Continental hydrocarbon migration and accumulation with palaeo-fluid potential field in the south slope of Kuqa Depression, Tarim Basin

被引：0
作者：
Chen J. [1 ]
Liu Y. [2 ]
Li C. [1 ]
Yang X. [2 ]
Yang L. [1 ]
Shi Y. [3 ]
机构：
[1] Northwest Branch, Research Institute of Petroleum Exploration & Development, PetroChina, Lanzhou, 730020, Gansu
[2] Research Institute of Exploration & Development, Tarim Oilfield Company, PetroChina, Korla, 841000, Xinjiang
[3] CNPC Logging (CPL), Xi'an, 710067, Shaanxi
来源：
Chen, Jun (chenjun_xds@petrochina.com.cn) | 1600年 / Science Press卷 / 52期
关键词：
Crucial period for pool-forming; Fluid potential; Kuqa Depression; Migration pathway; Paleo-buried depth; Paleo-pressure;
D O I：
10.13810/j.cnki.issn.1000-7210.2017.04.022
中图分类号：
学科分类号：
摘要：
Paleogene and Cretaceous clastic hydrocarbon reservoirs in the south slope of Kuqa Depression, Tarim Basin belong to distal reservoirs, where oil and gas are migrated from continental Jurassic and Triassic source rocks in the north of Kuqa Depression. This kind of reservoirs is dominated by structural traps with low closure and small area, and structural reservoir evaluation in the later stage is a real challenge. Therefore, based on the migration-accumulation theory of distal reservoirs we conduct a research on the reservoirs. First differential oil and gas migration pathways of the two source rocks are confirmed. Then with the reference of the geological characteristics of the area, the palaeo-buried depth is restored by the impression method and the sequence ratio method, the palaeo-pressure is rebuilt by Philippone's formula. Finally the palaeo-fluid potential of the crucial period for pool-forming (Jurassic and Triassic) is gained by the Hubbert theory. The following observation are obtained: ①Hydrocarbon from Triassic lucastrine source rock was migrated along the Bottom Cretaceous unconformity and Late-Yanshanian faults during the deposition of Neogene Kangcun Formation, while hydrocarbon from Jurassic coal-measure source rocks was migrated along the Bottom Paleogene unconformity and Late-Yanshanian faults during the deposition of Kuqa Formation; ②The palaeo-fluid potential of the crucial period for pool-forming (Jurassic and Triassic) were all high in the north and low in the south, corresponding to the downward trend of fluid potential because oil and gas was migrated from the hydrocarbon generating center (Kuqa Depression) in the north to the south slope, also in accordance with the distribution of source rock in the Kuqa Depression; ③Yudong-Yingmaili, Hongqi-Yaha were the superiority areas for Jurassic oil and gas migration and accumulation during the deposition of Kuqa Formation, while Quele, Yingmaili and Yaha were the superiority areas for Triassic oil and gas migration and accumulation during the deposition of Kangcun Formation, scale lithologic traps can be found in the mentioned superiority pathway of oil and gas migration. The high accuracy above-achievements are proven by geochemical indicators and source rock thickness, which can be used to predict favorable oil and gas migration pathways and direction in the south slope of Kuqa Depression. © 2017, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved.
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页码：841 / 850
页数：9
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