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珠江口盆地番禺流花天然气区的PY气田位于陆架陆坡转折带上,特殊的沉积环境导致该地区主要储层SB21.0砂岩含油气性结论复杂,常规的AVO技术在该地区的应用存在陷阱。将统计岩石物理学与AVO理论结合,得到流体成分反演理论。流体成分反演技术是AVO技术的延伸,是一种定量的AVO技术,其最终结果是直观的碳氢指示分布图。采用流体成分反演技术,对研究区SB21.0储层进行含油气性预测。研究结果表明:流体成分反演技术能较有效、准确地检测已上钻目标储层及验证未上钻目标储层的流体性质。该理论的深入应用将有助于指导番禺流花天然气区的进一步勘探。
The PY gas field in Liuhua gas field in Panyu, Pearl River Mouth Basin, is located on the transition zone of continental shelf slope. The special sedimentary environment led to the complicated hydrocarbon-bearing properties of SB21.0 sandstone in the main reservoir in this area. The conventional AVO technique has some pitfalls in this area. Combining statistical petrophysics with AVO theory, the fluid composition inversion theory is obtained. The fluid composition inversion technique is an extension of the AVO technique and is a quantitative AVO technique whose end result is an intuitive indication of hydrocarbon distribution. The fluid composition inversion technique is used to predict the oil and gas content of SB21.0 reservoir in the study area. The results show that the fluid composition inversion technique can effectively and accurately detect the fluid properties of the target reservoir that has been drilled and the target reservoir that has not been drilled. The in-depth application of this theory will help to guide the further exploration of Liuhua gas field in Panyu.