疏松天然气储层保压岩心气体饱和度实验技术  

EXPERIMENTAL TECHNIQUE OF THE GAS SATURATION FOR THE PRESSURE CORE IN UNCONSOLIDATED NATURAL GAS RESERVOIR

作　　者：曲斌[1] 刘玉[1] 陈志敏[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院

出　　处：《大庆石油地质与开发》2014年第2期35-41,共7页Petroleum Geology & Oilfield Development in Daqing

基　　金：中石油股份公司重大科技专项“大庆探区非常规油气勘探开发关键技术研究与现场试验”(2012E-2603)

摘　　要：含气饱和度是气藏储量计算、储层评价的核心参数,更是储量参数研究中的难点,采用常规岩心分析技术无法准确地获取疏松岩心气体饱和度参数.通过对疏松保压岩心的超低温冷冻、流体收集、储层参数恢复、物性参数分析等技术研究,建立了疏松保压岩心气体饱和度分析技术,能够准确地获得储层气、水饱和度参数.在TB6-x1井实际应用中,求取储层岩石最大含气饱和度在75％以上,而且分析数据显示了不同岩性具有不同的气、水饱和度,饱和度总和在95％以上,真实地反映了天然气储层气、水分布规律,体现了技术的准确性与可行性.通过该井岩心分析弄清了储层不同岩性气水分布特征,为开展二次测井解释和建立测井解释图版奠定了基础.Abstract： Gas saturation is the core parameter of the reserve calculation and reservoir evaluation for gas reservoir, and moreover it is the study difficulty of the reserves parameters, the gas saturation parameter in a loose core can not be accurately obtained by means of the conventional core analyzing techniques. Through the technical studies such as ultra low temperature frozen, physical parameters analyses, fluids collection, reservoir parameters recover- y, etc. , the analyzing technique for the loose pressure core is established. This technique can accurately collect the saturation parameters of the gas and water. In the application of Well TB6-xl, a large amount of natural gas is col- lected, the gas saturation of the reservoir rocks is obtained, the maximum gas saturation is more than 75%, these achievements display the advanced nature of the technique ; and furthermore the analyzed data show that there are different saturations for different lithologies, the sum of the saturation is up to 95% or above, these results truely reflect and embody the distribution laws of the gas and water in the natural gas reservoirs, and the accuracy and fea- sibility of the gas saturation analyzing technique. Through the analyses of the well core, the characteristics of the gas and water distributions for the different lithologies are made clear and furthermore the shortage of the well log- ging interpretation in the low-abundance gas-bearing or poor-physical/lithologic-properties and high-shale contentintervals. These achievements have laid the foundation for carrying out the second logging interpretation and estab- lishing the interpreting chart boards.

关 键 词：疏松岩心 气饱和度 气、水分布 实验技术 

分 类 号：TE311[石油与天然气工程—油气田开发工程]