THE COMPUTATION OF LVL CORRECTION PARAMETERS IN PARTS OF WESTERN NIGER DELTA (OML 62)

Abstract

Data from sixty one different locations in OML-62 in the Western Niger Delta were used for this study. This study determined the low velocity layer (LVL) correction parameter namely, weathering velocity, sub-weathering velocity, and the thickness of the weathering layer. Also, an isopach map and a NW-SE profile were used to depict variation trend in the thickness of the weathering layer. The results show that the weathering velocity ranges from 210 to 994 m/s, with an average value of 552m/s. The subweathering layer velocity varies from 1358 to 2464m/s, with an average of 1734m/s. The thickness of the weathering layer varies from 2.8 to 52.8m with and average of 19.3m. The parameters so computed are important to the exploration seismologist especially in determining the time delays needed for static corrections during seismic reflection data processing. Also, depth to which energy sources can be buried is known and the bearing capacity of the foundation rock for civil engineering works can also be assessed.


KEY WORDS: Low velocity layer, weathering velocity, sub-weathering velocity, thickness of velocity layer and correction parameters.


Global Jnl Geological Sciences. Vol.2(1) 2004: 45-50