天然气水合物饱和度测井解释模型及方程  

Gas hydrate saturation model and equation for logging interpretation

作　　者：李宁[1] 孙文杰[2] 李心童 冯周[1] 武宏亮[1] 王克文[1] LI Ning;SUN Wenjie;LI Xintong;FENG Zhou;WU Hongliang;WANG Kewen(PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China;Peking University,Beijing 100871,China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]北京大学,北京100871

出　　处：《石油勘探与开发》2022年第6期1073-1079,共7页Petroleum Exploration and Development

摘　　要：由于天然气水合物能够以孔隙充填、颗粒支撑及成层状3种不同形式同时存在,采用针对砂泥岩地层的传统解释模型和方法计算水合物饱和度,相当于只考虑了孔隙充填这一种存在形式,并不适用于水合物的其他赋存状态类型。通过水合物电阻率实验数据分析,从电阻率-含油(气)饱和度关系一般形式出发,导出适合水合物饱和度计算的最佳简式,明确了简式中3项的物理意义,即分别代表水合物颗粒完全分布于地层岩石孔隙中、以颗粒方式支撑和以成层状存在时的电阻增大率,建立了相应的水合物饱和度定量评价方法。现场应用表明,通过该方法计算得到的水合物饱和度不受水合物存在形式的影响,与现场取样分析得到的水合物饱和度更为吻合,同时也为水合物探明后确定有效开发方式提供测井参数依据。Since gas hydrate exists in three different forms at the same time such as pore filling,particle support and separate stratification,the calculation method of hydrate saturation using traditional shaly sand formation interpretation models is equivalent to considering only the simple case that hydrate exists as pore filling,and does not consider other complex states.Based on the analysis of hydrate resistivity experimental data and the general form of the resistivity-oil(gas)saturation relationship,the best simplified formula of hydrate saturation calculation is derived,then the physical meaning of the three items are clarified:they respectively represent the resistivity index-saturation relationship when hydrate particles are completely distributed in the pores of formation rocks,supported in the form of particles,and exist in layers,corresponding quantitative evaluation method of hydrate saturation is built.The field application shows that the hydrate saturation calculated by this method is closer to that obtained by sampling analysis.At the same time,it also provides a logging analysis basis for the effective development after hydrate exploration.

关 键 词：非常规油气资源 天然气水合物 电阻增大率 饱和度 非阿尔奇特性 测井解释 

分 类 号：TE122[石油与天然气工程—油气勘探]