The theoretical result is in good agreement with the experimental result, proving that FEM is an effective way to study sonic field in fluid filled borehole in the complex formation.
数值计算结果与实验结果具有很好的一致性。结果表明，有限元素法是研究复杂地层充液井孔中声场的有效工具。
METHODS By EDTA complex formation titration.
方法采用EDTA络合滴定法。
Furthermore, the reaction mechanism has been studied, and the complex formation constant between NewMagenta and DNA was obtained from the UV-Vis spectra.
同时，对该反应机理进行了探讨，并用紫外-可见光谱求出了其形成常数。
Several examples have shown that accurate evaluation of complex formation lithology changes can be achieved, providing reliable geological parameters for exploration and development.
通过实例分析，正确评价了复杂地层的岩性变化，为石油勘探开发提供了可靠的地质参数。
In this paper, through the analysis of complex formation and leakage features of adjustment well in Zhongyuan Oilfield, the result shows that antileakage is key to drill successfully adjustment well.
中原油田地层情况复杂，漏失量大，通过对中原油田调整井地层复杂情况及漏失特点的分析，认为防漏是复杂区块调整井成功的关键，主要体现在防漏技术、配方、密度、流变性能、固控、起下钻措施等方面。
But it has limitation in complex formation drilling for its natural thermal instability and high sensitivity to salt contamination, whereas tannin could he modified to widen its using fields.
因其在使用中具有不耐温、不耐盐等较多缺陷，无法适用于特殊复杂的地层，但是通过对其改性，可以拓宽其应用范围。
Complex formation titration, oxidimetry and precipitation titration were compared.
对配位滴定法，氧化还原滴定法和沉淀滴定法进行了比较。
Its structure is quite complex, fault block well developed, lithology complex, formation water salinity variable and oil zones universally exhibit low resistivity.
其油藏结构复杂、断块发育、岩性与水性复杂多变，同时油层低阻现象普遍。
Its structure is quite complex, fault block well developed, lithology complex, formation water salinity variable and oil zones universally exhibit low resistivity.
其油藏结构复杂、断块发育、岩性与水性复杂多变，同时油层低阻现象普遍。
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