Abstract：Reverse time migration (RTM) contains three steps: First, source wavefield are forwardly extra-polated by the two-way wave equation. Then recei-ver wavefield is reversely extrapolated, and a local imaging data volume is created using imaging conditions to summate at every step extrapolation. Finally the imaging of all the source gathers is stacked together to get the final prestack depth migration. GeoEast-Lighting software has following advantages: A. Being suitable for migration of different datum; B. A complete set of accurate and efficient reverse-time migration algorithms; C. Being able to flexibly extract the imaging gathers; D. Very high-efficient parallel computation and easy operation thanks to the original autonomic parallel model. With the comprehensive applications of horizon-based velocity modeling and grid tomography velocity modeling provided by GeoEast, accurate interval velocity models are created for the Block X in Turkmenistan. RTM technology achieves preferably accurate imaging of salt beds with lateral velocity variation for the future hydrocarbon development.
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