drilling in complex formation
drilling in complex formation
复杂地层钻井
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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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。
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