发明名称 |
POLYSACCHARIDE FLUID FOR TREATMENT OF NEARWELLBORE AREA AND METHOD FOR TREATMENT OF SUBTERRANEAN STRATUM |
摘要 |
FIELD: oil and gas industry.SUBSTANCE: invention is related to treatment of nearwellbore area applied for treatment of subterranean stratum crossed by the well bore. Fluid for treatment of nearwellbore area and method for treatment of subterranean stratum crossed by the well bore contains aquatic environment; diutan polysaccharide with a repeating tetrasaccharide unit in the main polymer chain, peroxide gel liquefier reacting with diutan; gel liquefaction accelerator or at least one catalyst selected from ferric sulfates (II) and its hydrates, ferrous chloride (II), iron powder with pH control agent and combination of the above materials; and agent controlling iron contamination of the stratum. Method for treatment of subterranean stratum crossed by the well bore includes injection of the above fluid intended for treatment of nearwellbore area through the well bore to the stratum. Invention is developed in dependent claims.EFFECT: facilitation of polymer-containing fluids removal within the wide range of temperatures.13 cl, 14 ex, 15 dwg |
申请公布号 |
RU2530801(C2) |
申请公布日期 |
2014.10.10 |
申请号 |
RU20090128722 |
申请日期 |
2009.07.24 |
申请人 |
SHLJUMBERGER TEKNOLODZHI B.V. |
发明人 |
LI LEHJMIN;BONI KERTIS L;KHEHNZIK KOUDI;LIN' LITSZJUN';ALI SAID;BUSTOS OSKAR |
分类号 |
C09K8/524;C09K8/588;E21B43/22 |
主分类号 |
C09K8/524 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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