Production Behaviors of Condensate Oil From Gas Reservoirs in Southestern Sulige Gas Field, Ordos Basin

doi:10.7657/XJPG20220108

Abstract

Abstract:

The Permian gas reservoirs in the southeastern area of Sulige gas field in the Ordos basin are wet gas reservoirs developed from coal-measure source rocks. No condensate oil is produced just from the reservoir during development. However, when natural gas enters the wellbore and experiences the decreases in both temperature and pressure to below the critical values, condensate oil would appear. In order to increase the production of condensate oil associated with natural gas, the full-component analysis results of natural gas sampling and production data are used to analyze the geological conditions for reservoir forming and the factors such as temperature, pressure and gas production in the process of development. It’s found that the condensate oil production is influenced by the stable balance separation time and the liquid carrying capacity. After analyzing the geological and production conditions, controlling factors on the production of condensate oil are compared, and according to the changes of gas production, the production of condensate oil can be predicted block by block. The result provides basis for updating the gas reservoir development plan in the study area.

Key words: Ordos basin, Sulige gas field, southeastern area, Permian, wet gas reservoir, condensate oil, production behavior, production

CLC Number:

TE372

GUAN Wei, LIU Chiyang, LI Han, WEN Yuanchao, YANG Qingsong, WANG Tao. Production Behaviors of Condensate Oil From Gas Reservoirs in Southestern Sulige Gas Field, Ordos Basin[J]. Xinjiang Petroleum Geology, 2022, 43(1): 52-58.

Figures/Tables 11

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Table 1

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Table 2

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集气站	最佳产气窗口/10⁴ m³	优化前产油量误差/%	优化后产油量误差/%
集气站	最佳产气窗口/10⁴ m³	优化前产油量误差/%	分区块整体	分区块分月	分区块分季度
SD39	900~1 300	20.94	10.08	2.91	3.03
SD40	800~1 200		3.66	0.82	0.41
SD41	3 300~3 800		18.30	13.28	14.97
W9	2 200~2 800		14.76	3.10	3.21