Abstract: Kelameili gas field in Junggar basin is rich in oil and gas resources of Carboniferous, but its igneous rock is complex in the spatial distribution of reservoir. Based on the previous seismic data and existing seismic interpretation results, there is a risk of arrangement for production well due to low signal-to-noise ratio, limited resolution and unclear image in interior of Carboniferous. Using linked 3D seismic data volume that is processed by pre-stack time migration, the signal-to-noise ratio and the event continuity can be improved, and the composite wave reflection of the top interface of Carboniferous becomes clear, with distinct characteristics of its interior and lithofacies. This paper presents the development and distribution patterns of the Carboniferous igneous rock in Well Block Dixi-14 and Dixi-18 by fine calibration, the seismic attribute analysis and integrating with drilling and well logging data. Also, this paper describes the igneous reservoir of Carboniferous using SMT software, showing the distribution characteristics of favorable igneous rock body, which provides reliable foundation for the implementation of next development program.

Key words: Kelameili gas field, Carboniferous, igneous rock, seismic attribute, development pattern