气候变化领域集成服务门户(CCPortal): Hydrocarbon accumulation conditions and favorable exploration zones in the Lunpola Basin, Tibet

CCPortal

DOI	10.3389/feart.2022.1034069
	Hydrocarbon accumulation conditions and favorable exploration zones in the Lunpola Basin, Tibet
	Zhang, Yunbo; Wang, Rui; Xu, Jie; Wu, Xinhe; Li, Yinglie; Lin, Yanhua; Wang, Buqing
发表日期	2023
EISSN	2296-6463
卷号	10
英文摘要	By systematically reviewing and summarizing the previous studies on the petroleum geology of the Lunpola Basin, combined with the latest oil and gas exploration results, the oil and gas accumulation conditions of this basin are summarized, and the favorable zones with the most exploration potential are pointed out. The results show that: ? The Paleogene mainly develops three sets of source rocks, including Niu-1 section, Niu-2 section and lower Niu-3 subsection. The lithology is mainly semi-deep and deep lacustrine gray-dark shale. Among them, the source rock of Niu-2 section is the best. However, the source rock of Niu-1 section is only developed in the Jiangjiacuo depression. The effective source rocks have the largest thickness in the central and western parts of the basin and have the best hydrocarbon-generating capacity. The thickness and abundance of the source rocks have decreased eastward. The organic matter are mainly Type I and Type II1, with a maturity of 0.58%-1.08%. ? The study area is dominated by clastic rock reservoirs, which can be divided into three types according to the strata distribution, and the overall reservoir conditions are not good. The reservoir porosity is between 0.1% and 32.6%, mainly between 2.0% and 10.0%, with an average of 6.5%; the permeability is between 0.0005 mD and 116.0 mD, mainly between 0.01 mD and 0.5 mD, which means ultra-low porosity and ultra-low permeable fracture-porous reservoirs. ? Three sets of seals are mainly developed in the Lunpola Basin, including two regional seals of the middle Niu-2 subsection and Dingqinghu section, and a direct seal of upper Niu-2 subsection. These three sets of seals are well developed and have good preservation conditions in the relatively stable central depression and the footwall of thrust nappe structural belt . ? The oil and gas reservoirs in the Lunpola Basin have the distribution law of structural traps in the north and south, and lithologic traps in the center . Structural traps are mainly distributed in the thrust nappe belt in the north and the Changshan uplift in the south, forming self-generation and self-storage or lower-generation and upper-storage reservoirs. While lithologic traps are mainly distributed in the central sag, forming self-generation and self-storage reservoirs. ? The source-reservoir-caprock combination conditions are good in the structural traps in the footwall of the northern thrust nappe belt and the lithologic traps in the southern slope belt of Jianjiacuo depression,, and they are the most favorable oil and gas exploration zones in the Lunpola Basin.
关键词	lunpola basin hydrocarbon accumulation conditions hydrocarbon accumulation pattern controlling factor favorable oil and gas exploration zones
英文关键词	GAS; OIL
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:000918806200001
来源期刊	FRONTIERS IN EARTH SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283391
作者单位	China Geological Survey; China University of Geosciences - Beijing
推荐引用方式 GB/T 7714	Zhang, Yunbo,Wang, Rui,Xu, Jie,et al. Hydrocarbon accumulation conditions and favorable exploration zones in the Lunpola Basin, Tibet[J],2023,10.
APA	Zhang, Yunbo.,Wang, Rui.,Xu, Jie.,Wu, Xinhe.,Li, Yinglie.,...&Wang, Buqing.(2023).Hydrocarbon accumulation conditions and favorable exploration zones in the Lunpola Basin, Tibet.FRONTIERS IN EARTH SCIENCE,10.
MLA	Zhang, Yunbo,et al."Hydrocarbon accumulation conditions and favorable exploration zones in the Lunpola Basin, Tibet".FRONTIERS IN EARTH SCIENCE 10(2023).