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Impact of the geological structure on pulsating hydraulic fracturing

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Abstract

In order to study the impact of the geological structure on pulsating hydraulic fracturing (PHF), the industrial experiments of PHF were carried out in the tectonic zone and the non-tectonic zone, and then, the differences of PHF process and effect were analyzed. The results show that the fault structure brings out a weak surface in the area of PHF, easily inducing the seam crack extension to the fault, and pulsating water constantly moves to the direction of fault. Pulsating injection time and injection quantity of PHF in the tectonic zone are significantly larger than that in the non-tectonic zone, producing large water blocking effect to gas drainage and hindering gas migration dynamics. There is a natural relief area existing in the fault so that the pulsating pressure of PHF cannot be increased, reducing the effect of PHF. Geological structure reduces the increment of the stable gas concentration and improves the initial gas concentration before and after PHF.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (No. 51474211 and No. 51274195), the Natural Science Foundation of Jiangsu Province (No. BK2012571), the National Major Scientific Instrument and Equipment Development Project (No. 2013YQ17046309), which is greatly acknowledged.

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Authors and Affiliations

  1. State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China

    Ni Guanhua

  2. College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, 266590, China

    Ni Guanhua

  3. Faculty of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116, China

    Lin Baiquan & Zhai Cheng

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  1. Ni Guanhua
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  2. Lin Baiquan
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  3. Zhai Cheng
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Correspondence to Ni Guanhua.

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Guanhua, N., Baiquan, L. & Cheng, Z. Impact of the geological structure on pulsating hydraulic fracturing. Arab J Geosci 8, 10381–10388 (2015). https://doi.org/10.1007/s12517-015-2012-3

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  • DOI: https://doi.org/10.1007/s12517-015-2012-3

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