辽河油田海水基MMH钻井液技术

Study and application on MMH sea water drilling fluid

针对环境保护对滩涂地区及海洋钻井的特殊要求,优选出钻井液配方力5％建平土±0.3％NaOH+0.3％Na_2CO_3+0.5％海水造浆粉+0.25％MMH+0.4％NPAN(0.25％XY-27)+3％KH-931+3％SMP-Ⅱ+2％—3％RT-001+2％塑料球+3％超细碳酸钙,并对其抑制性、触变性、稳定性和毒性进行了综合评价。介绍了该钻井液在葵1-2、葵1-3、葵12和金秋2井的现场使用情况。并以葵12井为例介绍了海水基MMH钻井液的维护使用情况。结果表明,该钻井液抑制性能好,携砂能力强,可抗180℃高温,而且其中的处理剂均无毒无荧光,钻井液配制、处理方便易行。

The optimum formulation of MMH sea water drilling fluid is seeked based on the requirment of environmental protection. The inhibitor, fluid loss additive, lubricator and optimum MMH dosage are introduced. Applications in Kui 1-2 well, Kui 1-3 well, Kui 12 well, and Jinqiu 2 well indicate that this MMH sea water drilling fluid possesses the properties of good inhibition, cuttings transportation, good temperature tolerance (up to 180℃), and no toxicity to environment. Maintenance of MMH sea water drilling fluid in Kui 12 well are also introduced.