干旱区生态环境知识资源中心(Arid): Impact of the Paleoclimate, Paleoenvironment, and Algae Bloom: Organic Matter Accumulation in the Lacustrine Lucaogou Formation of Jimsar Sag, Junggar Basin, NW China

Arid

DOI	10.3390/en13061488
	Impact of the Paleoclimate, Paleoenvironment, and Algae Bloom: Organic Matter Accumulation in the Lacustrine Lucaogou Formation of Jimsar Sag, Junggar Basin, NW China
	Jiang, Yuhan 1,2,3; Hou, Dujie 1,2,3; Li, Hang 4; Zhang, Ziming 1,2,3; Guo, Ruibo 1,2,3
通讯作者	Jiang, Yuhan ; Hou, Dujie
来源期刊	ENERGIES
EISSN	1996-1073
出版年	2020
卷号	13 期号:6
英文摘要	Shale oil exploration has been a key area of onshore oil and gas exploration in China in recent years. In this study, organic geochemistry and element geochemistry are united to study the shale oil and source rock in the Lucaogou formation of Jimusar sag, in order to reveal the paleoclimate, paleoenvironment, source of organic matter, and factors affecting organic matter accumulation and shale oil generation. The shale oil in the study area is mainly accumulated in two strata with good reservoir properties and oiliness, known as the upper sweet spot and lower sweet spot. Indexes of biomarkers and sensitive elements revealed the warm and semi-arid paleoclimate during Lucaogou formation, and the water column was brackish to salty. Water stratification caused a suboxic to anoxic environment in the deep-water column and coincided with the anoxic photic zone phenomenon. Compared with the lower sweet spot, the more humid climate, deeper and fresher water, and stronger water stratification characterize the upper sweet spot during sedimentation. This made the photic zone with freshwater more suitable for the reproduction of algae in the upper sweet spot. Meanwhile, the organic matter was well-preserved in the anoxic zone. Volcanic ash caused algae bloom, which promoted primary productivity and ensured the supply of organic matter. The composition and distribution pattern of biomarkers prove that phytoplankton is the most important source of organic matter in the study area and the contribution of higher plants is insignificant. The relationship between parameters of paleoproductivity and the redox condition versus total organic carbon (TOC) suggests that compared with the preservation conditions, the input of organic carbon is the most important controlling factor of organic matter accumulation in the study area.
英文关键词	shale oil geochemistry biomarkers volcanic ash aryl isoprenoids brackish lacustrine water
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000524096800036
WOS关键词	RARE-EARTH-ELEMENTS ; GREEN RIVER FORMATION ; TIGHT OIL-RESERVOIR ; JIMUSAR SAG ; DEPOSITIONAL ENVIRONMENT ; VOLCANIC ASH ; SOURCE-ROCK ; SONGLIAO BASIN ; GEOCHEMISTRY ; SHALE
WOS类目	Energy & Fuels
WOS研究方向	Energy & Fuels
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314393
作者单位	1.China Univ Geosci, Sch Energy Resources, Beijing 100083, Peoples R China; 2.China Univ Geosci, Key Lab Shale Gas Explorat & Evaluat, Minist Land & Resources, Beijing 100083, Peoples R China; 3.Beijing Key Lab Unconvent Nat Gas Geol Evaluat &, Beijing 100083, Peoples R China; 4.PetroChina Changqing Oilfield, Oil Recovery Plant 8, Xian 710016, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Yuhan,Hou, Dujie,Li, Hang,et al. Impact of the Paleoclimate, Paleoenvironment, and Algae Bloom: Organic Matter Accumulation in the Lacustrine Lucaogou Formation of Jimsar Sag, Junggar Basin, NW China[J],2020,13(6).
APA	Jiang, Yuhan,Hou, Dujie,Li, Hang,Zhang, Ziming,&Guo, Ruibo.(2020).Impact of the Paleoclimate, Paleoenvironment, and Algae Bloom: Organic Matter Accumulation in the Lacustrine Lucaogou Formation of Jimsar Sag, Junggar Basin, NW China.ENERGIES,13(6).
MLA	Jiang, Yuhan,et al."Impact of the Paleoclimate, Paleoenvironment, and Algae Bloom: Organic Matter Accumulation in the Lacustrine Lucaogou Formation of Jimsar Sag, Junggar Basin, NW China".ENERGIES 13.6(2020).