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DOI:
地质力学学报:1999,5(1):40-46
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井眼附近地应力分布的三维数值模拟
(1.中国地震局地质研究所, 北京 100029;2.大庆石油管理局测井公司, 黑龙江大庆 163000)
NUMERICAL SIMULATION OF STRESS AROUND BORE HOLE
(1.Institute of Geology, CSB, Beijing 100029;2.Well Logging Co. of Daqing PAB, Daqing Heilongjiang 163000)
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投稿时间:1998-04-12    
中文摘要: 该文研究的井眼附近地应力分布包括了钻井前、后两种截然不同的应力状态。以大庆外围某油田为例,用三维有限单元方法,施以适当的边界力,模拟计算出原地应力场,即钻井前地应力分布特征,其大小、方向均与中国东部实测应力场一致。在此基础上,根据井径a与井心距r同比例放大或缩小时应力计算结果不变的规律,采取了扩大井口半径的手段,计算钻井后井口附近的应力场变化特征,其规律与观测到的井眼崩落结果十分一致。
Abstract:In this paper, the distribution of in-situ stress and the changed stress field after boring are studied. By use of three-dimensioal FEM and a adaptive boundary load, an outlying oil field of Daqing is modeled as an example. The results, including stress direction, the relationslip between stress and depth, are coincident with measured in-situ stress of East China. Then we get a rule that with the same ratio of radius and the distance from hole center, the calculated stresses are same. Based upon these, we enlarged hole radius and use 3-D FEM to calculate the stress around borehole. The changed stress field is coincident with the observed collapse of bore hole.
文章编号:     中图分类号:O242.21    文献标志码:
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引用文本:
刘洁,宋惠珍,汪于杰,等,1999.井眼附近地应力分布的三维数值模拟[J].地质力学学报,5(1):40-46.DOI:
Liu Jie,Song Huizhen,Wang Yujie,et al,1999.NUMERICAL SIMULATION OF STRESS AROUND BORE HOLE[J].Journal of Geomechanics,5(1):40-46.DOI:

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