非常规油气储层脆性指数测井评价方法研究进展
发布时间：2018-10-23 07:46
【摘要】：非常规油气储层一般都需要进行压裂改造才能获得工业产能,而岩石脆性指数测井评价是非常规油气储层压裂设计中应考虑的重要因素之一。目前国内外关于脆性指数定义众多、且计算方法各异,在关于脆性指数的测井评价方法方面更是缺少一套完整的研究方法流程。本文回顾了油气储层脆性指数的研究历程,明确了脆性指数定义的科学内涵,归纳总结了脆性指数的测井评价方法。最后以鄂尔多斯盆地长7致密油储层为例,探讨了主要的脆性指数测井评价方法计算流程及其有效性。在有纵、横波测井资料时,可利用泊-杨法直接计算岩石脆性指数。同时也可通过元素俘获测井矿物成分比值法计算脆性指数。此外基于常规测井的最优化方法确定矿物组分,利用矿物成分比值法也能计算脆性指数。通过X-射线衍射资料与岩性系数GR/Pe的回归拟合建立地区经验公式,也可实现岩石脆性指数的测井评价。最后对脆性指数测井计算中存在的问题进行归纳总结,并对未来发展方向做出展望。研究成果可为非常规油气储层钻井和压裂设计工作提供科学指导。
[Abstract]:In order to obtain industrial productivity, unconventional oil and gas reservoirs usually need fracturing reconstruction, and the evaluation of rock brittleness index logging is one of the important factors that should be considered in fracturing design of unconventional oil and gas reservoirs. At present, there are many definitions of brittleness index at home and abroad, and the calculation methods are different, and there is a lack of a complete research method flow in well logging evaluation of brittleness index. This paper reviews the research history of the brittleness index of oil and gas reservoirs, defines the scientific connotation of the brittleness index, and summarizes the logging evaluation method of the brittleness index. Finally, taking Chang7 tight oil reservoir in Ordos Basin as an example, the calculation flow and validity of main brittleness index logging evaluation methods are discussed. When the longitudinal and shear wave logging data are available, the rock brittleness index can be calculated directly by the Poor-Yang method. The brittleness index can also be calculated by the method of mineral composition ratio of elemental capture logging. In addition, the mineral components can be determined based on the optimization method of conventional logging, and the brittleness index can also be calculated by using the mineral component ratio method. Through the regression fitting of X-ray diffraction data and lithology coefficient GR/Pe, the regional empirical formula can be established, and the log evaluation of rock brittleness index can also be realized. Finally, the problems existing in the calculation of brittleness index logging are summarized, and the future development direction is prospected. The research results can provide scientific guidance for drilling and fracturing design of unconventional oil and gas reservoirs.
【作者单位】： 中国石油大学(北京)地球科学学院;中国石油大学(北京)油气资源与探测国家重点实验室;
【基金】：国家科技重大专项(2011ZX05020-008、2016ZX05019-005-007) 国家自然科学基金(41472115)联合资助
【分类号】：TE357;P631.81
，
本文编号：2288560
[Abstract]:In order to obtain industrial productivity, unconventional oil and gas reservoirs usually need fracturing reconstruction, and the evaluation of rock brittleness index logging is one of the important factors that should be considered in fracturing design of unconventional oil and gas reservoirs. At present, there are many definitions of brittleness index at home and abroad, and the calculation methods are different, and there is a lack of a complete research method flow in well logging evaluation of brittleness index. This paper reviews the research history of the brittleness index of oil and gas reservoirs, defines the scientific connotation of the brittleness index, and summarizes the logging evaluation method of the brittleness index. Finally, taking Chang7 tight oil reservoir in Ordos Basin as an example, the calculation flow and validity of main brittleness index logging evaluation methods are discussed. When the longitudinal and shear wave logging data are available, the rock brittleness index can be calculated directly by the Poor-Yang method. The brittleness index can also be calculated by the method of mineral composition ratio of elemental capture logging. In addition, the mineral components can be determined based on the optimization method of conventional logging, and the brittleness index can also be calculated by using the mineral component ratio method. Through the regression fitting of X-ray diffraction data and lithology coefficient GR/Pe, the regional empirical formula can be established, and the log evaluation of rock brittleness index can also be realized. Finally, the problems existing in the calculation of brittleness index logging are summarized, and the future development direction is prospected. The research results can provide scientific guidance for drilling and fracturing design of unconventional oil and gas reservoirs.
【作者单位】： 中国石油大学(北京)地球科学学院;中国石油大学(北京)油气资源与探测国家重点实验室;
【基金】：国家科技重大专项(2011ZX05020-008、2016ZX05019-005-007) 国家自然科学基金(41472115)联合资助
【分类号】：TE357;P631.81
，
本文编号：2288560
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