生烃动力学模拟在页岩油原位转化中的应用  

Kinetic simulation of hydrocarbon generation and its application to in-situ conversion of shale oil

作　　者：张斌 于聪[1,2] 崔景伟 米敬奎[1,2] 李化冬[1] 贺飞 ZHANG Bin;YU Cong;CUI Jingwei;MI Jingkui;LI Huadong;HE Fei(Key Laboratory of Petroleum Geochemistry,CNPC,Beijing 100083,China;Research Institute of Petroleum Exploration&Development,PetroChina,Beijing 100083,China;Shale Oil Research&Development Center,Research Institute of Petroleum Exploration&Development,PetroChina,Beijing 100083,China)

机构地区：[1]中国石油天然气集团有限公司油气地球化学重点实验室,北京100083 [2]中国石油勘探开发研究院,北京100083 [3]中国石油勘探开发研究院页岩油研发中心,北京100083

出　　处：《石油勘探与开发》2019年第6期1212-1219,共8页Petroleum Exploration and Development

基　　金：中国石油天然气股份有限公司重大科技专项(2016E-0101);中国石油勘探开发研究院科学研究与技术开发项目(2018-ycq02)

摘　　要：选取松辽盆地西北部的白垩系嫩江组、鄂尔多斯盆地西南部的三叠系延长组7段、柴达木盆地西南部的古近系、准噶尔盆地东部吉木萨尔凹陷的二叠系芦草沟组4块典型页岩样品,通过生烃动力学实验模拟和数值计算,确定其有机质生烃动力学参数。结果表明,有机质生烃活化能与成熟度密切相关,主要分布在197~227 kJ/mol。以此为基础,计算了页岩加热转化生烃所需要的温度。结果表明,在恒温加热条件下,较为理想的加热温度是270~300℃,经过50~300 d即可达到90%以上的成烃转化率。持续恒速升温速率条件下,在1~150℃/月升温速率条件下,主生烃期对应的温度在225~350℃。为了获得较高的经济效益,建议采用相对较快的升温速率(60~150℃/月)。通过实际样品生烃动力学模拟和计算,获得了较为可靠的动力学参数,可以为页岩油地下原位加热转化提供更加合理的加热方案。The kinetic parameters of hydrocarbon generation are determined through experimental simulation and mathematical calculation using four typical samples selected from the Cretaceous Nenjiang Formation in the northwest of Songliao Basin,Chang 7 Member of Triassic Yanchang Formation in the southwest of Ordos Basin,Paleogene in the southwest of Qaidam Basin,and Lucaogou Formation of Jimusar Sag in the east of Junggar Basin.The results show that activation energy of hydrocarbon generation of organic matter is closely related to maturity and mainly ranges between 197 kJ/mol and 227 kJ/mol.On this basis,the temperature required for organic matter in shale to convert into oil was calculated.The ideal heating temperature is between 270℃and 300℃,and the conversation rate can reach 90%after 50300 days of heating at constant temperature.When the temperature rises at a constant rate,the temperature corresponding to the major hydrocarbon generation period ranges from 225 to 350℃at the temperature rise rate of 1150℃/month.In order to obtain higher economic benefits,it is suggested to adopt higher temperature rise rate(60150℃/month).The more reliable kinetic parameters obtained can provide a basis for designing more reasonable scheme of in-situ heating conversion.

关 键 词：生烃动力学 页岩油 活化能 原位转化 二叠系芦草沟组 三叠系延长组7段 白垩系嫩江组 生烃模拟 

分 类 号：TE122.2[石油与天然气工程—油气勘探]