页岩含油量热解分析关键技术  

Key technologies for pyrolysis analysis of shale oil content

作　　者：曹婷婷 蒋启贵[1,2,3] 钱门辉 刘鹏[1,2,3] 李志明 陶国亮[1,2,3] 黎茂稳 Cao Tingting;Jiang Qigui;Qian Menhui;Liu Peng;Li Zhiming;Tao Guoliang;Li Maowen(State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development,Beijing 100083,China;Wuxi Research Institute,Sinopec Petroleum Exploration and Production Research Institute,Jiangsu Wuxi 214126,China;Sinopec Key Laboratory of Petroleum Accumulation Mechanisms,Jiangsu Wuxi 214126,China)

机构地区：[1]页岩油气富集机理与有效开发国家重点实验室,北京100083 [2]中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所,江苏无锡214126 [3]中国石油化工集团公司油气成藏重点实验室,江苏无锡214126

出　　处：《石油学报》2023年第2期329-338,共10页Acta Petrolei Sinica

基　　金：国家自然科学基金项目“陆相富有机质页岩成烃动态演化与烃类赋存机理”(No.42090022);中国石油化工股份有限公司科技部项目“准噶尔盆地石炭—二叠系潜力评价与目标优选”(P21077-1)资助。

摘　　要：快速定量表征页岩游离油、束缚油含量是页岩含油性及页岩油可动性评价的重要基础需求,但目前的相关实验测试技术仍存在许多瓶颈:(1)样品在前处理过程中无法避免轻质油的散失,导致游离油含量测试结果严重偏低;(2)由于页岩中游离油与束缚油没有明确的物理化学边界,并且存在一定的动态转化,因此难以界定并准确定量表征。针对上述问题,对热解分析测试中页岩岩心样品保存、前处理以及页岩热解分析条件3项关键技术进行实验研究和应用论证,并形成一套页岩含油量热解分析方法。该方法建立了出筒岩心样品采集与低温保存流程,研制了密闭冷冻样品前处理制备技术,有效地避免了轻质油的损失;通过优化热解升温程序,实现了页岩油与束缚油的科学定量表征。目前该方法已在多个油田得到应用、验证和推广。To fast quantitatively characterize the content of shale free oil and absorbed oil is an important fundamental demand for evaluations on shale oil content and mobility, but bottlenecks still remain in terms of relevant experimental testing technique. On one hand, the loss of light oil is inevitable during the pretreatment of samples, thus leading to extremely low test results of free oil content;on the other hand, there is no clear physical and chemical boundary between free oil and absorbed oil in shale and there is certain dynamic transformation, so it is difficult to define and quantitatively characterize the oil contents accurately. In response to the above problems, we have performed experimental study and application demonstration for the three key technologies regarding preservation of shale core samples, pretreatment, and conditions for pyrolysis analysis of shale in the pyrolysis analysis test, and developed a set of pyrolysis analysis methods of shale oil content. This method has established the process of collection and low-temperature preservation of core samples, and developed the pretreatment and preparation technology of closed frozen samples to effectively avoid the loss of light oil;through optimizing the pyrolysis heating program, scientific quantitative characterization of shale oil and absorbed oil has been realized. At present, this method has been applied, verified and promoted in a number of oil fields.

关 键 词：页岩油 游离油 束缚油 含油量 热解分析 

分 类 号：TE135[石油与天然气工程—油气勘探]