泥页岩对不同赋存状态页岩气的容烃能力定量表征——以伊通盆地双阳组为例  

The Quantitative Characterization of Containing Gas Abilities in Shale with Different Occurrence States——a Case Study of Shuangyang Formation in Yitong Basin

作　　者：黄铭志 

机构地区：[1]中国石油吉林油田分公司勘探开发研究院,松原138000

出　　处：《科学技术与工程》2015年第20期35-41,共7页Science Technology and Engineering

基　　金：国家自然科学基金(41172134);国家自然科学基金(41402109);中央高校基本科研业务费专项资金(27R1421002A)资助

摘　　要：由于页岩气在泥页岩储层中以多种方式赋存,在开展页岩气资源评价时,需定量表征泥页岩对不同赋存状态页岩气的容烃能力。基于泥页岩等温吸附试验,评价不同丰度、不同成熟度泥页岩的吸附气能力;并通过温、压校正转换至任一温度、任一压力下泥页岩的吸附气能力。借助Vasquez-Beggs模型,评价地质条件下油溶气能力,分析页岩气中不同赋存状态下页岩气含量的比例关系,推算出游离气量。研究表明,在压力达到一定后,泥页岩最大吸附能力主要受到有机质含量的制约;而油溶气量除了受到温、压和原油数量的影响外,气在原油中的溶解度同样至关重要。从伊通盆地评价结果来看,双阳组页岩气最多可达到5 703.74亿m3,其中主要吸附态赋存于泥页岩储层中,其次为游离态页岩气,油溶气量较少,仅为165.54亿m3。Since the gas occurred in shale with various states, during the evaluation of shale gas resources, it is necessary that the containing gas abilities in shale with different occurrence states are characterized quantitatively. Based on the isothermal adsorption experiment of shale, the adsorption gas ability of shale with different organic matter abundance and maturity is evaluated. Through the temperature and pressure correction, the adsorption gas a- bility of shale is available at any temperature and pressure. Using the Vasquez-Beggs model, the ability of oil dis- solved gas is evaluated in geological conditions. Then on the basic of the shale gas content proportion in different occurrence states, the free gas amount can be calculated. The results show that the adsorption gas amount is mainly restricted by the organic matter content when the pressure achieved a certain value. Except the temperature, the pressure and the oil quantity, the solubility of gas in crude oil is also very important. From the evaluation of Shuan- gyang formation in Yitong Basin, the resource of shale gas is about 5 703.74 × 10^8 m^3. The most of which is adsorption gas. The second is the free gas. The amount of dissolved gas in oil is less, and it is only about 165.54 × 10^8 m^3.

关 键 词：页岩气 吸附气 游离气 溶解气 伊通盆地 

分 类 号：TE122.23[石油与天然气工程—油气勘探]