Abstract:The joint utilization of compressional and shear wave data favours us to discover nonstructural hydrocarbon traps such as stratigraphic trap, lithologic trap, fracture trap, etc. and to ascertain fluid situation in formation, lithologic variation and fracture zone, so that the accuracy of seismic data interpretation is improved greatly. I describe how to determine shear wave horizon, how to interprete carbonate reservoir and how to discover gas accumulation zone in HBC area in Sichuan Province. It is very important to pay more attention to analysing the ratio between compressional wave amplitude and shear wave amplitude, and the ratio between compressional wave velccity and shear wave velocity in data interpretation. The amplitude ratio anomaly and the velocity ratio anomaly in HBC area can be usually seen at anticlinal axis areas and small noses. Generally speaking, the amplitude ratio anomaly area reflects gas accumulation and the velocity ratio anomaly area exhibits dense fracture zone. Good results have been obtained from exploratory wells in the areas where there occur the two anomalies simultaneously.
邓富求. 山区纵、横波联合勘探的资料解释[J]. 石油地球物理勘探, 1992, 27(5): 617-629.
Deng Fuqiu. Data interpretation of joint compressional and shear wave survey in mountainous region. OGP, 1992, 27(5): 617-629.