火山岩区断层封闭性的综合因子评价方法

发布时间：2018-05-03 16:27

本文选题：断层封闭性 + 封闭模式　；参考：《中国石油大学学报(自然科学版)》2017年04期

【摘要】：基于火山岩区地质条件和断层封闭机制,依据断面正应力法,建立压实成岩断层封闭模式,结合断层面密度差法和断层紧闭指数法,建立岩性对接断层封闭模式。在此基础上,综合考虑断面正应力、断层紧闭指数、断层面密度差以及流体系数等因素,提出火山岩区断层封闭性的综合因子评价方法,并利用该方法评价准噶尔盆地西北缘火山岩区的断层封闭性。结果表明,火山岩区断层封闭性受断层级别的控制,即断层级别越高,综合因子越大,封闭性能越好,所控制的油藏规模越大;反之,断层级别越低,综合因子越小,封闭性能越差,所控制的油藏规模越小。评价结果与实际地质情况具有良好的吻合性,表明火山岩区断层封闭性综合因子评价方法具有较好的适用性。
[Abstract]:Based on the geological conditions and fault sealing mechanism of volcanic rock area, the sealing model of compacted diagenetic fault is established according to the normal stress method of section, and the sealing model of lithologic docking fault is established by combining the density difference method of fault plane and the method of fault closure index. On this basis, considering the normal stress of the fault section, the index of fault closure, the density difference of fault plane and the fluid coefficient, a comprehensive factor evaluation method of fault sealing in volcanic rock area is put forward. This method is used to evaluate the fault sealing of volcanic rocks in northwestern margin of Junggar Basin. The results show that fault sealing in volcanic rock area is controlled by fault level, that is, the higher the fault level, the greater the comprehensive factor, the better the sealing performance, and the larger the controlled reservoir scale, whereas, the lower the fault level, the smaller the comprehensive factor. The worse the sealing performance, the smaller the scale of the controlled reservoir. The evaluation results are in good agreement with the actual geological conditions, which indicates that the comprehensive factor evaluation method of fault sealing in volcanic rock area has good applicability.
【作者单位】：中国石油大学地球科学与技术学院;海洋国家实验室海洋矿产资源评价与探测技术功能实验室;中海油湛江分公司研究院;
【基金】：国家“973”计划项目(2014CB239005) 国家科技重大专项(2017ZX05001,2016ZX05006) 山东省自然科学基金项目(ZR2013DM016)
【分类号】：P618.13

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