泌深1井抗高温钻井液体系室内研究

Drilling & Production Technology(2010)

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Abstract
泌深1井是中石化重点探井,设计井深6000m。根据邻井资料,预计井底温度可达245℃。该井进入四开4500m后,深部井段泥质含量高,高温造浆、垮塌风险大,且地温梯度高,钻井液必须抗高温且抑制防塌性能好。因此,进行了大量室内实验,优选出抗高温处理剂和抗高温水基钻井液配方,经245℃/16h老化后,该配方流变性好,API滤失量4ml,摩阻系数0.074,抗15%劣土、5%NaCl和0.2%CaCl2等污染能力强,页岩回收率达到88.66%,可以满足该井深部井段地质和钻井需要。实际完钻井深6005m,完钻后钻井液停止循环24h实测井底温度236℃,创国内最高井底温度记录。
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Key words
hole stability,Henan Oilfield,high temperature resistance,BS1 well,drilling fluid,inhibitive ability
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