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| THE APPLICATION OF STRUCTURAL CURVATURE AND AMPLITUDE CURVATURE ATTRIBUTE TO SEISMIC INTERPRETATION |
| LI Pei-pei, ZHAO Ru-min, YANG Song-ling, LIU Zhi-guo, BAI Guan-jun |
| CNOOC Research Institute, Beijing 100027, China |
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Abstract Based on an analysis and contrast of seismic curvature attributes,this paper aims at finding effective curvature attributes to interpret the seismic data so as to improve the efficiency and accuracy of interpretation.The amplitude curvature attribute and structural curvature attribute are independent of each other in mathematics.The amplitude curvature attribute can be computed by the second derivative of seismic amplitude data.Faults and geological anomalies in general seismic section have such features as variation of the homophase axis,twist,and abrupt change of the amplitude.These variations show small linear structure in the seismic horizon curvature attribute,so faults and geological anomalies can be interpreted according to linear structure anomaly.This paper also sums up the notable problems in the application of curvature attributes.Amplitude curvature attribute not only reflects structural characteristics but also highlights the difference between the amplitudes of geological factors,thus demonstrating the geological features.This technique can effectively portray boundaries of sedimentary bodies,hierarchical structure, and fracture system.The applications show that the utilization of amplitude curvature attributes is effective and convenient in interpreting faults.With this technique,the tracks of the faults and the sizes,shapes and boundaries of sedimentary bodies become continuous and clear, and the fault interpretation becomes more easy.
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Received: 16 August 2012
Published: 10 October 2013
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