Exploration A seismic exploration to find a gas trap is carried out at 2 different location A and B. The following data is recorded: Location A: Reflection Coefficient (R) between layers = 0.7 Location B: Reflection coefficient (R) between layers = -0.782 (3 marks) In which location a gas trap most likely to be found? Give reasons for your choice using the data given above. (3 marks) For the identified location of the gas trap above, the following data is recorded. Time taken to hear first reflected sound waves from layer boundary is 3 seconds Layer 1 density,p1 = 2 g/cm Layer 1 Impedance, Z = 4x105 kg.m.s-1 Calculate the borehole depth we need to drill to reach the gas trap in layer 2 (Make sure the units are consistent in your calculation) Air Layer 1 Layer 2 Seismic Truck