Detection of Hydraulic Fractures in Horizontal Wells Based on Shear Wave Splitting of DSI Logging

doi:10.11885/j.issn.1674-5086.2016.12.20.03

Abstract

Abstract: Many theoretical and technical challenges remain with the detection of hydraulic fractures in horizontal wells using dipole shear image (DSI) logging, which differs from the detection of hydraulic fractures in straight wells. Formulas for computing the phase velocity and coefficient of anisotropy of SH-waves and SV-waves in three-dimensional TTI media were derived for straight, inclined, and horizontal wells. The theoretical relationship between the coefficient of anisotropy of shear waves and the slope of fracture, azimuth of fracture, azimuth of borehole inclination, and angle of borehole inclination was then examined by performing a DSI experimental simulation of horizontal hydraulic fractures in horizontal wells. This was then applied to the field detection of hydraulic fractures in horizontal well QP52. The study found that DSI is capable of detecting vertical and diagonal fractures in horizontal wells, but not horizontal orthogonal fractures in horizontal wells. The coefficient of anisotropy of a shear wave decreases with increasing slope of the fracture and with increasing difference between the azimuth of the fracture and the azimuth of the borehole inclination. In addition, changes in borehole inclination have no impact on the detection and computation of splitting speed or the coefficient of anisotropy of shear waves. This study revealed that hydraulic fractures can be detected and fractured layers and sections can be identified by comparing the anisotropy of shear waves in areas adjacent to boreholes before and after fracturing. This provides important theoretical guidance and criteria for DSI logging projects involving the field detection of hydraulic fractures in horizontal wells.

Key words: DSI Logging, TTI medium, shear-wave splitting, SH-wave and SV-wave, hydraulic fracture detection, coefficient of anisotropy

CLC Number:

TE132

XIA Hongquan, GUO Qiannan. Detection of Hydraulic Fractures in Horizontal Wells Based on Shear Wave Splitting of DSI Logging[J]. 西南石油大学学报(自然科学版), 2018, 40(3): 87-96.

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References

[1] 高乐,刘媛,马劲风. 对各向异性介质中横波分裂现象的认识[J]. 西北大学学报(自然科学网络版), 2006, 4(2):1-6. GAO Le, LIU Yuan, MA Jinfeng. The acknowledge of shear-wave splitting in anisotropic media[J]. Journal of Northwest University (Natural Science Edition), 2006, 4(2):1-6.
[2] 赵军,侯克均,陈一建,等. 地层裂缝的各向异性横波传播特性实验分析[J]. 测井技术, 2010, 34(6):517-521. doi:10.3969/j.issn.1004-1338.2010.06.002 ZHAO Jun, HOU Kejun, CHEN Yijian, et al. Experimental analysis of shearing wave anisotropic propagation characteristics in fractured formation[J]. Well Logging Technology, 2010, 34(6):517-521. doi:10.3969/j.issn.10041338.2010.06.002
[3] 王猛,杨玉卿,张国栋,等. 基于交叉偶极子声波和固井质量测井评价压裂缝方法[J]. 石油地质与工程,2016,30(5):88-96. doi:10.3969/j.issn.1673-8217.2016.05.022 WANG Meng, YANG Yuqing, ZHANG Guodong, et al. Evaluating method of fracturing fractures based on cross dipole acoustic and cementing quality logging[J]. Petroleum Geology and Engineering, 2016, 30(5):88-96. doi:10.3969/j.issn.1673-8217.2016.05.022
[4] MARTINEA J R, ORTEGA A A, MCMECHAN G A. 3-D seismic modeling for cracked media:Shear-wave splitting at zero-offset[J]. Geophysics, 2000, 65(1):211-221. doi:10.1190/1.1444712
[5] BANSAL R, SEN M K. Finite-difference modeling of S-wave splitting in anisotropic media[J]. Geophysical Prospecting, 2008, 56:293-312. doi:10.1111/j.13652478.2007.00693.x
[6] 黎书琴,李忠,张白林. 利用横波分裂预测裂缝[J]. 石油地球物理勘探, 2009, 44(增1):130-134. doi:10.13810/j.cnki.issn.1000-7210.2009.s1.034 LI Shuqin, LI Zhong, ZHANG Bailin. Application of shear wave splitting to predict fracture[J]. Oil Geophysical Prospecting, 2009, 44(S1):130-134. doi:10.13810/j.cnki.issn.1000-7210.2009.s1.034
[7] 马永乾,唐波,张晓明,等. 基于横波速度差异的裂缝分布识别方法以准噶尔盆地火山岩地层为应用实例[J]. 天然气工业, 2016, 36(6):36-39. doi:10.3787/j.issn.1000-0976.2016.06.005 MA Yongqian, TANG Bo, ZHANG Xiaoming, et al. A fracture identification method based on S-wave velocity difference:A case study form the volcanic strata in the Junggar Basin[J]. Natural Gas Industry, 2016, 36(6):3639. doi:10.3787/j.issn.1000-0976.2016.06.005
[8] 李同华,段庆庆,杨雷,等. 基于偶极横波测井资料火山岩裂缝及油气识别[J]. 西南石油大学学报(自然科学版),2009,31(6):45-50. doi:10.3863/j.issn.16745086.2009.06.009 LI Tonghua, DUAN Qingqing, YANG Lei, et al. Research on volcanic rock for the fracture and oil and gas detection based on the DSI logging[J]. Journal of Southwest Petroleum University (Science &Technology Edition), 2009, 31(6):45-50. doi:10.3863/j.issn.1674-5086.2009.06.009
[9] SAVAGE M K. Seismic anisotropy and mantle deformation:What have we learned from shear wave splitting?[J]. Reviews of Geophysics, 1999, 37(1):65-106. doi:10.1029/98RG02075
[10] 祁斌,夏宏泉,房国庆,等. 基于偶极横波测井的地层各向异性研究[J]. 测井技术, 2008, 32(5):412-415, 421. doi:10.3969/j.issn.1004-1338.2008.05.006 QI Bin, XIA Hongquan, FANG Guoqing, et al. On stratum anisotropy based on DSI log information[J]. Well Logging Technology, 2008, 32(5):412-415, 421. doi:10.3969/j.issn.1004-1338.2008.05.006
[11] CRAMPIN S. A review of wave motion in anisotropic and cracked elastic-media[J]. Wave Motion, 1981, 3(4):343-391. doi:10.1016/0165-2125(81)90026-3
[12] CRAMPIN S. The new geophysics:Shear-wave splitting provides a window into the crack-critical rock mass[J]. Leading Edge, 2003, 22(6):536-549. doi:10.1190/1.1587673
[13] 赵军,付海成,张永忠,等. 横波各向异性在碳酸盐岩裂缝性储集层评价中的应用[J]. 石油勘探与开发,2005,32(5):74-77. doi:10.3969/j.issn.1004-1338.2005.02.009 ZHAO Jun, FU Haicheng, ZHONG Yongzhong, et al. Application of shear wave anisotropy in fractural carbonate reservoir evaluation[J]. Petroleum Exploration and Development, 2005, 32(5):74-77. doi:10.3969/j.issn.10041338.2005.02.009
[14] 解健健. 基于横波分裂分析的裂缝检测方法研究及应用[D]. 成都:成都理工大学, 2011. XIE Jianjian. The research and application of fracture detection methods based on shear wave splitting[D]. Chengdu:Chengdu University of Technology, 2011.
[15] 刘乐,林伟军,张海澜,等. 横向各向同性地层倾斜井中的声场模式分析[J]. 地球物理学进展, 2015, 30(2):797-804. doi:10.6038/pg20150243 LIU Le, LIN Weijun, ZHANG Hailan, et al. Mode analyses in a deviated borehole penetrating a transversely isotropic formation[J]. Progress in Geophysics, 2015, 30(2):797-804. doi:10.6038/pg20150243
[16] 李敏,刘洋. 高阶旋转交错网格有限差分方法模拟TTI介质中横波分裂[J]. 物探与化探, 2012, 36(6):934-940. doi:10.11720/wtyht.2012.6.09 LI Min, LIU Yang. Modeling of the S-wave splitting in TTI media using high-order rotated staggered grid scheme[J]. Geophysical & Geochemical Exploration, 2012, 36(6):934-940. doi:10.11720/wtyht.2012.6.09
[17] 李振春,李娜,黄建平,等. 裂缝介质横波分裂时差影响因素定量研究[J]. 地球物理学进展, 2013, 28(1):240-249. doi:10.6038/pg20130125 LI Zhenchun, LI Na, HUANG Jianping, et al. The quantity study of the factors that influence the Shear-wave splitting time in fracture media[J]. Progress in Geophysics, 2013, 28(1):240-249. doi:10.6038/pg20130125
[18] 吴国忱. 各向异性介质地震波传播与成像[M]. 北京:中国石油大学出版社, 2006:43-58. WU Guozhen. Seismic wave propagation and imaging in anisotropic media[M]. Beijing:China University of Petroleum Press, 2006:43-58.
[19] 夏宏泉,邹曦,郭倩男,等. 水平井压裂缝的测井检测技术研究[R]. 成都:西南石油大学, 2016. XIA Huanquan, ZOU Xi, GUO Qiannan, et al. Research on the fracture detection in the horizontal well by well logging technology[R]. Chengdu:Southwest Petroleum University, 2016.
[20] 周健,陈勉,金衍,等. 裂缝性储层水力裂缝扩展机理试验研究[J]. 石油学报, 2007, 28(5):109-113. doi:10.7623/syxb200705020 ZHOU Jian, CHEN Mian, JIN Yan, et al. Experimental study on propagation mechanism of hydraulic fracture in naturally fractured reservoir[J]. Acta Petrolei Sinica, 2007, 28(5):109-113. doi:10.7623/syxb200705020
[21] 牛虎林,胡欣,徐志强,等. 基岩油气藏裂缝性储层的成像测井评价及裂缝预测[J]. 石油学报, 2010, 31(2):264-269. doi:10.7623/syxb201002014 NIU Hulin, HU Xin, XU Zhiqiang, et al. Evaluation of imaging logging and fracture prediction in fractured basement reservoirs[J]. Acta Petrolei Sinica, 2010, 31(2):264-269. doi:10.7623/syxb201002014