塔河油田AT11井区低幅度构造圈闭的识别方法

Recognition method for low-relief structural trap at AT11 well field of Tahe oilfield

（石油化工管理干部学院,北京100012）

SINOPEC Management Institute, Beijing 100012, China

随着塔河油田三叠系油藏勘探和开发的深入，规模小、构造幅度低且被断层复杂化的油气藏所占比例越来越高，圈闭识别的难度逐渐加大，因此识别和落实低幅度背斜圈闭对三叠系油气藏勘探开发至关重要。针对此，开展了低幅度构造识别技术研究，形成了由地震资料层位精细标定、层位自动追踪对比、等时切片提取、相干断裂系统解释、精细速度分析、地震振幅属性提取与分析等技术构建的低幅度构造识别方法。将该方法应用于塔河油田阿克亚苏盐上地区，新发现了众多低幅度构造油气圈闭，扩大了阿克亚苏地区三叠系低幅度含油气圈闭群。在新落实的低幅度构造上部署的多口井均有油气发现。

As the exploration and development of Territory reservoirs at Tahe oilfield, small-scale reservoirs with low-relief structures complicated by faults accounts more proportion, the recognition of traps becomes more difficult. Therefore, recognition and identification of low-relief anticlinal trap is important for the exploration and development of Territory reservoirs. Aiming at the problem, the study on low-relief structure recognition technology is carried out, and the technical series for recognizing low-relief structure is established, including seismic reflection horizon detailed calibration, horizon auto-tracing and contrast, iso-time slice extraction, fault system coherent interpretation, detailed velocity analysis, seismic amplitude extraction and analysis, etc. the method is applied on supra-salt structure at Akeyasu, Tahe oilfield, many low-relief structural hydrocarbon traps are discovered, which enlarges Territory low-relief hydrocarbon trap group at Akeyasu area. Many wells are drilled at the newly identified low-relief structures; oil/gas detection result is good at all wells.