Origin and source of Jurassic crude oil in well Pen-1 western Depression, Junggar Basin

被引：2
|
作者：
Liu H. [1 ,2 ]
Meng X. [1 ]
Ren X. [3 ]
Cheng B. [1 ]
Cheng C. [3 ]
Deng X. [3 ]
Zhang H. [1 ]
Fang X. [3 ]
机构：
[1] School of Geosciences in China University of Petroleum (East China), Qingdao
[2] Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao
[3] Exploration and Development Research Institute, Shengli Oilfield Company, SINOPEC, Dongying
来源：
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2023年 / 47卷 / 01期
关键词：
accumulation process; biomarker; genesis of petroleum; geochemical characteristics of crude oil; Junggar Basin;
D O I：
10.3969/j.issn.1673-5005.2023.01.003
中图分类号：
学科分类号：
摘要：
Multiple sets of source rocks and multi-stage hydrocarbon generation and expulsion process in Junggar Basin lead to the complexity of crude oil source. Geochemical characteristics and origin of the crude oil in the well Pen-1 western depression were determined by using the data of crude oil physical properties and gas chromatography-mass spectrometry. The results show that there are three types of crude oil in the study area: the type Ⅰ crude oils have the characteristics of high content of 25-norhopane, high content of gammacerane and high slope "ascending" tricyclic terpanes. They are the main generation window stage of organic matter formation in strong reduction sedimentary environment and come from source rocks of Fengcheng Formation. Type Ⅱ and type Ⅲ crude oils have low content of gammacerane and distribution characteristics of " peak type" or " weak rising type" tricyclic terpanes, and are formed from organic matter in weakly reduced sedimentary environment. The crude oils mainly come from source rocks of Lower Wuerhe Formation, mixed with degraded crude oils from Fengcheng Formation. Among them, the type Ⅱ crude oils belong to the main generation window stage, while the type Ⅲ crude oils belong to the high and over-mature stage. The reservoir has the characteristics of multi-stage charging. The type Ⅰ crude oil accumulated in the middle and late Jurassic was widely distributed, but suffered from intense biodegradation and made little contribution to reservoir formation. The type Ⅱ crude oil accumulated in the late Cretaceous can migrate in the sand body for a long distance and mostly converge in the uplift area. In the Neogene, the physical properties of reservoirs became worse, and it was difficult for crude oil to migrate over long distances. The type Ⅲ crude oil accumulated in this period mainly formed near fault zones. © 2023 University of Petroleum, China. All rights reserved.
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页码：25 / 37
页数：12
相关论文
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