STUDY ON SEISMIC PROPERTY OF CRACK-INCLUDED PHYSICAL MODEL

ZHAO Wei-hua; WEI Jian-xin; SUN Dong-sheng; LI A-wei; WANG Hong-cai

2016 Vol. 22, No. 4

Article Contents

Article navigation > Journal of Geomechanics > 2016 > 22(4): 967-975

Next Article Previous Article

ZHAO Wei-hua, WEI Jian-xin, SUN Dong-sheng, LI A-wei, WANG Hong-cai. STUDY ON SEISMIC PROPERTY OF CRACK-INCLUDED PHYSICAL MODEL[J]. Journal of Geomechanics, 2016, 22(4): 967-975.

Citation:

ZHAO Wei-hua, WEI Jian-xin, SUN Dong-sheng, LI A-wei, WANG Hong-cai. STUDY ON SEISMIC PROPERTY OF CRACK-INCLUDED PHYSICAL MODEL[J]. Journal of Geomechanics, 2016, 22(4): 967-975.

STUDY ON SEISMIC PROPERTY OF CRACK-INCLUDED PHYSICAL MODEL

1.
Institute of Geomechanics, CAGS, Beijing 100081, China
2.
Key Laboratory of Neotectonic Movement and Geohazard, Ministry of Land and Resources, Beijing 100081, China
3.
CNPC Key Lab of Geophysical Prospecting, China University of Petroleum, Changping District, Beijing, 102249, China

Received Date: 20 June 2016

Publish Date: 25 December 2016

Abstract

Abstract

It is very helpful in petroleum production, groundwater exploration and to disposal of pollution to investigate the seismic property of the crustal rocks included cracks or fractures. Two group physical models with the same diameter varying crack density and the same density varying diameters were constructed. The seismic velocities were measured under different confining pressure and calculated by numerical simulation based on Hudson theory. The calculated and measured results show that the V_p and V_s nearly increase linearity and there anisotropy keep nearly stable constant with confining pressure. V_p circles decrease with the crack density varying from 2% to 6%. Moreover, the slow V_p decrease more amplitude than the fast V_p which maintains nearly stable, the V_p and V_s anisotropy all increase with the crack density ranging from 2% to 6%.With the crack diameter varying from 2 mm to 3 mm, the V_p increases, but the V_p anisotropy decreases, V_s and the V_s anisotropy nearly remain constant. Comparing the experimental and the theoretical calculated results, new conclusion of Hudson theory used in different depth was discussed, and the primary constraint of its application were analyzed. It is very helpful in petroleum production, exploration of groundwater and disposal of pollution to investigaste the seismic property of the crustal rocks with cracks or fractures.
- crack /
- Hudson theory /
- rock physical model /
- velocity /
- confining pressure

FullText(HTML)

References

[1]	Crampin S, Evans R, Üçer B, et al. Observations of dilatancy-induced polarization anomalies and earthquake prediction[J]. Nature, 1980, 286:874~877. doi: 10.1038/286874a0 CrossRef Google Scholar
[2]	Crampin S. A review of wave motion in anisotropic and cracked elastic-media[J]. Wave Motion, 1981, (3):343~391. Google Scholar
[3]	Crampin S, Sheila P. A review of shear-wave splitting in the compliant crack-critical anisotropic Earth[J]. Wave Motion, 2005, 41:59~77. doi: 10.1016/j.wavemoti.2004.05.006 CrossRef Google Scholar
[4]	刘恩儒, 曾新吾.裂缝介质的有效弹性常数[J].石油地球物理勘探, 2001, 36(1):37~44. Google Scholar LIU En-ru, ZENG Xin-wu. Effective elastic constant of fractured medium[J]. Oil Geophysical Prospecting, 2001, 36(1):37~44. Google Scholar
[5]	韩开锋, 曾新吾. Hudson理论中裂隙参数的适用性研究[J].石油物探, 2006, 45(5):435~440. Google Scholar HAN Kai-feng, ZENG Xin-wu. Study of the boundary element method on applicability of fracture parameters in Hudson theory[J]. Geophysical Prospecting for Petroleum, 2006, 45(5):435~440. Google Scholar
[6]	魏建新, 狄帮让.裂隙密度对纵波传播特性影响的实验观测[J].石油地球物理勘探, 2007, 42(5):554~559. Google Scholar WEI Jian-xin, DI Bang-rang. Experimentally surveying influence of fractural density on P-wave propagating characters[J]. Oil Geophysical Prospecting, 2007, 42(5):554~559. Google Scholar
[7]	魏建新, 狄帮让.裂隙张开度对地震波特性影响的模型研究[J].中国科学(D辑), 2008, (增刊Ⅰ):211~218. Google Scholar WEI Jian-xin, DI Bang-rang. Study on the impact of seismic wave characteristics of crack aspect ratio[J]. Science in China (Series D), 2008, (Supp. I):211~218. Google Scholar
[8]	齐宇, 魏建新, 狄帮让, 等.横向各向同性介质纵波方位各向异性物理模型研究[J].石油地球物理勘探, 2009, 44(6):671~674, 689. Google Scholar QI Yu, WEI Jian-xin, DI Bang-rang, et al. Compressional wave (P-wave) azimuthal anisotropyphysical model studies in transversally isotropic me-dium[J]. Oil Geophysical Prospecting, 2009, 44(6):671~674, 689. Google Scholar
[9]	魏建新, 狄帮让.岩石柱塞样品超声横波速度测试精度分析[J].石油地球物理勘探, 2012, 47(6):918~925. Google Scholar WEI Jian-xin, DI Bang-rang. Test accuracy analysis of S-wave velocity on rock core sample[J]. Oil Geophysical Prospecting, 2012, 47(6):918~925. Google Scholar
[10]	魏建新, 狄帮让.周期层状介质对纵波速度影响的实验研究[J].石油地球物理勘探, 2010, 45(5):661~666. Google Scholar WEI Jian-xin, DI Bang-rang. Experimental research on P-wave velocity of periodic layered media[J]. Oil Geophysical Prospecting, 2010, 45(5):661~666. Google Scholar
[11]	尹志恒, 狄帮让, 魏建新, 等.裂缝参数对纵波能量衰减影响的物理模型研究[J].石油地球物理勘探, 2012, 47(5):728~734, 753. Google Scholar YIN Zhi-heng, DI Bang-rang, WEI Jian-xin, et al. P-wave attenuation by fracture parameter in physical models[J]. Oil Geophysical Prospecting, 2012, 47(5):728~734, 753. Google Scholar
[12]	Hudson J A. Overall properties of a cracked solid[J]. Mathematical Proceedings of the Cambridge Philosophical Society, 1980, 88:371~384. doi: 10.1017/S0305004100057674 CrossRef Google Scholar
[13]	Hudson J A. Wave speeds and attenuation of elastic waves in material containing cracks[J]. Geophysical Journal International, 1981, 64(1):133~150. doi: 10.1111/j.1365-246X.1981.tb02662.x CrossRef Google Scholar
[14]	Hudson J A. A higher order approximation to the wave propagation constants forcracked solid[J]. Geophysical Journal International, 1986, 87(1):265~274. doi: 10.1111/gji.1986.87.issue-1 CrossRef Google Scholar
[15]	Hudson J A, Liu E, Crampin S. The mechanical properties of materials with interconnected cracks and pores[J]. Geophysical Journal International, 1996, 124(1):105~112. doi: 10.1111/gji.1996.124.issue-1 CrossRef Google Scholar
[16]	Hudson J A, Pointer T, Liu E. Effective medium theories for fluid saturated materials with aligned cracks[J]. Geophysical Prospecting, 2001, 49(5):509~522. doi: 10.1046/j.1365-2478.2001.00272.x CrossRef Google Scholar
[17]	Hess H. Seismic anisotropy of the uppermost mantle under oceans[J]. Nature, 1964, 203:629~631. doi: 10.1038/203629a0 CrossRef Google Scholar
[18]	Ji S C, Saruwatari K, Mainprice D, et al. Microstructures, petrofabrics and seismic properties of ultrahigh-pressure eclogites from Sulu region, China:Implications for rheology of subducted continental crust and origin of mantle reflections[J]. Tectonophysics, 2003, 370:49~76. doi: 10.1016/S0040-1951(03)00177-X CrossRef Google Scholar
[19]	杨顶辉, 张中杰, 滕吉文, 等.双相各向异性研究、问题与应用前景[J].地球物理学进展, 2000, 15:7~21. doi: 10.3969/j.issn.1004-2903.2000.02.002 CrossRef Google Scholar YANG Ding-hui, ZHANG Zhong-jie, TENG Ji-wen, et al. The study of two-phase anisotropy questions and applied prospects[J]. Progress in Geophysics, 2000, 15:7~21. doi: 10.3969/j.issn.1004-2903.2000.02.002 CrossRef Google Scholar
[20]	张中杰, 滕吉文, 陈运泰.地球物理学的回顾与展望[J].地球物理学进展, 2001, (5):345~352. Google Scholar ZHANG Zhong-jie, TENG Ji-wen, CHEN Yun-tai. Geophysics:The 20^th Century in retrospect and the 21^st Century in prospect[J]. Progress in Geophysics, 2001, (5):345~352. Google Scholar
[21]	曲寿利, 季玉新, 王鑫, 等.全方位P波属性裂缝检测方法[J].石油地球物理勘探, 2001, 36(4):390~397. Google Scholar QU Shou-li, JI Yu-xin, WANG Xin, et al. Seismic method for using full-azimuth P wave attribution to detect fracture[J]. Oil Geophysical Prospecting, 2001, 36(4):390~397. Google Scholar
[22]	滕吉文, 王光杰, 杨顶辉, 等, 地球各向异性介质中地震波动理论、检测与应用研究[J].地学前缘, 1998, 5(1):83~90. Google Scholar TENG Ji-wen, WANG Guang-jie, YANG Ding-hui, et al. The study for propagation theory of seismic waves, detection technique and application on anisotropic media in the earth's interior[J]. Earth Science Frontiers, 1998, 5(1):83~90. Google Scholar
[23]	Thomsen L. Weak elastic anisotropy[J].Geophysics, 1986, 51:1954~1966. doi: 10.1190/1.1442051 CrossRef Google Scholar
[24]	Thomsen L. Weak anisotropic reflections[C]//Castagna J P, Backus M M. Offset dependent eflectivity. SEG, 1993. Google Scholar
[25]	Thomsen L. Elastic anisotropy due to aligned cracks in porous rock[J]. Geophysical Prospecting, 1995, 43:805~829. doi: 10.1111/gpr.1995.43.issue-6 CrossRef Google Scholar