深水浅层松散细粒水合物储层新型含水饱和度模型建立及应用  

Establishment and application of a new water saturation model for shallow and loose finegrained hydrate reservoirs

作　　者：赵军[1] 廖文海 汤翟 贾将 骆玉虎 ZHAO Jun;LIAO Wenhai;TANG Di;JIA Jiang;LUO Yuhu(School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,China;Hainan Branch,CNOOC(China)Co.,Ltd.,Haikou 570311,China)

机构地区：[1]西南石油大学地球科学与技术学院,四川成都610500 [2]中海石油(中国)有限公司海南分公司,海南海口570311

出　　处：《天然气地球科学》2025年第2期197-208,共12页Natural Gas Geoscience

基　　金：中国海洋石油集团有限公司专项“琼东南盆地天然气水合物测井识别及评价方法研究”(编号:CEL202HNFN0009);广东省海洋经济发展专项资金项目“天然气水合物拖曳式广域电磁与激电全息探测系统研究与应用”(编号:粤自然资合[2021]57号)联合资助。

摘　　要：含水饱和度是天然气水合物资源评价的重要参数,然而使用传统阿尔奇公式计算含水饱和度的精度通常无法满足要求。根据琼东南盆地实际钻探取心沉积物资料,人工制备6个不同配比的沉积物样品,通过岩石物理实验,测量非固结沉积物中水合物生成过程中的岩电数据,分析电阻率及电阻率增大系数的变化规律。实验结果表明,水合物样品的含水饱和度与电阻率增大系数之间符合指数变化关系。结合数字岩心导电模拟,建立了指数型含水饱和度计算模型。对实际测井资料进行处理,指数型含水饱和度计算模型比传统的阿尔奇公式具有更高的精度。指数型含水饱和度模型为天然气水合物资源评价提供了一种新的方法。Water saturation is an important parameter in the evaluation of natural gas hydrate resources,but the accuracy of calculating water saturation using the traditional Archie formula is often unable to meet the requirements.According to the actual drilling and coring sediment data from Qiongdongnan Basin,six sediment samples with varying proportions were artificially prepared.The petroelectrical data during the hydrate formation of unconsolidated sediments were measured by petrophysical experiments,and the changing rules of resistivity and resistivity increasing coefficient were analyzed.The experimental results show that there is an exponential relationship between water saturation and resistivity increase coefficient of hydrate samples.Combined with digital core conduction simulation,an exponential water saturation calculation model is established.The exponential water saturation calculation model is more accurate than the traditional Archie formula when processing actual logging data.The exponential water saturation model provides a new method for evaluating natural gas hydrate resources.

关 键 词：天然气水合物 松散沉积物 测井响应 岩电特征 饱和度 

分 类 号：TE132.3[石油与天然气工程—油气勘探]