| Autor: |
Zhang Yong-shu, Wu Kun-yu, Jiang Ying-hai, Wang Peng, Cai Zhi-hong, Gao Fa-run, Tan VVu-lin, Gao Shu-fang, Xian Ben-zhong |
| Předmět: |
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| Zdroj: |
Natural Gas Geoscience; Mar2018, Vol. 29 Issue 3, p7-7, 1p |
| Abstrakt: |
The discovery of deep carbonate hydrocarbon-bearing pool in the western Yingxiongling area is the most important achievement for oil-gas exploration in Qaidam Basin during the past a few years. Several wells with over 1 000 tons of oil equivalent daily output revealed a huge resource capacity in this region. Meanwhile, the complex geological conditions of this region brought a huge challenge for the exploration work. ln order to further understand the geological characteristics and controlling factors of the deep hydrocarbon-bearing pool in the western Yingxiongling area, the new research findings that achieved during the past years were organized and summarized. Their conclusions indicated (1) the E2-3xg2 source rocks in the western Yingxiongling area are characterized by thick thickness (reached 2 000m), high TOC content (0.6 %-2.2%) ,suitable kerogen type ( II1)and maturation (RO = 0.7%-1.5%) , these conditions provided a foundation for huge hydrocarbon generation; (2) controlled by the Himalayan tectonic movements, the strata in the western Yingxiongling area constituted by interbedded soft and hard rock layers deformed in a compressive stress background, formed special structural style of “double-layer structure”; (3) the lithology of the E2-3xg2 reservoir is mixed carbonate rock, pore-fracture coupled reservoir space created the necessary condition for high effective reservoirs, wide developed inter crystalline pore was the foundation for regional hydrocarbon-bearing;(4) deep hydrocarbon-bearing pool in the western Yingxiongling area experienced three accumulation episodes included early episode, middle episode and late episode, the middle episode was the main accumulation episode in the study area. The existence of halite seal layers not only led to wide spread of abnormal pressure in the deep hydrocarbon-bearing pool in the western Yingxiongling area, but also led to the differences of accumulation models between the hydrocarbon deposits occurring inter- and below-halite beds. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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