基于“Van Kerevenlen”图解的干酪根类型及成熟度数值化分析方法

Numerical Analysis Method for the Type and Maturity of Kerogen Based on“Van Kerevenlen”Diagram

为了弥补"Van Kerevenlen"图版的不足,提出了建立干酪根类型数学模型和干酪根成熟度数学模型。验证干酪根类型数学模型时,计算了23个样品(6个地区);验证干酪根成熟度数学模型时,计算了35个样品(9个地区)。从计算结果来看,所建立两个数学模型计算结果和试验测试结果基本相符,说明新建模型是可靠的,是对"Van Kerevenlen"图版确定干酪根类型和成熟度的一个补充。同时避免了矿物基质、沥青污染和芳构化程度等因素对确定干酪根类型和成熟度的影响,降低了试验测试所导致的误差,弥补了高-过成熟度样品干酪根类型和成熟度确定的难题,实现了干酪根类型和成熟度数值化计算。

The determination of type and Roof kerogen was one of the key problems in geosciences.At present,the kerogen's type and Rovalue were determined by Van Kerevenlen chart board(H/C,O/C),but it was slow to determine them had certain error in the determination.To compensate the lacks of Van Kerevenlen chart board,it was proposed that mathematical models were established for calculating the kerogen's type and Ro.In verifying the mathematical model of its types,23 samples from 6different regions were calculated;in verifying the Ro model,35 samples from 9different regions were calculated.The calculation result shows that calculation values are agree with those of testings,the model is reliable,and the mathematical models can determine the kerogen's type and Ro.The models not only can supplement the Van Kerevenlen chart board,but also avoid the testing error of kerogen's type and Ro,reduce the impact of mineral matrix/asphalt pollution/aromatization on the calculation of kerogen's type and Ro,the digitalized calculation of kerogen's type and Rois realized.