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Mode of Jurassic Hydocarbon Reservoir Formation and Rules of Reservoir Accumulation in Qaidam Basin(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2007年第02期
Page:
166-169,182
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Mode of Jurassic Hydocarbon Reservoir Formation and Rules of Reservoir Accumulation in Qaidam Basin
Author(s):
XIE Zong-kui1; LI Sheng-de2; CHE Ming3; MA Si-hui2; LI Zhi-yong1
1. School of Energy Resources, China University of Geosciences, Beijing 100083, China; 2. Supervision Center, Qinghai Oilfield Company, Dunhuang 736202, Gansu, China; 3. Fourth Oil Production Factory, Changqing Oilfield Company, PetroChina, Jingbian 718500, Shaanxi, China
Keywords:
gradational;  mode;  hydrocarbon reservoir;  Jurassic System;  Qaidam Basin
PACS:
P618.130.1
DOI:
-
Abstract:
It is very difficult to decide the most vantage points for drilling Jurassic petroleum in Qiadam Basin. From the viewpoint of collocating the source and traps in space and time, this paper sets up three modes of pool formation, thatis, early accumulation-early hydocarbon reservoir formation, early accumulation-late hydocarbon reservoir formation, and late accumulation-late hydocarbon reservoir formation.The characteristics of oil and gas origin, infusing time, and refor- ming or destroying determine the arrangement of oil and gas reservoirs in a particular order. The order may be described as follows: natural gas accumulates in the faultage-anticline zone,oil congregates in piedmont and latency,oil and gas co- exist in the top and slopes of uplift. Furthermore, the grade of the enrichment in this order gradually increases. Accord- ing to the regularity, the enrichment corners can be predicted, among which the eastern slope of Lenghu-4, the slope of Wunan-Bayi uplift, the slope of Huaitoutala-North Delingha and Latency-1 are the unexceptionable drilling targets.

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