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在钻井过程中,通常会遇到两种复杂情况,即由于钻凿粘土层、泥岩和泥页岩层而引起的地层水化分散造浆和钻凿含盐(如Ca~(++)、Mg~(++)、Cl~-等)地层可溶性盐类污染或高矿化度水的侵入而引起泥浆性能不稳定,均会导致泥浆稠化,影响护壁效果和钻进速度。以三聚磷酸钠作添加剂的钻井泥浆,在淮南潘三西风井和龙口梁家风井,通过相当于上述两种复杂情况的考验,证明它是一种能较全面的适应各种不同情况的稀释剂。 一、三聚磷酸钠的性质 三聚磷酸钠(又称焦偏磷酸钠)分子式为Na_5P_3O_(10),分子量367.86,白色粉末状,
In the drilling process, there are usually two complicated conditions, namely the formation of hydration due to the drilling of clay, mudstone and shale layers, and the formation of salt (eg, Ca ++, Mg). ~(++), Cl~-, etc.) The formation of soluble salt or high salinity water incurs instability in the mud, which can lead to mud thickening, affecting the effectiveness of wall protection and drilling speed. The drilling mud using sodium tripolyphosphate as an additive has proved to be a thinner that can adapt to various conditions through the test of the above two complicated conditions in the Pansan Westerbunk well and Liangkou Liangjia wind well in Huainan. . A, the nature of sodium tripolyphosphate Sodium tripolyphosphate (also known as sodium pyrophosphate) formula Na_5P_3O_ (10), molecular weight 367.86, white powder,