摘要：The Fukang Sag in the Junggar Basin is an important petroleum exploration and exploitation region. However, the geothermal regime and tectono-thermal evolution of the Fukang Sag, which control its hydrocarbon generation and conservation, are still controversial. This study involved a systematic analysis of the present-day geothermal gradient, heat flow, and thermal history of the Fukang Sag for better further exploration. According to the well log data and well-testing temperature data, we calculated that the geothermal gradient of the Fukang Sag ranges from 16.6 degrees C/km to 29.6 degrees C/km, with an average of 20.8 degrees C/km, and the heat flow ranges from 34.6 mWm-2 to 64.3 mWm-2, with an average of 44.6 mWm-2. Due to the basement relief, they decrease from northeast to southwest. The weight averages of the single-grain apatite (U-Th)/He ages of the core samples are 1.3-85.2 Ma, and their apatite fission track ages range from 50.9 Ma to 193.8 Ma. The thermal modeling results revealed that the Fukang Sag experienced late Permian, late Jurassic, and late Cretaceous cooling events (although the timing and magnitude of these events varied among the samples), which were related to the continuous compression of the Junggar Basin. In addition, basin modeling indicated that the heat flow of the Fukang Sag decreased from 80 mWm-2 in the Carboniferous to the current value of 44.6 mWm-2. The Fukang Sag's edge exhibits prolific hydrocarbon generation in the Carboniferous-Permian source rocks, while the Jurassic source rocks within the sag also undergo abundant hydrocarbon generation. This study provides new insights into the present-day geothermal field and tectono-thermal evolutionary history of the Fukang Sag, which are significant in terms of regional tectonic evolution and oil and gas resource assessment.

关键字：Fukang Sag; geothermal gradient; heat flow; thermochronometry; thermal history; tectono-thermal evolution; maturity evolution

ISSN号：2075-163X

卷、期、页：卷: 14期: 3

发表日期：2024-03-01

影响因子：0.000000

期刊分区（SCI为中科院分区）：三区

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：MINERALS

参与作者：郭华军,彭博,单祥

通讯作者：李晨星,徐甲博,张泽

第一作者：常健

论文类型：期刊论文

论文概要：郭华军,李晨星,彭博,单祥,徐甲博,张泽,常健，Present-Day Geothermal Regime and Thermal Evolution of the Fukang Sag in the Junggar Basin, Northwest China，MINERALS，2024，卷: 14期: 3

论文题目：Present-Day Geothermal Regime and Thermal Evolution of the Fukang Sag in the Junggar Basin, Northwest China