轮南低凸起气洗作用响应及定量评价

吴楠; 蔡忠贤; 杨海军; 陈建渝; 刘显凤; 顾乔元

Volume 34 Issue 3

May 2009

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Article Navigation > Earth Science > 2009 > 34(3): 486-492

WU Nan, CAI Zhong-xian, YANG Hai-jun, CHEN Jian-yu, LIU Xian-feng, GU Qiao-yuan, 2009. Quantitative Evaluation and the Geochemical Responses of Gas Washing in Lunnan Petroleum Province. Earth Science, 34(3): 486-492.

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Quantitative Evaluation and the Geochemical Responses of Gas Washing in Lunnan Petroleum Province

WU Nan^{1, 2
,},
CAI Zhong-xian^{1, 2},
YANG Hai-jun³,
CHEN Jian-yu^{1, 2},
LIU Xian-feng^{1, 2},
GU Qiao-yuan³

1.
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China
2.
Key Laboratory of Theory and Technology of Petroleum Exploration and Development, Wuhan 430074, China
3.
Research Institute of Exploration and Development, PetroChina Tarim Corporation, Korla 841000, China

Received Date: 2008-12-23
Publish Date: 2009-05-25

Abstract

Abstract

Lunnan hydrocarbon province has recently experienced intensive gas invasion since the Himalayan movement, and some of the oils in the Ordovician reservoir show characteristics of progressive fractionation by gas moving.Based on the framework of the components phase equilibrium, the process of gas washing can deplete the n-alkanes of the oil and produce the subsequent condensates.Geochemistry analysis shows that both the residual oil and the condensates indicate the phase fractionation characteristics on their light ends (C₆-C₈). Moreover, gas chromatogram data show that the altered oils are depleted of light n-alkanes. Through calculating the mass depletion of oil in n-alkanes relative to an unfractionated oil (Q), it determines that oils in the Ordovician reservoir experienced great alternation of gas washing, and the Q value decreases westward.However, oils in the Carboniferous and Triassic reservoir show no depletion of the n-alkanes.
- gas washing,
- relative depletion of n-alkanes,
- Lunnan low uplift,
- evaporative fractionation,
- quantification

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References(22)

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