三向围压下碳酸盐岩的动态力学试验
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摘要
原位地层中的碳酸盐岩在动态冲击下的力学行为是研究大规模开发碳酸盐岩油气藏的基础。利用真三轴霍普金森压杆装置,对碳酸盐岩在三向围压下的动态力学行为进行研究,测得碳酸盐岩试样在受到三向不同围压、单向冲击荷载作用下的动态应变率和动态抗压强度,揭示出在三向围压下碳酸盐岩受到动态冲击后仅出现微裂缝开裂的特征。
The dynamic mechanical behavior of carbonate rock subjected to dynamic impact in in-situ formation is one of the basic understandings for the large-scale development of carbonate reservoirs. In this paper, the dynamic mechanics of carbonate rock under true triaxial confining pressures was experimental investigated by 3 D Hopkinson pressure bar system. During the experiment, the carbonate rock specimens were under the true triaxial confining pressures and loaded dynamically in one incident bar. The dynamic strain rate and dynamic compressive strength of carbonate rock under true triaxial confining pressures were obtained to characterize the differences in the three vertical directions. The results demonstrate that only microcracks appear in true triaxial confining carbonate rock subjected to the dynamic loading.
The dynamic mechanical behavior of carbonate rock subjected to dynamic impact in in-situ formation is one of the basic understandings for the large-scale development of carbonate reservoirs. In this paper, the dynamic mechanics of carbonate rock under true triaxial confining pressures was experimental investigated by 3 D Hopkinson pressure bar system. During the experiment, the carbonate rock specimens were under the true triaxial confining pressures and loaded dynamically in one incident bar. The dynamic strain rate and dynamic compressive strength of carbonate rock under true triaxial confining pressures were obtained to characterize the differences in the three vertical directions. The results demonstrate that only microcracks appear in true triaxial confining carbonate rock subjected to the dynamic loading.
引文
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[2]杨坚,吴涛.塔河油田碳酸盐岩缝洞型油气藏开发技术研究[J].石油天然气学报,2008(3):326-328.YANG J,WU T.Technique of reservoir development in carbonate fracture-vug reservoirs in Ta He oilfield[J].Journal of Oil and Gas Technology,2008(3):326-328.
[3]AMEEN M S,SMART B G D,SOMERVILLE J M,et al.Predicting rock mechanical properties of carbonates from wireline logs(A case study:Arab-D reservoir,Ghawar field,Saudi Arabia)[J].Marine and Petroleum Geology,2009,26(4):430-444.
[4]JAROT S,ARIFFIN S.Characterization,pressure,and temperature influence on the compressional and shear wave velocity in carbonate rock[J].International Journal of Engineering and Technology,2009,9(10):80-93.
[5]徐国盛.济阳坳陷古潜山碳酸盐岩储集层声力学特征[J].成都理工大学学报(自然科学版),2004,31(6):663-667.XU G S.Acoustic and mechanical characteristics of carbonate rock reservoir of buried hills in Jiyang Depression,China[J].Journal of Chengdu University of Technology(Science&Technology Edition),2004,31(6):663-667.
[6]FIORETTI G,ANDRIANI G F.Ultrasonic wave velocity measurements for detecting decay in carbonate rocks[J].Quarterly Journal of Engineering Geology and Hydrogeology,2018,51(2):179-186.
[7]蒋廷学,汪永利,丁云宏,等.由地面压裂施工压力资料反求储层岩石力学参数[J].岩石力学与工程学报,2004,23(14):2424-2429.JIANG T X,WANG Y L,DING Y H,et al.Determination of rock mechanics parameters by pressure of surface fracturing treatment[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(14):2424-2429.
[8]路保平,鲍洪志.岩石力学参数求取方法进展[J].石油钻探技术,2005,33(5):47-50.LU B P,BAO H Z.Advances in calculation methods for rock mechanics parameters[J].Petroleum Drilling Techniques,2005,33(5):47-50.
[9]GRADY D E,HOLLENBACH R E,SCHULER K W.Compression wave studies on calcite rock[J].Journal of Geophysical Research:Solid Earth,1978,83(B6):2839-2849.
[10]TYBURCZY J A,AHRENS T J.Dynamic compression and volatile release of carbonates[J].Journal of Geophysical Research:Solid Earth,1986,91(B5):4730-4744.
[11]DAUTRIAT J,GLAND N,DIMANOV A,et al.Hydromechanical behavior of heterogeneous carbonate rock under proportional triaxial loadings[J].Journal of Geophysical Research:Solid Earth,2011,116(B1):1-26.