鄂尔多斯盆地苏里格气田东南区气藏凝析油产出规律

doi:10.7657/XJPG20220108

摘要/Abstract

摘要：

鄂尔多斯盆地苏里格气田东南区二叠系气藏为煤系烃源岩形成的湿气气藏。开发过程中地层内无凝析油生成,但天然气进入井筒后,随着温度和压力低于临界凝析温度和临界凝析压力,会析出凝析油。为提高天然气开发过程中伴生的凝析油产量,根据天然气全组分分析结果及生产数据,分析成藏地质条件及开发过程中温度、压力、产气量等因素,明确凝析油产出受稳定平衡分离时间及气体携液能力影响。综合地质和生产因素,比较各因素对凝析油产量的影响,并根据产气量变化,分区块和分时段地预测凝析油产量,为研究区气藏开发方案调整提供依据。

关键词: 鄂尔多斯盆地, 苏里格气田, 东南区, 二叠系, 湿气气藏, 凝析油, 产出规律, 产量预测

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

中图分类号:

TE372

官伟, 刘池洋, 李涵, 文远超, 杨青松, 王涛. 鄂尔多斯盆地苏里格气田东南区气藏凝析油产出规律[J]. 新疆石油地质, 2022, 43(1): 52-58.

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.

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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