Special Oil & Gas Reservoirs >

2024 , Vol. 31 >Issue 3: 52 - 60

DOI: https://doi.org/10.3969/j.issn.1006-6535.2024.03.007

Geologic Exploration

Study on Response Mechanism and Brittle Evaluation of RockFracture Acoustic Emission Signals Based on Wavelet Packet Decomposition

  • Wei Jingyi
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  • Southwest Petroleum University, Chengdu, Sichuan 610500, China

Received date: 2024-03-28

  Revised date: 2024-04-14

  Online published: 2024-07-26

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Abstract

Rock brittleness is a key indicator controlling rock fracturing, determining the formation of an effective fracture network during fracturing. Studying the characteristics of rock brittleness and fracturing behavior through acoustic emission signals can directly reveal the relationship between rock fracturing and brittleness. However, the relationship between acoustic emission signal characteristics and rock fracturing patterns has not yet been established, making it difficult to accurately determine the brittleness characteristics of rocks. Therefore, based on the wavelet packet decomposition method, this study divides rock acoustic emission signals by energy frequency bands and builds the relations between different brittle rock fracturing patterns and the energy distribution of acoustic emission signals. Through the analysis of the three-dimensional spatial distribution characteristics of acoustic emission signals, a rock brittleness index evaluation method based on the energy distribution of acoustic emission signals is proposed. The study shows that the energy characteristics of acoustic emission signals are related to rock brittleness, with the main frequency of energy distribution mostly below 750 kHz. The higher the content of brittle minerals in the rock, the larger the proportion of energy signals,the more concentrated the energy distribution of rock fracturing acoustic emission signals, the stronger the mutability of rock fracturing, the more apparent the transition between fracture tension, shearing, and mixed evolutionary expansion modes, and the greater the brittleness index. The results can provide reference and guidance for research on rock fracturing warning and other related aspects.

Key words： acoustic emission signals; wavelet packet decomposition; rock fracturing; brittleness evaluation

Cite this article

Wei Jingyi . Study on Response Mechanism and Brittle Evaluation of RockFracture Acoustic Emission Signals Based on Wavelet Packet Decomposition[J]. Special Oil & Gas Reservoirs, 2024 , 31(3) : 52 -60 . DOI: 10.3969/j.issn.1006-6535.2024.03.007

References

[1] 周忠亚.纹层型页岩油储层裂缝扩展机理及工艺对策[J].特种油气藏,2023,30 (6): 141-149.
ZHOU Zhongya.Mechanism of fracture extension and process countermeasures in grain-type shale oil reservoirs[J].Special Oil & Gas Reservoirs,2023,30(6):141-149.
[2] 张矿生,薛小佳,陶亮,等.页岩油水平井体积压裂缝网波及体积评价新方法及应用[J].特种油气藏,2023,30(5):127-134.
ZHANG Kuangsheng,XUE Xiaojia,TAO Liang,et al.New method for evaluating the volume fracturing fracture network sweep volume in shale oil horizontal wells and its application[J].Special Oil & Gas Reservoirs,2023,30(5):127-134.
[3] 郭天魁,张士诚,葛洪魁.评价页岩压裂形成缝网能力的新方法[J].岩土力学,2013,34(4):947-954.
GUO Tiankui,ZHANG Shicheng,GE Hongkui.A new method for evaluating the ability of shale fracturing to form fracture network[J].Rock and Soil Mechanics,2013,34(4):947-954.
[4] 李庆辉,陈勉,金衍,等.页岩气储层岩石力学特性及脆性评价[J].石油钻探技术,2012,40(4):17-22.
LI Qinghui,CHEN Mian,JIN Yan,et al.Rock mechanical properties and brittleness evaluation of shale gas reservoir[J].Petroleum Drilling Techniques,2012,40(4):17-22.
[5] 张军,艾池,李玉伟,等.基于岩石破坏全过程能量演化的脆性评价指数[J].岩石力学与工程学报,2017,36(6):1326-1340.
ZHANG Jun,AI Chi,LI Yuwei,et al.Brittleness evaluation index based on energy variation in the whole process of rock failure[J].Chinese Journal of Rock Mechanics and Engineering,2017,36(6):1326-1340.
[6] SERRANO E P,FABIO M A.Application of the wavelet transform to acoustic emission signals processing[J].IEEE Transactions on Signals Processing,1996,44(5):1270-1275.
[7] LI Y W,JIA D,RUI Z H,et al.Evaluation method of rock brittleness based on statistical constitutive relations for rock damage[J].Journal of Petroleum Science and Engineering,2017,153(5):123-132.
[8] 张冰.松辽盆地北部页岩储层地质评价及关键技术研究[J].特种油气藏,2022,29(5):72-79.
ZHANG Bing.Study on geological evaluation and key technologies for shale reservoir in the northern Songliao Basin[J].Special Oil & Gas Reservoirs,2022,29(5):72-79.
[9] LI Yuwei,YANG Shuai.Experimental of hydraulic fracture propagation using fixed-point multistage fracturing in a vertical well in tight sandstone reservoir[J].Journal of Petroleum Science and Engineering,2018,171:704-713.
[10] 何聪,苏奥,吉李明,等.SP测井小波变换在单井层序划分中的应用[J].特种油气藏,2015,22(6):14-18.
HE Cong,SU Ao,JI Liming,et al.Application of SP logging wavelet transform in single well sequence division[J].Special Oil & Gas Reservoirs,2015,22(6):14-18.
[11] LI Yuwei,LONG Min,TANG Jizhou,et al.A hydraulic fracture height mathematical model considering the influence of plastic region at fracture tip[J].Petroleum Exploration and Development,2020,47(1):184-195.
[12] 黄忠桥,康义逵.应用声发射资料计算地应力的方法[J].特种油气藏,2003,10(4):4-7.
HUANG Zhongqiao,KANG Yikui.Calculate earth stress by acoustic data[J].Special Oil & Gas Reservoirs,2003,10(4):4-7.
[13] WANG Tingting,ZHANG Tao,RANJITH P G,et al.A new approach to the evaluation of rock mass rupture and brittleness under triaxial stress condition[J].Journal of Petroleum Science and Engineering 2020,184:106482.
[14] 谢和平,彭瑞东,鞠杨.岩石变形破坏过程中的能量耗散分析[J].岩石力学与工程学报,2004,23(21):3565-3570.
XIE Heping,PENG Ruidong,JU Yang.Energy dissipation of rock deformation and fracture[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(21):3565-3570.
[15] ZHAO Wanchun,GE J,RANJITH P G,et al.An approach to calculating casing bearing capacity with parabolic deformation characteristics under local radial loading[J].Energies,2020,13(7):1769.
[16] LI Yuwei,RUI Zhenhua.Study on the mechanism of rupture and propagation of T-type fractures in coal fracturing[J].Journal of Natural Gas Science and Engineering,2018,52:379-389.
[17] 李莉,张兴勇,秦俐,等.储层改造三维物理模拟实验研究与应用[J].特种油气藏,2021,28(2):112-119.
LI Li,ZHANG Xingyong,QIN Li,et al.Study and application of 3D physical modeling experiment of reservoir stimulation[J].Special Oil & Gas Reservoirs,2021,28(2):112-119.
[18] 姚旭龙,张艳博,刘祥鑫,等.岩石破裂声发射关键特征信号优选方法[J].岩土力学,2018,39(1):375-384.
YAO Xulong,ZHANG Yanbo,LIU Xiangxin,et al.Optimization method for key characteristic signal of acoustic emission in rock fracture[J].Rock and Soil Mechanics,2018,39(1):375-384.
[19] ZHAO Wanchun,GE Jing,GAMAGE R P,et al.Study of deformation law of casing local lateral collapse based on the principle of virtual work[J].Energies,2019,12(19):3717.
[20] 高保彬,李回贵.基于声发射参量的煤样损伤模型研究[J].防灾减灾工程学报,2014,34(1):101-106.
GAO Baobin,LI Huigui.Research on coal samples damage model based on acoustic emission parameters[J].Journal of Disaster Prevention and Mitigation Engineering,2014,34(1):101-106.
[21] KIM E Y,LEE Y J,LEE S K.Heath monitoring of a glass transfer robot in the mass production line of liquid crystal display using abnormal operating sounds based on wavelet packet transform and artificial neural network[J].Journal of Sound and Vibration,2012,311(14):3412-3427.
[22] 王妍妍,王卫红,胡小虎,等.基于脉冲注入理论的页岩储层微破裂试井解释技术及应用[J].石油与天然气地质,2022,43(1):241-250.
WANG Yanyan,WANG Weihong,HU Xiaohu,et al.Mini-frac test interpretation for shale reservoirs based on impulse injection theory and its application[J].Oil & Gas Geology,2022,43(1):241-250.
[23] 任岚,蒋豪,赵金洲,等.考虑井筒变形的深层射孔井岩石破裂压力计算模型[J].大庆石油地质与开发,2022,41(6):64-73.
REN Lan,JIANG Hao,ZHAO Jinzhou,et al.Calculation model of breakdown pressure in deep perforated wells considering wellbore deformation[J].Petroleum Geology & Oilfield Development in Daqing,2022,41(6):64-73.
[24] 李鹏,熊健,晏奇,等.准噶尔盆地玛湖凹陷二叠系风城组岩性对岩石力学特性的影响[J].石油实验地质,2022,44(4): 569-578.
LI Peng,XIONG Jian,YAN Qi,et al.Lithological influences to rock mechanical properties of Permian Fengcheng Formation in Mahu Sag,Junggar Basin[J].Petroleum Geology & Experiment,2022,44(4):569-578.
[25] 廖新武,谢润成,周文,等.古地貌对渤海湾盆地B区块太古宇暴露型潜山变质岩风化带储层裂缝发育的影响[J].石油与天然气地质,2023,44(2):406-417.
LIAO Xinwu,XIE Runcheng,ZHOU Wen,et al.The effects of paleogeomorphology on the development of fractures in reservoirs of weathering metamorphic zone in an exposed Archean burial hill,Block B,Bohai Bay Basin[J].Oil & Gas Geology,2023,44(2):406-417.
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