GEOLOGICAL MODEL AND PREDICTION FOR FAVORABLE AREAS OF NATURAL GAS HYDRATE IN SHENHU AREA
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摘要: 针对目前天然气水合物沉积成矿因素复杂、预测难度大的问题,通过利用高分辨率三维地震、测井和岩心等资料来分析南海北部神狐海域BSR分布及天然气水合物成矿带的沉积特征、地震属性和物性特征,表明研究区天然气水合物分布在一定沉积相带、地震属性和物性范围内;然后根据实际资料情况,选择合理的建模方法,建立了天然气水合物沉积相、地震属性和物性模型;综合考虑3种模型中天然气水合物分布有利区,对层序Ⅴ天然气水合物分布的有利区带进行了预测,主要分布在S2和S3以南至S5之间,S4井周围少量分布,这种预测方法具有一定的科学意义和较好的实际参考价值。Abstract: In order to deal with the complex sforming factors and tough prediction problem of natural gas hydrate, this paper analysised the sedimentary characteristics, sensitive seismic attributes and physical properties of the natural gas hydrate bearing zone by BSR tracing, based on integrating 3D seismic data, well log data and core data in the Shenhu Area, North Slope of the South China Sea. It is tound that the distribution of natural gas hydrate was restriclto within certain sedimentary facies, seismic attributes and physical properties. Reasonable method was selected to establish sedimentary facies, seismic attributes and physical models according to the actual data. with the three kinds models, favorable areas in sequence V was predicted which was mainly distributed between south well S2, S3 and well S5. Few was distributed around wells S4.
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