摘要：The source of oil and gas in the Tarim Basin's platform has always been controversial. The Lower Cambrian Yurtusi Formation and the Xidashan Formation-Xishanbulak Formation argillaceous source rocks are an important set of oil source series in the basin. Based on the principle of conservation of matter, this paper calculates the hydrocarbon expulsion amount of the source rock. Using a phase state hydrocarbon expulsion amount characterization model, the paper reconstructs the evolution process of the hydrocarbon expulsion phase state of the source rock. According to the characterization model of hydrocarbon expulsion dynamics, the relative contribution of each force to hydrocarbon expulsion is evaluated. The hydrocarbon expulsion geologic model of argillaceous source rocks in the Lower Cambrian in the Tarim Basin is established. The results show that this set of source rocks can serve the main source rocks in the basin. The hydrocarbon expulsion of the Lower Cambrian argillaceous source rocks in the Tarim Basin can be divided into three stages. In the first stage, the hydrocarbon expulsion phase is dominated by the water-soluble and diffusion phases. The conversion of clay minerals into dehydration and diffusion forces is the main driving force for the hydrocarbon expulsion. In the second stage, the oil and gas expulsion present the characteristics of multiphase and multidynamic coexistence. In the third stage, the phase state of oil and gas expulsion is mainly free phase. The capillary force difference and the thermal expansion force of the fluid rock are the main driving forces for oil and gas expulsion. The research results of this paper can deepen the understanding of the hydrocarbon expulsion mechanism of the set of source rocks, and then guide oil and gas exploration. This paper obtains the hydrocarbon expulsion amount of the source rock. This paper restores the evolution process of the hydrocarbon expulsion phase state of the source rock. The relative contribution of each expulsion dynamics to hydrocarbon expulsion is evaluated. image

关键字：driving forces of hydrocarbon expulsion; hydrocarbon expulsion efficiency; hydrocarbon expulsion phase state; Lower Cambrian source rocks evaluation; Tarim Basin

ISSN号：0072-1050

卷、期、页：卷59期7：1998-2021

发表日期：2024-07-01

期刊分区（SCI为中科院分区）：四区

收录情况：SCI（科学引文索引印刷版）,SCIE（科学引文索引网络版）

发表期刊名称：GEOLOGICAL JOURNAL

参与作者：张心罡,罗金洋,杨海军,李佳润

通讯作者：施砍园,施砍园

第一作者：陈君青,庞雄奇,庞博,姜福杰

论文类型：期刊论文

论文概要：陈君青,施砍园,张心罡,庞雄奇,罗金洋,庞博,姜福杰,杨海军,李佳润,施砍园，Hydrocarbon expulsion mechanism of Lower Cambrian argillaceous source rocks in the Tarim Basin, China，GEOLOGICAL JOURNAL，2024，卷59期7：1998-2021

论文题目：Hydrocarbon expulsion mechanism of Lower Cambrian argillaceous source rocks in the Tarim Basin, China