FEASIBILITY OF LMR TEC

Abstract

In order to map the subsurface to understand the potential of the hydrocarbons present, an understanding of the lithology and its uids is of the utmost importance. Geoscientists spend a lot of time identifying the lithologies using well logs, but there are instances when using the conventional methods gives us ambiguous results. Presence of uids or their withdrawal can change the signatures that we observe and leads to the ambiguity. In this study, we use crossplots of di erent petrophysical parameters like Lambda - Mu - Rho, P impedance and S impedance, Vp, Vs to classify and discriminate among the lithology and the uid. This study shows a comparative study of lithology and uid identi cation between sandstones and carbonates. Lambda Mu Rho technique, i.e. crossplots of Lambda Rho and Mu Rho is able to discriminate between gas sand, brine sand, carbonate and shale in a much better way. It also increases the detectability and sensitivity of uids and carbonates over other fundamental methods. In this study we see how the gas sands and non reservoir sands are separated from the background shales. We also see the behaviour of carbonates on the crossplots and understand their importance of the mineral constituting the carbonate formations.