| 海坨区块高效堵漏体系的优化与应用 |
| 投稿时间：2021-02-06 修订日期：2021-09-15 点此下载全文 |
| 引用本文：孙威威.海坨区块高效堵漏体系的优化与应用[J].钻探工程,2021,48(12):72-78.SUN Weiwei. Optimization and application of the efficient plugging system in the Haituo block[J]. Drilling Engineering, 2021,48(12):72-78. |
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| 中文摘要:海坨区块的地层破裂压力较低，存在大量的天然裂缝，钻井过程中极易发生渗透性漏失和失返性漏失，从而引发井壁失稳。针对海坨区块存在的严重漏失问题，制备了一种随钻堵漏纤维YTZ，同时优选出了与基浆配伍良好的复合植物纤维XA、快速封堵剂KF，提高了钻井液稳定井壁的能力。通过3种堵漏材料的复配，形成了一套适合海坨区块的堵漏体系和科学有效的施工技术，有效解决了海坨区块的各种井漏问题，确保了钻井及完井施工的顺利进行，减少了由于漏失带来的经济损失。该堵漏体系在现场应用中体现了良好的封堵效果，值得在海坨区块进一步推广应用。 |
| 中文关键词:海坨区块 井壁失稳 钻井液 堵漏剂 随钻堵漏纤维 防漏堵漏 |
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| Optimization and application of the efficient plugging system in the Haituo block |
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| Abstract:With the low formation fracturing pressure and presence of a large number of natural fractures in the Haituo block， pervious circulation loss and lost return are very easy to occur during drilling， resulting in wellbore instability. In view of serious leakage in the Haituo block， a plugging-while-drilling fiber YTZ was prepared. At the same time， the composite plant fiber Xa and the fast plugging agent KF， which are well compatible with the base slurry， were selected to improve the ability of drilling fluid to stabilize the wellbore. Through the combination of the three plugging materials， a plugging system， and proper and effective drilling technology for the Haituo block have been formed， which effectively solved various well leakage problems in Haituo block， ensured the smooth drilling and completion progress， and reduced the economic losses caused by leakage. The plugging system showed good plugging effect through field application， and is worthy of further popularization and application in the Haituo block. |
| keywords:Haituo block wellbore instability drilling fluid plugging agent plugging fiber while drilling leak prevention and plugging |
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