T区块西部地区烃源岩有机质类型及丰度研究

Study on Types and Abundance of Organic Matter in Source Rocks in Western Area of T Block

本次研究利用有机显微组分鉴定、定量统计、干酪根元素分析等方法对T区块西部烃源岩有机质类型进行了分析,并对其丰度进行了评价,综合认为:(1)研究区中萨卡组及下萨卡组暗色泥岩的有机质类型以III型为主,II2型为辅;(2)研究区中萨卡组及下萨卡组氯仿沥青"A"和生烃潜量均较低,总体评价为差-中等烃源岩。

In this paper,the organic matter types of source rocks in T block are analyzed by means of whole rock optical slice organic macerals identification,quantitative statistics and kerogen element analysis,and their abundance is evaluated.It is concluded that:(1) The organic matter types of dark mudstones in Saka Formation and Lower Saka Formation in the study area are mainly of type III,but few of them are of type III.Amount II 2;(2) The chloroform asphalt "A" and hydrocarbon generation potential of Saka Formation and Lower Saka Formation in the study area are low,and the overall evaluation is poor to medium source rocks.