Molecular fossils and oil-source rock correlations in Tarim Basin, NW China

Zhang, Shuichang; Duan, Liang; Li, Maowen; Xiao, Zhongyao; He, Zhanxiang

doi:10.1007/bf02902814

Cited by 71 publications

(36 citation statements)

References 11 publications

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“…Comparison of hydrocarbon steranes and terpanes of Rewapu area. RP3,oil RP4,oil which is consistent with feature of the crude oil from middle and upper Ordovician with normal maturity in Halahatang region (Zhang et al, 2000;2002;Zhu et al, 2012c). Therefore, oil and gas in Rewapu derives from middle and upper Ordovician hydrocarbon source rock.…”

Section: Gas Properties Oil Propertiessupporting

confidence: 66%

Geology and Hydrocarbon Accumulation of the Large Ultra-Deep Rewapu Oilfield in Tarim Basin, China

Zhu

Liu

Zheng

et al. 2015

Energy Exploration & Exploitation

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Over the past five years, oil and gas exploration to marine facies carbonate rock in China took on a fast-growing tendency, and a lot of large-scale oil and gas fields were discovered in succession. Particularly in the north of Tarim Basin, the large-scale Rewapu oil field was recently discovered in the Ordovician carbonate rock layer system with buried depth of 7,000 meters, manifesting that a significant potential of exploration exists in Tarim Basin's deep layer and ultra deep layer of Tarim basin. The results indicate that reservoirs of Rewapu oilfield are low porosity and low permeability layers karst reservoirs, reservoir temperature is around at 160 ℃ with oil, and the crude oil comes from the upper Ordovician source rock of the Manjaer depression. The hydrocarbon accumulation time is in the Late Permian, and since the Triassic sedimentation, the reservoir is in the continuous process of burying. It belongs to the old oil and gas system. Due to low geothermal gradient and late quick deep burial, oil reservoir has yet to be cracked, so well-preserved old oil reservoir can be discovered at the depth of 7000 m. The Ordovician carbonate reservoir in Rewapu was a fracture-cavity oil reservoir, and the oil and gas distribution and enrichment are controlled not by the local structure, but by the distribution and the development degree of Ordovician carbonate reservoir. The reservoirs of Rewapu block are mainly distributed in the Ordovician Yijianfang formation and at the top Yingshan formation, and the reservoir development degree was controlled by the karstification, the degree of fracture development and the sedimentation facies, concentrating into belts in plane and not controlling by the depth vertically. The overlying strata are limestone of Tumuxiuke formation and marls and limestone of Sangtamu formation in the upper Ordovician. Rewapu oil reservoir features stratified oil and mainly contains normal oil with low viscosity and high wax. Research results show that Ordovician reservoirs in Rewapu block have relatively large depth of burial, but they are still favorable in quality and sit along the path for the oil and gas's northward migration. Therefore, this block has immense resources potential and boasts good exploration and development outlook. In this paper, we study Rewapu block oil reservoir's geological features and hydrocarbon accumulation mechanism, which is of important significance for directing the exploration to oil and gas at the deep layer and ultra deep layer of Tarim Basin.

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Section: Gas Properties Oil Propertiessupporting

confidence: 66%

Geology and Hydrocarbon Accumulation of the Large Ultra-Deep Rewapu Oilfield in Tarim Basin, China

Zhu

Liu

Zheng

et al. 2015

Energy Exploration & Exploitation

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show abstract

“…Disputes focus mainly on identifying the dominant source and quantifying the relative contribution from each source. Previous studies Hanson et al, 2000;Zhang et al, , 2002aZhang et al, , 2004a emphasized the contribution from the Middle-Upper Ordovician source rock; however, the huge petroleum resources present do not match the limited distribution of the Middle-Upper Ordovician source rocks (Cai et al, 2009a). Additional research (Sun et al, 2003(Sun et al, , 2004Cai et al, 2009b) argued that the Cambrian-Lower Ordovician source rocks might be the most important contributor, based on analysis of aryl isoprenoids or sulfur isotopes.…”

Section: Introductionmentioning

confidence: 94%

Multiple-sourced features of marine oils in the Tarim Basin, NW China – Geochemical evidence from occluded hydrocarbons inside asphaltenes

Tian¹,

Zhao²,

Yang³

et al. 2012

Journal of Asian Earth Sciences

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“…It has become the biggest palaeozoic marine oil field (Tahe-Lunnan 100 million ton oil field) as a result of large-scale explorations of 30 years in the Tarim Basin. Due to the importance of Ordovician marine source rocks in the global exploration of Paleozoic petroleum resources and the con-sideration of the actual results of the basin biomarker oilsource correlation of compounds, most geochemists believe that the Middle and Upper Ordovician source rocks are the major source rocks of marine crude oil in the Tarim Basin [14][15][16][17][18][19][20]. There are a great amount of geochemical evidences such as molecules and isotope that prove the fact that the Cambrian-Lower Ordovician source rocks had significant contributions to the Lower Paleozoic petroleum systems which have been found so far [21][22][23][24][25].…”

mentioning

confidence: 99%

Identification of the Kukersite-type source rocks in the Ordovician Stratigraphy from the Tarim Basin, NW China

et al. 2013

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Molecular fossils and oil-source rock correlations in Tarim Basin, NW China

Cited by 71 publications

References 11 publications

Geology and Hydrocarbon Accumulation of the Large Ultra-Deep Rewapu Oilfield in Tarim Basin, China

Geology and Hydrocarbon Accumulation of the Large Ultra-Deep Rewapu Oilfield in Tarim Basin, China

Multiple-sourced features of marine oils in the Tarim Basin, NW China – Geochemical evidence from occluded hydrocarbons inside asphaltenes

Identification of the Kukersite-type source rocks in the Ordovician Stratigraphy from the Tarim Basin, NW China

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