后，每口井平均注入压力降低435 psia，平均有效期达到520天，试验田增产7000桶以上。
With the progresses of industrial scale of high concentration and high molecular weight polymer flooding in Daqing oilfield, there are severe polymer plug problems, which occur in the perforated zone and the interstices of the formation adjacent the perforated zone. In attempts to remove or at lease reduce these polymeric build-up plugs, the strong oxidants are widely used in oilfields. The use of oxidants is undesirable because of the high price and short efficient period. What is more, it cannot meet standards of safety and environmental protection. This article presents lab and field test results of this removing polymeric plug method based on microbial degrading polymer. Lab experiments results show that polymers with different molecular weights were efficiently degraded by screened bacteria under different reservoir temperatures. It can be seen in visualization model that polymer plugs in pore were removed obviously. The polymer injection pressure was decreased 25%. The pilot tests in Daqing oilfield showed that by applying the method, average injection pressure of each well was decreased 435 psia, the average effective period reached to 520 days, and more than 7,000 barrels (bbl) of oil were increased in the test field.
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DOI：
--
发表时间：
2008
期刊：
Chinese Polymer Bulletin
影响因子：
--
作者：
Bao Mu-tai
通讯作者：
Bao Mu-tai
影响因子：
--
作者：
Zhang Guang
通讯作者：
Zhang Guang
影响因子：
--
作者：
Xue Ai
通讯作者：
Xue Ai
影响因子：
1
作者：
K. Fujiwara;Tanaka Shinji;Makiko Ohtsuka;N. Ichimura;H. Yonebayashi;C. Hong;H. Enomoto
通讯作者：
K. Fujiwara;Tanaka Shinji;Makiko Ohtsuka;N. Ichimura;H. Yonebayashi;C. Hong;H. Enomoto
影响因子：
1.5
作者：
T. Nazina;A. Ivanova;G. F. Kandaurova;R. Ibatullin;S. Belyaev;M. Ivanov
通讯作者：
T. Nazina;A. Ivanova;G. F. Kandaurova;R. Ibatullin;S. Belyaev;M. Ivanov