地质勘探

阵列声波SVP技术在川南页岩气水平井裂缝识别中的应用

  • 梁旭升
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  • 中国石油川庆钻探工程有限公司,四川 成都 610000
梁旭升(1992—),男,工程师,2014年毕业于成都理工大学勘察工程与技术专业,现从事非常规油气藏评价、测井解释精细评价等工作。

收稿日期: 2024-05-14

  修回日期: 2025-02-03

  网络出版日期: 2025-06-16

基金资助

中国石油科技项目“水平井桥塞射孔高效联作关键技术现场试验”(2020F-43)

Application of array acoustic wave SVP technology in fracture identification of horizontal shale gas wells in the southern Sichuan Basin

  • LIANG Xusheng
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  • CNPC Chuanqing Drilling Engineering Co., Ltd., Chengdu, Sichuan 610000, China

Received date: 2024-05-14

  Revised date: 2025-02-03

  Online published: 2025-06-16

摘要

裂缝是油气渗流的重要通道,在页岩储层中裂缝的识别难度很大。针对川南地区五峰组—龙马溪组页岩储层的非均质性及易发育天然裂缝的特征,采用SVP裂缝处理技术,对阵列声波测井资料的信息进行识别,进而评价页岩储层裂缝发育程度。研究表明:阵列声波SVP处理结果与微地震监测事件具有很好的一致性。该技术不仅能够评价川南页岩气井裂缝发育规模,还能在一定程度上评价裂缝与页岩气井产能的相关性。通过对研究区已完成生产测试的4口井进行SVP分析,结果表明反射波系数高的井具有较高的产气能力,说明裂缝可有效沟通储层改造体积,提升单井产量。该项研究为页岩气水平井裂缝评价提供了技术支撑。

本文引用格式

梁旭升 . 阵列声波SVP技术在川南页岩气水平井裂缝识别中的应用[J]. 特种油气藏, 2025 , 32(2) : 59 -65 . DOI: 10.3969/j.issn.1006-6535.2025.02.007

Abstract

Fracture serves as the important channel for the seepage of oil and gas, and their identification within shale reservoirs presents significant challenges. Considering the heterogeneity and propensity for natural fracture development in the Wufeng Formation and Longmaxi Formation shale reservoirs of the Southern Sichuan Basin, the SVP fracture processing technology has been utilized to identify information from array acoustic wave logging data, thereby assessing the degree of fracture development in the shale reservoirs. The study shows that: The array acoustic wave SVP processing results show a strong consistency with microseismic monitoring events. This technology is capable not only of evaluating the scale of fracture development in shale gas wells in the Southern Sichuan Basin but also, to some extent, assessing the correlation between fractures and the production capacity of shale gas wells. SVP analysis was conducted on four wells in the study area that had undergone production test, and the results indicated that wells with high reflection wave coefficients had higher gas production capabilities. This indicates that fractures can effectively communicate the reservoir modification volume, thereby enhancing the output of single wells. This study provides technical support for the evaluation of fractures in horizontal shale gas wells.

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