Abstract: Although a great breakthrough has been achieved in the exploration of Tarim Basin through multi-round brainstorms, what the exploration and production of complex hydrocarbon reservoirs in Tarim Basin are confronted with are still world-class difficulties. The key issues for highly-steep complex structures include the low SNR and the migration imaging of complex wave fields. The bottleneck problems need to be settled for the exploration and production of deep carbonate strata are to further improve the imaging accuracy of fracture-cavity systems and the prediction precision of the fracture growth direction and density. Tarim Geophysical Agency of BGP Inc., aiming to meet the design requirements for prestack migration, has performed a wide-azimuth, full-azimuth and quasi-full-azimuth 3D seismic exploration brainstorm with the wide-azimuth high-fold geometry technique in regard to the deep carbonate hydrocarbon reservoirs and highly-steep complex structures and has achieved an excellent exploration result, and therefore, has opened up a favorable new situation for the exploration of complex hydrocarbon reservoirs in Tarim Basin.

Key words: migration, WAZ 3D, full-azimuth 3D, quasi-full-azimuth 3D, Tarim Basin, oil and gas exploration

摘要： 塔里木盆地经多轮地震攻关取得了勘探大突破,但复杂油气藏的勘探开发所面临的仍然是世界级难题。复杂高陡构造勘探的关键问题是低信噪比和复杂波场偏移成像。大深度碳酸盐岩勘探开发需要解决的关键问题是:进一步提高缝洞体系成像精度和裂缝发育方向及密度刻画精度。东方地球物理公司塔里木物探处从满足叠前偏移的设计要求出发,针对复杂高陡构造、大深度碳酸盐岩油气藏进行了宽方位三维、全方位三维及拟全三维地震勘探技术攻关,并取得了良好的成果,打开了塔里木盆地复杂油气藏勘探的新局面。

关键词: 偏移, 宽方位三维, 全方位三维, 拟全三维, 塔里木盆地, 油气勘探