Origin of deep oil accumulations in carbonate reservoirs within the north Tarim Basin: Insights from molecular and isotopic compositions

The Uyghurs (Chinese Huihe迴紇, Huihu回鶻) were a pastoral nomadic people living in the region of the Selenga and Orkhon river valleys in modern Mongolia; they spoke a Turkic language. The empire that they created on the steppe lasted for nearly a century (744–840) and played an important role, both politically and culturally, in East Asia. Centered on the Mongolian Plateau, the Uyghur Empire at its height controlled numerous other peoples within a territory that included lands to the north in the modern regions of Tuva and Buryatia, as well as some parts of the northern Tarim Basin and eastern Inner Mongolia.1 During its eventful history, the Uyghur Empire sent cavalry to help the Tang Dynasty put down the An Lushan rebellion, maintained strong political and economic ties with China, fought with the Tibetan Empire for control of important international trade routes, built cities on the steppe, celebrated its rulers’ achievements in stone stelae, and—uniquely in the world—adopted Manichaeism as its state religion. After their empire collapsed, the Uyghurs developed new polities in Gansu and the Tarim Basin that continued to exercise influence in Inner Asia.

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Structural geometry and evolution of an intracratonic strike-slip fault zone: A case study from the north SB5 fault zone in the Tarim Basin, China

Journal of Structural Geology ◽

10.1016/j.jsg.2020.104159 ◽

2020 ◽

Vol 140 ◽

pp. 104159

Author(s):

Changyu Teng ◽

Zhongxian Cai ◽

Fang Hao ◽

Zicheng Cao

Keyword(s):

Fault Zone ◽

Tarim Basin ◽

Strike Slip ◽

Strike Slip Fault ◽

Structural Geometry ◽

The North

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Formation and Controlling Factors of Effective Weat-hered Crust Carbonate Reservoirs-taking the Yingmaili-Yaha Area of Tarim Basin as an Example

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/585/1/012082 ◽

2019 ◽

Vol 585 ◽

pp. 012082

Author(s):

Huanhuan Wang

Keyword(s):

Tarim Basin ◽

Controlling Factors ◽

Carbonate Reservoirs

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Hydrocarbon-bearing characteristics of the SB1 strike-slip fault zone in the north of the Shuntuo Low Uplift, Tarim Basin

Petroleum Geoscience ◽

10.1144/petgeo2019-144 ◽

2020 ◽

Vol 27 (1) ◽

pp. petgeo2019-144

Author(s):

Ziyi Wang ◽

Zhiqian Gao ◽

Tailiang Fan ◽

Hehang Zhang ◽

Lixin Qi ◽

...

Keyword(s):

Fault Zone ◽

Tarim Basin ◽

Oil And Gas ◽

Strike Slip ◽

Strike Slip Fault ◽

Hydrocarbon Exploration ◽

Phase Iii ◽

Permeability Barrier ◽

The North ◽

Migration Pathways

The SB1 strike-slip fault zone, which developed in the north of the Shuntuo Low Uplift of the Tarim Basin, plays an essential role in reservoir formation and hydrocarbon accumulation in deep Ordovician carbonate rocks. In this research, through the analysis of high-quality 3D seismic volumes, outcrop, drilling and production data, the hydrocarbon-bearing characteristics of the SB1 fault are systematically studied. The SB1 fault developed sequentially in the Paleozoic and formed as a result of a three-fold evolution: Middle Caledonian (phase III), Late Caledonian–Early Hercynian and Middle–Late Hercynian. Multiple fault activities are beneficial to reservoir development and hydrocarbon filling. In the Middle–Lower Ordovician carbonate strata, linear shear structures without deformation segments, pull-apart structure segments and push-up structure segments alternately developed along the SB1 fault. Pull-apart structure segments are the most favourable areas for oil and gas accumulation. The tight fault core in the centre of the strike-slip fault zone is typically a low-permeability barrier, whilst the damage zones on both sides of the fault core are migration pathways and accumulation traps for hydrocarbons, leading to heterogeneity in the reservoirs controlled by the SB1 fault. This study provides a reference for hydrocarbon exploration and development of similar deep-marine carbonate reservoirs controlled by strike-slip faults in the Tarim Basin and similar ancient hydrocarbon-rich basins.

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