APPLICATION OF FINE PREDICTION TECHNIQUE TO LOCALLY HALITE CEMENTED RESERVOIR IN THE DEEP WATER PRE-SALT AREA OF GABON BASIN, WEST AFRICA
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摘要:
西非加蓬盆地是一个典型的大西洋被动大陆边缘盆地，其深水盐下为一个高风险与高潜力并存的勘探新领域。近年来，在加蓬深水区M气田的勘探中，遇到了盐胶结型储层预测的新难题。在钻井数量少、地震资料品质有限以及缺乏成熟技术体系参考的条件下，通过对盐胶结成因机制进行深入研究，结合岩石物理分析、地震属性分析、盐胶结型砂岩储层岩石物理模型以及正、反演等关键地球物理技术手段，对盐胶结储层进行精细综合预测，探索形成了“基于地质成因机制指导下的盐胶结储层精细预测技术组合”。运用该技术有效预测了M气田的有利储层分布区，指导了M气田的勘探及评价。
Abstract:The Gabon Basin is a typical Atlantic type of passive margin basin. The deep water pre-salt area of the basin has been an exploration target with both high risk and high potentiafor some time. Effected by factors such as poor quality of pre-salt seismic images, fine reservoir prediction has become a severe challenge to pre-salt exploration for a long time. Recently, a new problem concerning halite cemented reservoir prediction is encountered in the M Gas Field of Gabon deep water area. Based on our research, a specific technical assemblage called“fine halite cemented reservoir prediction technique based on genesis” was proposed. Firstly, the genetic mechanism of halite cementation is made clear on the basis of geophysical and geological analysis; Secondly, petro-physics, seismic attribute analysis, seismic forward simulation and impedance inversion are adopted to predict halite cemented reservoirs. Finely. by application of the technical assemblage, favorable reservoir distribution pattern of the M Gas Filed was effectively predicted, and under the guidence of the research result great success has achieved in exploration evaluation of the M Gas Field.
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