| 倾斜裂缝地层qP波方位反射系数椭圆特征研究 |
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| 引用本文： | 王顺昌,田景春,贾瀛,李春鹏,林小兵. 倾斜裂缝地层qP波方位反射系数椭圆特征研究[J]. 物探化探计算技术, 2014, 0(4): 452-457 |
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| 作者姓名： | 王顺昌 田景春 贾瀛 李春鹏 林小兵 |
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| 作者单位： | 成都理工大学"油气藏地质及开发工程"国家重点实验室;中国石油天然气勘探开发公司;中海油研究总院; |
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| 基金项目： | 国家重大科技专项(2011ZX05007-003-01);四川省青年基金项目(11ZA051) |
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| 摘 要： | 倾斜定向排列裂缝地层可以等效为TI介质,根据TI介质弹性波反射透射方程,模拟了上覆各向同性泰勒岩/下伏含有倾斜裂缝的奥斯汀白垩岩模型qP波方位反射系数。通过将qP波方位反射系数拟合成椭圆,研究了裂缝密度、裂缝倾向、裂缝倾角与椭圆参数的关系。研究发现,随着裂缝密度增大椭圆扁率也在增大,裂缝倾向与椭圆中心点方位相差180°,裂缝倾角与椭圆中心点到坐标原点距离存在一定的对应关系。本研究可以为预测倾斜裂缝地层提供一定的理论支撑。
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| 关 键 词： | 倾斜裂缝 TI介质 椭圆特征 |
Study on the elliptic characteristic of qP wave azimuth reflectivity from tilt fracture strata |
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| Affiliation: | WANG Shun-chang, TIAN Jing-chun, JIA Ying, LI Chun-peng, LIN Xiao-bing (1. State Key Lab of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology, Chengdu 610059,China; 2. China National Oil Gas Exploration and Development Corporation, Beijing 100034,China; 3. China National Offshore Oil Corporation Research Institute, Beijing 100027,China) |
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| Abstract: | Tilt orientational fracture formation can be equivalent to TI medium.Therefore,according to the elastic wave reflec-tion and transmission equation of TI medium,we simulated qP wave azimuth reflectivity of isotropic Taylor rock overlying Aus-tin cretaceous rock with tilt fracture.By fitting qP wave azimuth reflectivity with ellipse,the relationship between fracture den-sity,fracture trend,fracture dip and elliptic parameter is studied in this paper.The study found that,with the fracture density increasing,ellipticity also increasing,and that there was a 180 degrees azimuth between fracture trend and ellipse center.And there was a certain correspondence between the distance from fracture dip and ellipse center to the origin of coordinates.Thus, this study could provide a theoretical support for predicting dipping fracture layers. |
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| Keywords: | tilt fracture TI medium elliptic characteristic |
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