INTEGRATED EXPLORATION TECHNIQUES USED FOR AND HYDROCARBON DISCOVERIES FOUND IN THE COMPLEX HIGH STEEP STRUCTURES OF KUCHE MOUNTAIN AREA, TARIM BASIN, CHINA

摘要

There are rich gas resources in the mountain area of Kuche, Xinjiang, where the combination of source rock-reservoir bed-cap rock is excellent. The seismic exploration there, however, is very difficult. After several years’ effort, an adequate comprehensive exploration technique, suitable for petroleum exploration in mountain area, has been developed by integration of data acquisition, processing and interpretation. The technique includes: (1) the target-oriented acquisition technique in areas with complex surface and subsurface conditions, (2) the precise target-oriented processing technique, (3) the pre-stacked time and depth migration technique, (4) the technique for constructing the precise velocity field of the target zone, and (5) model establishment and the industry mapping technique for constructing the complex structural traps with steep strata. With application of these new seismic techniques, deep traps can precisely be described. Meanwhile, a set of drilling technique for steep dip layers and high-pressure gypsiferous mudstones, logging technique for complex well bore and test technique for high-pressure well in mountain front area has been developed and completed. By use of these techniques, a great achievement of natural gas exploration in Kuche mountain area has been achieved recent three years.