连续封隔体防止泥堵技术的应用及效果分析

doi:10.11885/j.issn.1674-5086.2020.07.03.02

摘要/Abstract

摘要： 在水平井开采过程中，常见因水平段钻遇泥岩所导致的出泥和泥堵现象，而传统封隔器封隔泥岩段应用效果差、适用性受限。调研发现了应用连续封隔体颗粒防泥堵的相关室内物理模拟实验材料。通过分析连续封隔体技术在实际生产应用中防泥窜的可行性及其防泥窜效果的影响因素，提出相应的计算方法和理论。首次实施连续封隔体防泥技术的工程应用，选取LF油田一口调整井A7H1进行连续封隔体技术完井，投产后该井产能趋势稳定，变化幅度小于4.8%，与未钻遇泥岩的邻井产能相近，米采液指数与临井平均值相差仅为2.02%，表明该技术在防泥堵方面有良好的应用效果，充分证明连续封隔体技术在防泥堵，保障水平井高效开采方面具有广阔的应用前景。

关键词: 水平井, 泥质运移, 筛管堵塞, 连续封隔体, 防泥堵

Abstract: In horizontal well drilling, mud blocking often occurs due to mudstone. The traditional packer is poor in function, and is restricked to specific condition. The laboratory physical simulation experimental materials for the application of continuous pack-off technology for anti-mud blocking are found during literature research. Though analyzing the feasibility of continuous pack-off technology for anti-mud blocking in production and factors influencing the application effect, the relative theory and computing method are proposed. The first application of continuous pack-off technology for anti-mud blocking is carried out, with an adjustment well in LF Oilfield as the first testing well. Since the well is on, the liquid productivity fluctuation is less than 4.8%. Comparing to the adjacent wells which did not drill through any mudstones, the fluid productivity index per meter is similar, only 2.02% difference to the average. All these evidences show that the technique has a great application effort on mud blocking prevention. It demonstrates that there are extensive application prospects for horizontal wells using continuous pack-off technology to prevent mud-blocking and keep efficient development.

Key words: horizontal well, mud migration, screen plugging, continuous pack-off, anti-mud blocking

中图分类号:

TE35

李锋, 李晓平, 杨勇, 刘成林, 裴柏林. 连续封隔体防止泥堵技术的应用及效果分析[J]. 西南石油大学学报(自然科学版), 2022, 44(1): 121-131.

LI Feng, LI Xiaoping, YANG Yong, LIU Chenglin, PEI Bailin. Application of Continuous Pack-off Technology in Packing-off Mudstone of Horizontal Well[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(1): 121-131.

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