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Inversion of marine in-situ stress of northeast Sichuan and its influence on horizontal well completion optimization

机译：川东北海地应力反演及其对水平完井优化的影响

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摘要

In-situ stress plays an important role in keeping borehole stability and designing the appropri-ate completion technique. Ultra-deep horizontal wells are adopted to exploit marine carbonate gas reservoirs in northeast Sichuan, which are sour gas reservoirs with high sulfur content. To recommend the appropriate completion method for horizontal well in sour gas fields in northeast Sichuan, in-situ stress should be precisely gained at first. Based on care in method and induced facture method, imaging logging data of 16 wells was used to determine the stress direction. Statistical results indicated that the maximum horizontal principal stress extended nearly east-westward. Rock mechanical parameters were calculated from density logging and cross-dipole acoustic logging data based on the relationship between rock strength and acoustic slowness. Layering earth stress calculation model combined with imaging logging data and well stability information during drilling were used to calculate magnitude of in-situ stress of marine reservoir. Then, the influence of marine in-situ stress on horizontal borehole stability during production was studied, which gave an insight on ultra-deep horizontal wellbore completion optimization in northeast Sichuan.
机译：地应力在保持井眼稳定性和设计适当的完井技术中起着重要作用。采用超深水平井开采川东北海相碳酸盐岩气藏，即硫含量高的酸性气藏。为了为川东北地区的酸性气田水平井推荐合适的完井方法，首先应精确获得地应力。在细心护理法和诱导压裂法的基础上，利用16口井的成像测井资料确定应力方向。统计结果表明，最大水平主应力向近东方向延伸。根据岩石强度和声波慢度之间的关系，根据密度测井和交叉偶极声波测井数据计算出岩石力学参数。利用分层地应力计算模型，结合成像测井数据和钻井过程中的井稳性信息，计算出海洋水库的地应力大小。然后，研究了海洋地应力对生产过程中水平井眼稳定性的影响，为川东北超深水平井眼完井优化提供了见识。

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  • 来源
    《Rock stress and earthquakes.》|2010年|p.327-332|共6页
  • 会议地点 Beijng(CN);Beijng(CN)
  • 作者

    Kai Lan; Mingguo Liu; Youming Xiong; Kuangxiao Liu;

  • 作者单位

    Sinopec Zhongyuan Drilling Engineering Technology Institute, Puyang, Henan, China;

    Sinopec Zhongyuan Drilling Engineering Technology Institute, Puyang, Henan, China;

    Southwest Petroleum University, Chengdu, Sichuan, China;

    Sinopec Research Institute of Petroleum Engineering, Beijing, China;

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  • 正文语种
  • 中图分类 地震学;地震学;地震学;
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