Key Exploration Approach and Techniques for Offshore Lithologic Reservoirs: A Case Study on the Middle Section of Shijiutuo Salient in Bohai Sea Area

Abstract

Abstract: In the 1990s, oil and gas exploration in the middle section of Shijiutuo Salient, Bohai Sea area, focused primarily on structural reservoirs and secondarily on lithologic reservoirs. Over a decade of exploration, however, no breakthrough progress was made in this area. Accordingly, exploration targets were changed to lithologic reservoirs at structural flanks, which have revealed good results. Through the practices of lithologic reservoirs, a set of exploration approach and techniques have been concluded for the middle section of Shijiutuo Salient. In detail, based on integrated exploration and development, sequence stratigraphy framework of target layers is established by using sequence stratigraphic classification technique, and key geophysical technologies (e.g. fine time-depth conversion, formation slice, combined seismic attribute analysis and integrated reservoirs prediction) are combined, in order to realize great progress in the exploration of lithologic in the area. Application has proved good results, with the success rate of drilling up to 80%.

Gu Zhimeng, Wang Deying, Wang Mingchen, Yang Haifeng, Zhang Li. Key Exploration Approach and Techniques for Offshore Lithologic Reservoirs: A Case Study on the Middle Section of Shijiutuo Salient in Bohai Sea Area[J]. China Petroleum Exploration, 2015, 20(4): 54-62.

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