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| 不同地应力场对大斜度井井壁稳定规律的影响 | |
| 引用本文： | 张文波,周鹏高,李亚双,熊旭东,康毅力. 不同地应力场对大斜度井井壁稳定规律的影响[J]. 天然气技术, 2010, 4(1): 58-60 |
| 作者姓名： | 张文波 周鹏高 李亚双 熊旭东 康毅力 |
| 作者单位： | 1. 油气藏地质及开发工程国家重点实验室,西南石油大学,四川,成都,610500;中国石油新疆油田分公司,新疆,克拉玛依,834000 2. 中国石油新疆油田分公司,新疆,克拉玛依,834000 3. 油气藏地质及开发工程国家重点实验室,西南石油大学,四川,成都,610500 |
| 摘 要： | 大斜度井由于井斜角大，其井周应力状态和井壁稳定规律与直井有明显的差别。分析了大斜度井井周应力，并采用修正的Lade准则研究了不同地应力场对大斜度井井壁稳定的影响。结果表明，大斜度井井壁稳定受地应力场和井眼轨迹的影响，不同地应力场中和不同井眼轨迹条件下井壁稳定规律不同。大斜度井井壁坍塌方位与井眼轨迹和地应力场的特征有关，其规律较为复杂；对于水平井，井壁坍塌方位呈90／270°或0／180°对称出现。 |
| 关 键 词： | 大斜度井 井壁稳定 坍塌压力 地应力场 井眼轨迹 |
Effect of Borehole Stability in Highly Deviated Wells under Different In-situ Stress Fields |
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| ZHANG Wen-bo,ZHOU Peng-gao,LI Ya-shuang,XIONG Xu-dong,KANG Yi-li. Effect of Borehole Stability in Highly Deviated Wells under Different In-situ Stress Fields[J]. NATURAL GAS TECHNOLOGY, 2010, 4(1): 58-60 | |
| Authors: | ZHANG Wen-bo ZHOU Peng-gao LI Ya-shuang XIONG Xu-dong KANG Yi-li |
| Abstract: | A highly deviated well is characterized by a large deviate angle. So, its stress around well and borehole stability are different from those in a vertical well. In this paper, surrounding-wall stress of the highly deviated well is studied, and an effect of different in-situ stress fields on borehole stability is analyzed by modified Lade criterion. It is indicated that: (1) the stability is impacted by both in-situ stress field and well trajectory; (2) there is different stability rules in different stress ... |
| Keywords: | highly deviated well borehole stability collapse pressure in-situ stress field well trajectory |
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