摘要
为准确评价湖相烃源岩的排油量及致密油资源潜力,结合湖相I型有机质的黄金管热模拟实验和青山口组烃源岩的有机地球化学分析,对松辽盆地湖相烃源岩生烃特征、动力学参数和排油效率进行了研究。热模拟实验的产物定量结果表明,松辽盆地青山口组湖相烃源岩具有可观的生油潜力,最大生油量约为600 mg/g·TOC,主要的生油阶段在Easy Ro=0.5%~1.2%。动力学计算结果表明,该烃源岩生油的平均活化能为218.5 k J/mol,重质组分生成活化能要低于轻质组分。结合青山口组烃源岩的生油动力学参数和英X58井热史的地质推演,证实该井湖相烃源岩的当前生油转化率为40%~60%,生油量为240~360 mg/g·TOC;通过残留烃的定量,计算得到该烃源岩的排油量为150~200mg/g·TOC,相对排油效率约为60%。生油量及排油效率结果表明,松辽盆地致密油资源潜力大。
To evaluate the yields of oil and the potential of tight oil resources of lacustrine source rocks, the characteristics of hydrocarbon generation, kinetic parameters, and the efficiency of petroleum expulsion of lacustrine source rocks in the Songliao Basin were studied in this paper, by using the gold-tube pyrolysis of lacustrine Type-I organic matters and organic geochemical analysis of the Qingshankou Formation source rocks. Quantitative determination of the liquid and gas products from pyrolysis experiments indicate that there is a considerable oil generation potential for the Qingshankou Formation source rock in the Songliao Basin with maximum yields of oil about 600 mg/g·TOC. Kinetic calculation shows that the average activation energy for oil generation from this source rock is 218.5 kJ/mol, wherein, the activation energy for the generation of heavy components is obviously lower than that of light parts. Geological extrapolation based on the kinetic parameters and the thermal history of well YX58, demonstrates that the present generation conversion and amounts of oil for the source rocks of tight oils in this well are 40% to 60% and 240 to 360 mg/g·TOC, respectively. By determination of the residual hydrocarbons, the expulsion amounts and efficiency of oils for this source rocks can be calculated to be 150 to 200 mg/g·TOC and 25% to 33%, respectively. It is shown that tight oil resources are of great potential in the Songliao Basin.
出处
《现代地质》
CAS
CSCD
北大核心
2016年第3期627-634,共8页
Geoscience
基金
国土资源部公益性行业科研专项基金项目(201311022)
"十二五"国家科技重大专项(2011ZX05007-001
2011ZX05007-002)
教育部高等学校博士学科点基金项目(20110023110017)
中国石油天然气股份有限公司科学研究与技术开发项目(2012E-2603-06)
关键词
湖相烃源岩
黄金管热模拟
生烃动力学
排油效率
松辽盆地
lacustrine source rock
gold-tube pyrolysis
hydrocarbon generation kinetics
the efficiency of petroleumexpulsion
the Songliao Basin
