胜利油田罗9试1块微生物吞吐体系的性能评价及应用
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1.中国石化胜利油田分公司 石油工程技术研究院;2.中国石化胜利油田分公司

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国家高技术研究发展计划(863计划)“中高温油藏微生物驱油关键技术研究”(项目编号2013AA064401)。


Performance evaluation and application of the microbial huff and puff system for Sheng li oil field Luo 9 Shi 1 block
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Institute of Petroleum Engineering,Shengli Oilfield Company,SINOPEC,Dongying,Shandong Province

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    摘要:

    罗9试1区块存在温度高、粘度高、含水高、水驱效率低等问题。为了进步提升高含水油井的产量,研制了生物多糖+微生物复合吞吐体系,对其耐温性、封堵性、乳化降粘作用及物模驱油效果进行了研究,并在现场开展了应用。结果表明,新型生物多糖在55~95℃条件下,粘度始终保持在120~125mPa.s之间,耐温性较强;新型生物多糖注入至岩心后,压力升高5.6倍,渗透率降低53.3%,可以有效封堵岩心。当微生物发酵液Ⅰ:微生物发酵液Ⅱ=1:2时高温乳化能力最强,原油的乳化降粘率达81.4%。物模驱油实验显示,生物多糖+微生物发酵液体系可以提高采收率达13.9%,优于单一体系的驱油效果。现场5口油井的应用结果表明,4口油井取得了成功,累计增油达2730t,增油降水效果显著,而且目前继续有效,有效改善了罗9试1区块油井的低效生产状况。

    Abstract:

    Luo 9 Shi 1 block has some problems of high temperature, high viscosity, high water cut and low water flooding efficiency.In order to improve the output of high water cut oil well, the composite system of biological polysaccharide and microorganism was developed. Its temperature resistance, plugging performance, emulsion viscosity role and model of the displacement effect were studied. Finally, the composite system of huff and puff was applied in the field.The results showed that the viscosity of the new biological polysaccharide remained in the range of 120 ~ 125mPa.s at 55 ~ 95℃ and the temperature resistance was strong.When the new biological polysaccharide injected into the core, the pressure increases by 5.6 times and the permeability decreases by 53.3%, which could effectively seal the core.When the ratio of microbial fermentation liquidⅠto microbial fermentation liquidⅡwas 1:2, the high temperature emulsification ability was the strongest and the emulsification viscosity reduction rate was 81.4%. The physical simulation of oil displacement experiment showed that the composite system of biological polysaccharide and microorganism improved oil recovery by 13.9%, which was better than the single system in oil displacement. The application results of five oil Wells showed that four oil Wells had achieved success and the cumulative increase of oil amounted to 2730t. The effect of increasing oil and dewatering was significant, which continued to be effective.It effectively improved the low efficiency of oil well in Luo9 Test 1 block.

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历史
  • 收稿日期: 2022-02-22
  • 最后修改日期: 2022-04-14
  • 录用日期: 2022-04-23
  • 在线发布日期: 2022-06-07
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