Reservoirs Distribution and Hydrocarbon Accumulation of Ordovician Carbonate in Tazhong Uplift, Tarim Basin

2011 ◽  
Vol 130-134 ◽  
pp. 3195-3199
Author(s):  
Mei Tao Chen ◽  
Ning Yang ◽  
Shang Ming Yang
Keyword(s):  
Tarim Basin ◽  
Carbonate Reservoirs ◽  
Hydrocarbon Accumulation ◽  
Upper Ordovician ◽  
Marine Carbonate ◽  
Lower Ordovician ◽  
Different Types ◽  
Tazhong Uplift

Many types of marine carbonate reservoirs are discorvered in Tazhong Uplift, and the later alteration is obvious. The marine sources rock including the Cambrian-lower Ordovician and the mid-upper Ordovician provided a great deal of hydrocarbon for the hudrcarbon accumulation. The hydrocarbon filled into all kinds of reservoirs many times to form the different types of reservoirs in later Caledonian to early Hercynian epoch, later Hercynian to early Indo-Chinese epoch, later Yanshanian to Himalayan epoch. All these made the characteristics of hydrocarbon accumulation complex very much.

scholarly journals Paleozoic Carbonate Hydrocarbon Accumulation Zones in Tazhong Uplift, Tarim Basin, Western China

2009 ◽  
Vol 27 (2) ◽  
pp. 69-90 ◽  
Author(s):  
Xiuxiang Lü ◽  
Weiwei Jiao ◽  
Xinyuan Zhou ◽  
Jianjiao Li ◽  
Hongfeng Yu ◽  
...  
Keyword(s):  
Tarim Basin ◽  
Oil And Gas ◽  
Carbonate Reservoirs ◽  
Source Rocks ◽  
Western China ◽  
Hydrocarbon Accumulation ◽  
Upper Ordovician ◽  
Marine Carbonate ◽  
Marine Source ◽  
Tazhong Uplift

Diverse types of marine carbonate reservoirs have been discovered in the Tazhong Uplift, Tarim Basin, and late alteration of such reservoirs is obvious. The marine source rocks of the Cambrian-lower Ordovician and the middle-upper Ordovician provided abundant oil and gas for hydrocarbon accumulation. The hydrocarbons filled various reservoirs in multiple stages to form different types of reservoirs from late Caledonian to early Hercynian, from late Hercynian to early Indosininan and from late Yanshanian to Himalayan. All these events greatly complicated hydrocarbon accumulation. An analysis of the discovered carbonate reservoirs in the Tazhong Uplift indicated that the development of a reservoir was controlled by subaerial weathering and freshwater leaching, sedimentation, early diagenesis, and alteration by deep fluids. According to the origin and lateral distribution of reservoir beds, the hydrocarbon accumulation zones in the Tazhong area were identified as: karsted reservoirs, reef/bank reservoirs, dolomite interior reservoirs, and hydrothermal reservoirs. Such carbonate hydrocarbon accumulation zones are distributed mainly in specific areas of the Tazhong uplift, respectively. Because of differences in the mechanism of reservoir formation, the reservoir space, capability, type and distribution of reservoirs are often different in different carbonate hydrocarbon accumulation zones.

Paleozoic Carbonate Hydrocarbon Accumulation Zones in Tahong Uplift Tarim Basin, Western China

2011 ◽  
Vol 403-408 ◽  
pp. 1511-1516
Author(s):  
Mei Tao Chen ◽  
Ning Yang ◽  
Shang Ming Yang
Keyword(s):  
Tarim Basin ◽  
Early Diagenesis ◽  
Western China ◽  
Hydrocarbon Accumulation ◽  
Different Types ◽  
Fluid Alteration ◽  
Tazhong Area ◽  
Deep Fluid ◽  
Buried Hill ◽  
Tazhong Uplift

Analyzing the discovered carbonate reservoirs in the Tazhong area, Tarim Basin indicates that the development of a reservoir is controlled by subarial weathering and freshwater leaching processes, sedimentation, early diagenesis, and alteration by deep fluids. According to the origin and lateral distribution of reservoirs, the hydrocarbon accumulation zones in the Tazhong area are classified into four types: buried hill and palaeoweathering crust, organic buildup reef-bank, dolomite interior, and deep fluid alteration. Different types of carbonate hydrocarbon accumulation zones are distributed mainly in specific areas of the Tazhong uplift. Because of the different mechanisms of forming reservoirs in different carbonate hydrocarbon accumulation zones, the reservoir space, reservoir capability, type of reservoir and distribution of reservoirs are often different.

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