摘要
海底天然气水合物的储量主要取决于水合物的分布面积、水合物稳定带的厚度、沉积层的孔隙度及水合物的饱和度 (或充填率 )等 ,其中水合物在沉积物孔隙中的饱和度对其储量的估计具有重要意义。目前很难通过原地直接测量来获得这种饱和度数据 ,一般根据地球化学或地球物理方法取得。水合物饱和度预测技术主要有 :利用岩心孔隙水氯离子浓度、地球物理测井、地震波速度等间接手段。每一种技术都不是完善的 ,而海底含水合物的沉积物又是一个复杂的系统 ,在预测中应根据实际情况选择比较合适的方法 。
Accurately predicting the saturation of the gas hydrate within submarine sediments is one of the critical issues for reserves calculation. At present time, the data of the saturation is hard to gain at the place by a direct measure so that they are still predicted by usual geochemical and geophysical methods, which mainly include the measuring of concentration of chlorine ion in pore water from sediment cores, the geophysical well-logging, and the seismic wave velocity. Not each of them is faultless for using to the complicated submarine sediments system so that an appropriate one of them should be applied to predict it and more than one of models should be selected to correlate according to actual conditions.
出处
《海相油气地质》
2004年第1期111-115,共5页
Marine Origin Petroleum Geology
基金
中国地质调查局天然气水合物资源勘查及开发技术研究项目 (YH118)
国家海洋局海底科学重点实验室开放基金 (批准号 :2 0 0 3 -3 )
国家自然科学基金 (批准号 :40 2 72 0 5 2 )联合资助项目
关键词
海底天然气水合物
饱和度预测
储量
地球物理测井
Natural gas hydrate, Saturation, Prediction technique, Concentration of chlorine ion, Geophysical logging, Seismic wave velocity
