Optimization of unlimited stage fracturing technology for horizontal wells in continental shale formation

被引：0
|
作者：
Tang J. [1 ,2 ]
Zhang Z. [1 ,2 ]
Zhang F. [3 ]
Li Y. [4 ,5 ]
Liu T. [1 ,2 ]
机构：
[1] School of Ocean and Earth Science, Tongji University, Shanghai
[2] State Key Laboratory of Marine Geology, Tongji University, Shanghai
[3] College of Civil Engineering, Tongji University, Shanghai
[4] School of Environment, Liaoning University, Liaoning, Shenyang
[5] Institute of Unconventional Oil and Gas, Northeast Petroleum University, Heilongjiang, Daqing
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2023年 / 42卷 / 09期
基金：
中国国家自然科学基金;
关键词：
bedding plane; continental shale; fracturing technology; induced stress; lattice method; rock mechanics;
D O I：
10.13722/j.cnki.jrme.2022.1230
中图分类号：
学科分类号：
摘要：
Compared with the traditional fracturing technologies，the recently developed unlimited stage sliding-sleeve fracturing has been proved to have many advantages during unconventional development，including uniform stimulated reservoir volume and unlimited stages. However，the controlling factors of fracture propagation and induced stress distribution of the unlimited stage fracturing have not been fully understood. For this reason，taking a continental shale formation as an example，the multi-fracture propagation models are established based on the discrete lattice method. By comparing the fracture morphology of perforation fracturing and unlimited staged fracturing under different conditions(continental shale lithology，bedding dimensional parameters，and fracturing engineering parameters) ， the qualitative and quantitative analyses can be performed concerning the fracture propagation law of unlimited stage fracturing. The research results show that the complex lithology，developed bedding interfaces，and the stress shadow effect are responsible for uneven fracture propagation regarding the multistage perforation fracturing. The bedding plane aperture，bedding density and vertical distance between bedding plane and wellbore would affect the propagation law of perforated fractures in continental shale formation，resulting in the difference in the stimulated volume of each cluster. In contrast，the unlimited stage fracturing can not only neglect the influence of the bedding interfaces，but also form more effective fractures and more uniform reservoir stimulated volume. The positive effect of unlimited stage fracturing can be strengthened depending on the lithology，cluster design，pumping rate and geometry of initial fractures. The stimulation effect of unlimited stage fracturing would get weakened under conditions of large cluster spacing，high pumping rate，and large radius of initial cluster. The magnitude and the distribution of the induced stress along the wellbore direction vary between the two technologies. For unlimited stage fracturing，the induced stress field of the former clusters will overlap and influence the following fracturing work. The research outcomes can provide theoretical support and technical guidance for the optimization of the fracturing technologies of continental shale formation. © 2023 Academia Sinica. All rights reserved.
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页码：2096 / 2108
页数：12
相关论文
共 39 条
  • [1] WANG Yaojia, WANG Zaixing, LI Yunfeng, A new technology of coiled-tubing multistage unlimited fracturing[J], Sino-global Energy, 3, pp. 48-52, (2016)
  • [2] LEI Qun, Yun XU, CAI Bo, Et al., Progress and prospects of horizontal well fracturing technology for shale oil and gas reservoirs[J], Petroleum Exploration and Development, 49, 1, pp. 166-172, (2022)
  • [3] JIANG Tingxue, WANG Haitao, BIAN Xiaobing, Et al., Volume fracturing technology for horizontal well and its application[J], Lithologic Reservoirs, 30, 3, pp. 1-11, (2018)
  • [4] ZHOU Dehua, JIAO Fangzheng, JIA Changgui, Et al., Large-scale multi-stage hydraulic fracturing technology for shale gas horizontal well JY1HF[J], Petroleum Drilling Techniques, 42, 1, pp. 75-80, (2014)
  • [5] MAO S, ZHANG Z, CHUN T，, Et al., Field-scale numerical investigation of proppant transport among multicluster hydraulic fractures[J], SPE Journal, 26, pp. 307-323, (2021)
  • [6] Lin LEI, ZHANG Longsheng, XIONG Wei, Et al., Multi-stage fracturing technology of normally pressured shale gas in horizontal wells in the Wulong Block[J], Petroleum Drilling Techniques, 47, 1, pp. 76-82, (2019)
  • [7] XIA Haibang, BAO Kai, WANG Rui, Pilot test of new infinite stage and full-bore sliding sleeve fracturing technology in shale gas wells[J], Petroleum Reservoir Evaluation and Development, 11, 3, pp. 390-394, (2021)
  • [8] TANG Ying, TANG Xuan, WANG Guangyuan, Et al., Summary of hydraulic fracturing technology in shale gas development[J], Geological Bulletin of China, 30, 2/3, pp. 393-399, (2011)
  • [9] ZHANG Daopeng, Ming XIE, LI Bing, Et al., Application of stage fracturing tool for casing sliding sleeve of infinite stage[J], Drilling and Production Technology, 43, 4, pp. 82-84, (2020)
  • [10] DONG Yunlong, TANG Shizhong, NIU Yanhua, Et al., Problems and measurements of sliding sleeve staged fracturing completion in casing cementing horizontal wells[J], Oil Drilling and Production Technology, 35, 1, pp. 28-30, (2013)
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