Production analysis and optimal design of explosive fracturing technology for low permeability reservoir
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摘要: 基于爆炸压裂裂缝分布规律，提出爆炸压裂缝网双重介质复合流动产能模型，应用Laplace变换Stehfest数值反演，得到了定压条件下封闭外边界低渗透油藏爆炸压裂生产井产能表达式。在模型正确性验证的基础上结合某低渗透油藏储层特征参数研究了爆炸压裂改造区域参数对封闭边界油藏产量的影响，同时对爆炸压裂改造改造体积优化设计进行了研究。研究结果表明，爆炸压裂改造区域半径主要影响生产中期产能，改造区域渗透率对生产早期和中期影响比较大，且对于实例油藏爆炸压裂改造比为0.1时效果最好。Abstract: The explosive fracturing technique is often adopted to produce and expand fractures due to its great shock waves, thus improving the low permeability of oil reservoirs. Based on the distribution characteristics of the explosive fracturing network and applying the Laplace transform and the Stehfest numerical inversion, this paper presents a new analytic mathematical production model for the complex-flow to an explosive fracturing well and obtains the formulas for the oil output under the constant pressure in different boundary conditions. On the basis of the model validation, this paper investigates the influence of the fracture network parameters on the output and the optimal design of the explosive fracturing. It is shown that the permeability of the fracture network exerts a great influence on the production. In addition, this paper offers an optimal design for explosive fracturing. The results from this study are expected to be significantly helpful for the optimal design of explosive fracturing and provide a rational design about the explosive quantity in low permeable reservoirs.
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图 2 储层压裂改造前后生产井产量对比
Figure 2. Comparison of production before and after reservoir stimulation
图 3 不同改造区域半径下油井日产量对比
Figure 3. Comparison of daily production between different reservoir stimulation region radii
图 4 不同裂缝渗透率下油井日产量对比
Figure 4. Comparison of daily production between different fracture permeabilities
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[1] 王凤琴, 廖红伟, 蒋峰华, 等.低渗油田注水能力下降原因分析及其对策研究[J].西安石油大学学报:自然科学版, 2009, 24(1):52-55. http://d.old.wanfangdata.com.cn/Periodical/xasyxyxb200901013Wang Fengqin, Liao Hongwei, Jiang Fenghua, et al.Causes and counter measures for the descend of the water injection capacity of low permeability reservoirs[J]. Journal of Xi'an Shiyou University: Natural Science Edition, 2009, 24(1):52-55. http://d.old.wanfangdata.com.cn/Periodical/xasyxyxb200901013 [2] 黄荣樽.水力压裂裂缝的起裂和扩展[J].石油勘探与开发, 1981, 8(5):62-74. http://d.old.wanfangdata.com.cn/Periodical/sydxxb200805018Huang Rongzun. Crack hydraulic fracturing cracks and the extension[J]. Petroleum Exploration and Development, 1981, 8(5):62-74. http://d.old.wanfangdata.com.cn/Periodical/sydxxb200805018 [3] 傅尤校.水力压裂裂缝的延伸与储层的连续性[J].石油学报, 1984, 5(2):55-62. http://www.cnki.com.cn/Article/CJFDTotal-SYXB198402009.htmFu Youxiao. Extension of fractures created by hydraurrac and continuity of reservoir[J]. Acta Petrolei Sinica, 1984, 5(2):55-62. http://www.cnki.com.cn/Article/CJFDTotal-SYXB198402009.htm [4] Yew C H. Mechanics of hydraulic fracturing[J]. Developments in Petroleum Science, 1997, 210(07):369-390. http://d.old.wanfangdata.com.cn/Periodical/mtxb201408041 [5] Britt L K. Optimization oil well fractures of mode rate permeability reservoir[C]//SPE Annual Technical Conference and Exhibition. Las Vegas, Nevada, 1985. https://www.onepetro.org/conference-paper/SPE-14371-MS [6] Shlyapobersky J K, Chudnovsky A K. Fracture mechanics in hydraulic fracturing[C]//US Symposium on Rock Mechanics. 1992. [7] Jeffrey R G, Zhang Xi. Mechanics of Hydraulic Fracture Growth From a Borehole[C]//Canadian Unconventional Resources and International Petroleum Conference. Calgary, Alberta, Canada, 2010. https://www.onepetro.org/conference-paper/SPE-137393-MS [8] 徐鹏, 程远方, 张晓春, 等.水泥试样爆炸压裂实验及裂纹分形评价[J].爆炸与冲击, 2011, 31(2):179-184. doi: 10.11883/1001-1455(2011)02-0179-06Xu Peng, Cheng Yuanfang, Zhang Xiaochun, et al. Fractal evaluation of explosive fracturing simulation test on cement samples[J]. Explosion and Shock Waves, 2011, 31(2):179-184. doi: 10.11883/1001-1455(2011)02-0179-06 [9] 赵志红, 郭建春.层内爆炸压裂技术原理及分析[J].石油天然气学报, 2008, 30(2):297-299. http://www.cnki.com.cn/Article/CJFDTOTAL-JHSX200802081.htmZhao Zhihong, Guo Jianchun. Experimental study on plug removal technology with self-excited oscillation[J]. Journal of Oil and Gas Technology, 2008, 30(2):297-299. http://www.cnki.com.cn/Article/CJFDTOTAL-JHSX200802081.htm [10] 程远方, 寇永强, 徐鹏, 等.水泥试样爆炸压裂模拟试验[J].中国石油大学学报:自然科学版, 2010, 34(5):69-72. http://d.old.wanfangdata.com.cn/Periodical/sydxxb201005012Cheng Yuanfang, Kou Yongqiang, Xu Peng, et al. Explosive fracturing simulation test of cement samples[J]. Journal of China University of Petroleum: Edition of Natural Science, 2010, 34(5):69-72. http://d.old.wanfangdata.com.cn/Periodical/sydxxb201005012 [11] 谢贤东.爆炸压裂后储层裂缝的渗流机理研究[D].北京: 中国石油大学, 2009. http://cdmd.cnki.com.cn/Article/CDMD-10425-2009222469.htm [12] 徐鹏, 程远方, 刘新云, 等.低渗透油气藏爆炸压裂模拟试验及裂缝分形特征[J].石油勘探与开发, 2013, 40(5):636-670. http://d.old.wanfangdata.com.cn/Periodical/syktykf201305021Xu Peng, Cheng Yuanfang, Liu Xinyun, et al. Explosive fracturing simulation experiment for low permeability reservoirs and fractal characteristics of cracks produced by explosive fracturing[J]. Petroleum Exploration and Development, 2013, 40(5):636-670. http://d.old.wanfangdata.com.cn/Periodical/syktykf201305021 [13] Grady D E, Kipp M E, Smith C S. Explosive fracture studies on oil shale[J]. Society of Petroleum Engineers Journal, 1980, 20(5):349-356. doi: 10.2118/8215-PA [14] Cui Mingyue, Shan Wenwen, Liang Jin, et al. In fracture explosive hydraulic fracturing fluid and its rhelogical study[C]//International Oil & Gas Conference and Exhibition in China. 2006. https://www.onepetro.org/conference-paper/SPE-103807-MS [15] Brown M L, Ozkan E, Raghavan R S, et al. Practical solutions for pressure transient responses of fractured horizontal wells in unconvertional reservoirs[J]. SPE Reservoir Evaluation & Engineering, 2009, 14(6):663-676. https://www.onepetro.org/journal-paper/SPE-125043-PA [16] Everdingen A F V, Hurst W. The application of the Laplace transformation to flow problems in reservoirs[J]. Journal of Petroleum Technology, 1949, 1(12):305-324. doi: 10.2118/949305-G [17] 孔祥言.高等渗流力学[M].合肥:中国科学技术大学出版社, 1999. -
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