| 王立辉.井筒压力波动条件下钻井液侵入煤岩实验研究[J].矿产勘查,2020,11(2):384-389 |
| 井筒压力波动条件下钻井液侵入煤岩实验研究 |
| Experimental study on the invasion of drilling fluid to coal under the condition of wellbore pressure fluctuation |
| 投稿时间：2019-05-01 |
| DOI： |
| 中文关键词: 煤层气 压力波动 渗透率 滤失量 滤失速率 钻井液 |
| 英文关键词: coalbed methane,pressure fluctuation,permeability,filtration,filtration rate,drilling fluid |
| 基金项目: |
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| 摘要点击次数: 1830 |
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| 中文摘要: |
| 在煤层气储层钻井过程中,井筒压力波动容易使钻井液侵入煤岩裂缝造成储层渗透率伤害。通过室内岩芯流动实验,分别测定了井筒压力稳定和井筒压力波动条件下,不同钻井液向煤岩裂缝中的侵入量和侵入速率,认为井筒压力波动条件下的钻井液侵入量大于井筒压力稳定条件下的钻井液侵入量,且清水钻井液侵入量最大,泡沫钻井液侵入量最小。 |
| 英文摘要: |
| During the drilling process for CBM reservoir,the pressure fluctuation makes it easy for invasion of drilling fluid to the coal,and makes damage to the CBM reservoir.Through the experiments of core flow,by measuring the amount and the rate of diferent drilling fluids invading to the coal under the condition of steady wellbore pressure and fluctuant wellbore pressure,it was found that when the wellbore pressure fluctuated,the invasion amount was greater,and the amount of water invasion was up to the maximum,the amount of foam invasion was the minimum. |
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