3-D Seismic Acquisition Cases on Carbonatite of Tazhong Desert Area

摘要

It showed a good prospect of exploration in mid area of Taklamakan desert where lithologic carbonate oil/gas reservoirs were widely found. In the 3-D seismic exploration in this area, we adopted the following techniques and methods: aimed at fractured reservoir of carbonate, the optimized design of geometry for reducing acquisition footprints was performed; aimed at improving the S/N ratio of fractured and cavernous reservoir, quantitative design of folds was carried out; the techniques of one hundred percent of shooting under water table, high-precision near-surface investigation method and sand-dune curve static correction were adopted; also, we analysed the influence of sand dunes on the seismic data through field investigation and improved the traditional field receiving method. Through application of these techniques and methods , the quality of 3-D seismic data acquired afresh has been greatly improved, which renewed the geologic knowledge in this area and obtained a visible acquisition effect.