扩散在沉积岩中的镜煤素的反射率显微镜测定标准试验方法

详细信息   

• 标准号：ASTM D7708-2011
• 发布日期：2011
• 英文题名：Standard Test Method for Microscopical Determination of the Reflectance of Vitrinite Dispersed in Sedimentary Rocks
• 英文主题词：dispersed organic matter ; gas ; hydrocarbons ; oil ; thermal maturity ; vitrinite reflectance
• 标准状态：现行
• 发布单位：US-ASTM
• 国际标准分类号：91.100.15
• 载体形态：8P.;A4
• 中国标准分类号：D04
• 国别：美国材料与试验协会

文摘

The mean reflectance of the vitrinite maceral in sedimentary rocks as determined by this test method is used as an indicator of thermal maturity, that is, the progressive geochemical alteration of dispersed organic material experienced during diagenesis, catagenesis, and metagenesis. In the case of hydrocarbon source rocks, three major categories of thermal maturity are defined by vitrinite reflectance: immature (R_oran x2264; 0.5%), mature (R_oran x2248; 0.5-1.35%), and overmature (R_oran x2265; 1.35%) with respect to the generation of liquid hydrocarbons. Thermal maturity as determined by the reflectance of vitrinite dispersed in sedimentary rocks is similar to the rank classification of coals as presented in Classification D388 and measured similarly to the reflectance of vitrinite in coal as presented in Test Method D2798. The mean reflectance of the vitrinite maceral in sedimentary rocks correlates with geochemically determined parameters of thermal maturity and can be used to characterize thermal maturation history, to calibrate burial history models, and to better understand the processes of hydrocarbon generation, migration, and accumulation in conventional and unconventional petroleum systems.

1.1 This test method covers the microscopical determination of the reflectance measured in oil of polished surfaces of vitrinite dispersed in sedimentary rocks. This test method can also be used to determine the reflectance of macerals other than vitrinite dispersed in sedimentary rocks.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.