噻吩类化合物——判识海相原油类型和评价高演化碳酸盐岩烃源岩成熟度的理想生物标志物

Thiophene Compound—An Ideal Biological Marker to Distinguish Marine Crude Oil Type and Evaluate Maturity of Carbonate Source Rock with High Maturity

现被广泛应用的有机岩石学成熟度评价方法和有机地球化学成熟度参数在评价海相高演化碳酸盐岩烃源岩时具有很大的局限性。噻吩类化合物具有高度的热稳定性和抗微生物分解性,在碳酸盐岩中含量丰富,易于鉴定和定量计算,成熟度参数值跨度大,用其判识塔里木盆地原油的烃源岩类型、区分塔里木盆地高成熟原油的成熟度取得了良好的效果。通过进一步研究其成熟度参数与 R_0的关系,可望建立海相高演化碳酸盐岩成熟度评价标准和方法。

It is limited evaluating the marine carbonate source rock with high maturity by organic petrology and maturity parameter of organic geochemistry which are widely used at present. Because thiophene compound with high thermal-stability and antimicrobiological degradation is rich in carbonate rock,easy to be identified and quantitatively calculated,a great result has been achieved in identification of type of source rock from which crude oil of Tarim Basin came and distinguishment of maturity of high matured crude oil of Tarim Basin.It is believed that the maturity judgment criterion and ways in high matured marine carbonate rock in South China may be established by further studying the relationship between the maturity parameter and R_o..