--> --> Intelligent Seismic Inversion; From Surface Seismic to Well Logs via VSP. Artun, Emre, Mohaghegh, Shahab D.,  Toro, Jaime, Wilson, Tom, and Sanchez, Alejandro #90044 (2005).
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Intelligent Previous HitSeismicNext Hit Inversion; From Surface Previous HitSeismicNext Hit to Well Logs via VSP

 

Artun, Emre 1, Mohaghegh, Shahab D. 1,  Toro, Jaime 1, Wilson, Tom 1, and Sanchez, Alejandro 2

1West Virginia University

2Anadarko Petroleum Corporation

 

In the petroleum exploration work flow, geologists and geophysicists use Previous HitseismicNext Hit data to forecast the possible existence of hydrocarbon resources by structural mapping of the subsurface, and making interpretations of the reservoir’s facies distribution. Engineers use this information to make decisions on possible locations for new exploration or development wells. The relatively low resolution of Previous HitseismicNext Hit data usually limits its further use. Yet, its areal coverage and availability suggest that it has the potential of providing valuable data for more detailed reservoir characterization studies through the process of Previous HitseismicNext Hit inversion.

In this study, a novel intelligent Previous HitseismicNext Hit inversion methodology is presented to achieve a desirable correlation between relatively low-frequency Previous HitseismicNext Hit signals, and the much higher frequency wireline-log data. Vertical Previous HitseismicNext Hit profile (VSP) is used as an intermediate step between the well logs and the surface Previous HitseismicNext Hit. A synthetic Previous HitseismicNext Hit model is developed by using real data and Previous HitseismicNext Hit interpretation. In the example presented here, the model represents the Atoka and Morrow formations, and the overlying Pennsylvanian sequence of the Buffalo Valley Field in New Mexico. Artificial neural networks are used to build two independent correlation models between; 1) Surface Previous HitseismicNext Hit and VSP, 2) VSP and well logs. After generating virtual VSP’s from the surface Previous HitseismicNext Hit, well logs are predicted by using the correlation between VSP and well logs. Density logs were predicted with 87% accuracy through the Previous HitseismicNext Hit line. The same procedure can be applied to a complete 3D Previous HitseismicTop block to obtain a detailed view of reservoir quality distribution.