A 2-D seismic survey in India is a way of measuring the earth's inside surface by studying the reflected sound waves from the ground. This information can be used to map out fault lines, identify reservoirs of oil and gas, and study natural resources. A seismic survey is a type of survey that uses sound waves to map the earth's surface. In India, a seismic survey is often done in order to determine the location of potential oil and gas reserves.