Characteristics of Produced Fluid From Condensate Gas Reservoirs With Oil Rings Developed by Gas-Injection Huff and Puff

doi:10.7657/XJPG20220107

Abstract

Abstract:

Gas-injection huff and puff development can improve the recovery of condensate gas reservoirs. Experiments on gas-injection huff and puff in condensate gas reservoirs generally focus on the changes in gas injection volume, gas injection rate and recovery rate, but less on the changes in the composition of the produced fluid. After establishing an indoor physical simulation method for evaluating condensate gas reservoirs with oil rings developed by gas-injection huff and puff, a gas-injection huff and puff experiment was carried out on a condensate gas reservoir with an oil ring after depletion development. The results show that, as the rounds of gas-injection huff and puff increase in the condensate gas reservoir, the content of N₂+C₁decreases while the contents of C₂-C₄ and C₅₊ increase in the produced fluid, and the composition of the produced fluid changes less and less, until to almost stable after the fourth round of gas-injection huff and puff; during the gas-injection huff and puff development for the oil from the oil ring, there are more N₂+C₁ but less C₂-C₆ and C₇₊ in the produced fluid, and as the rounds of gas-injection huff and puff increase, N₂+C₁ increase obviously while C₂-C₆ and C₇₊ decrease significantly during the first several rounds, finally the composition becomes stable after 9 rounds.

Key words: condensate gas reservoir, gas-injection huff and puff, oil ring, depletion development, recovery rate, produced fluid, composition change

CLC Number:

TE372

WANG Bin, DU Jianfen, LIU Qi, ZHANG Yi, LI Daoqing, WANG Quan. Characteristics of Produced Fluid From Condensate Gas Reservoirs With Oil Rings Developed by Gas-Injection Huff and Puff[J]. Xinjiang Petroleum Geology, 2022, 43(1): 48-51.

Figures/Tables 3

References 17

[1]	施英, 刘建仪, 李光明, 等. 高含硫气藏H₂S含量对凝析气相态的影响[J]. 新疆石油地质, 2019, 40(4):456-459.
	SHI Ying, LIU Jianyi, LI Guangming, et al. Influences of H₂S content on condensate gas phases in high sulfur gas reservoirs[J]. Xinjiang Petroleum Geology, 2019, 40(4):456-459.
[2]	HAO Hongda, HOU Jirui, ZHAO Fenglan, et al. Laboratory investigation of cyclic gas injection using CO₂/N₂ mixture to enhance heavy oil recovery in a pressure-depleted reservoir[J]. Arabian Journal of Geosciences, 2020, 13:1-12. doi: 10.1007/s12517-019-5007-7
[3]	谢军, 李骞, 涂汉敏, 等. 高含水致密凝析气藏特殊相态变化[J]. 石油学报, 2020, 41(9):1 109-1 116.
	XIE Jun, LI Qian, TU Hanmin, et al. Special phase behavior of high water-containing tight condensate gas reservoir[J]. Acta Petrolei Sinica, 2020, 41(9):1 109-1 116.
[4]	张国龙, 何志强, 朱建钧, 等. 凝析气藏衰竭式开发影响因素实验[J]. 大庆石油地质与开发, 2016, 35(1):62-65.
	ZHANG Guolong, HE Zhiqiang, ZHU Jianjun, et al. Experiment on the influencing factors of the natural depletion development for condensate gas reservoirs[J]. Petroleum Geology and Oilfield Development in Daqing, 2016, 35(1):62-65.
[5]	汤勇, 龙科吉, 王皆明, 等. 凝析气藏型储气库多周期注采过程中流体相态变化特征[J]. 石油勘探与开发, 2021, 48(2):337-346.
	TANG Yong, LONG Keji, WANG Jieming, et al. Change of phase state during multi-cycle injection and production process of condensate gas reservoir based underground gas storage[J]. Petroleum Exploration and Development, 2021, 48(2):337-346.
[6]	焦玉卫, 谢伟, 邸宝智, 等. 凝析气藏循环注气过程流体相态特征[J]. 新疆石油地质, 2012, 33(6):704-707.
	JIAO Yuwei, XIE Wei, DI Baozhi, et al. Gas condensate phase behavior in process of cyclic gas injection[J]. Xinjiang Petroleum Geology, 2012, 33(6):704-707.
[7]	王启祥, 梁宝兴, 刘欢, 等. 呼探1井清水河组气藏流体相态特征及气藏类型[J]. 新疆石油地质, 2021, 42(6):709-713.
	WANG Qixiang, LIANG Baoxing, LIU Huan, et al. Fluid phases and gas reservoirs of Qingshuihe formation in Well Hutan-1[J]. Xinjiang Petroleum Geology, 2021, 42(6):709-713.
[8]	王皆明, 郭平, 姜凤光. 含水层储气库气驱多相渗流机理物理模拟研究[J]. 天然气地球科学, 2006, 17(4):597-600.
	WANG Jieming, GUO Ping, JIANG Fengguang. The physical simulation study on the gas-drive multiphase flow mechanism of aquifer gas storage[J]. Natural Gas Geoscience, 2006, 17(4):597-600.
[9]	王皆明, 王丽娟, 耿晶. 含水层储气库建库注气驱动机理数值模拟研究[J]. 天然气地球科学, 2005, 16(5):673-676.
	WANG Jieming, WANG Lijuan, GENG Jing, et al. The numerical simulation study on the gas-drive mechanism of aquifer gas storages[J]. Natural Gas Geoscience, 2005, 16(5):673-676.
[10]	何学良, 黄世军, 孙常伟, 等. 水淹枯竭气藏型储气库多周期注采气水相渗变化规律[J]. 油气储运, 2015, 34(2):150-153.
	HE Xueliang, HUANG Shijun, SUN Changwei, et al. Gas-water relative permeability variation in multi-cycle injection production of underground gas storage in flooded depleted gas reservoir[J]. Oil & Gas Storage and Transportation, 2015, 34(2):150-153.
[11]	石磊, 廖广志, 熊伟, 等. 水驱砂岩气藏型地下储气库气水二相渗流机理[J]. 天然气工业, 2012, 32(9):85-87.
	SHI Lei, LIAO Guangzhi, XIONG Wei, et al. Gas-water percolation mechanism in an underground storage built on a water-drive sandstone gas reservoir[J]. Natural Gas Industry, 2012, 32(9):85-87.
[12]	石磊, 王皆明, 朱华银, 等. 水侵气藏型储气库气水微观渗流规律[J]. 天然气勘探与开发, 2020, 43(1):58-63.
	SHI Lei, WANG Jieming, ZHU Huayin, et al. Microscopic percolation laws of gas and water in underground gas storages rebuilt from water-invasion gas reservoirs[J]. Natural Gas Exploration and Development, 2020, 43(1):58-63.
[13]	孙军昌, 胥洪成, 王皆明, 等. 气藏型地下储气库建库注采机理与评价关键技术[J]. 天然气工业, 2018, 38(4):138-144.
	SUN Junchang, XU Hongcheng, WANG Jieming, et al. Injection-production mechanisms and key evaluation technologies for underground gas storages rebuilt from gas reservoirs[J]. Natural Gas Industry, 2018, 38(4):138-144.
[14]	唐恩高, 李相方, 李敬松, 等. 裂缝性凝析气藏循环注气数学模型研究及应用[J]. 天然气工业, 2005, 25(2):119-120.
	TANG Engao, LI Xiangfang, LI Jingsong, et al. Research and application of mathematical model for fractured condensate reservoirs to inject gas cyclically[J]. Natural Gas Industry, 2005, 25(2):119-120.
[15]	黄小亮, 贾新峰, 周翔, 等. 延长油田低渗油藏长岩心二氧化碳吞吐参数优化[J]. 新疆石油地质, 2015, 36(3):313-316.
	HUANG Xiaoliang, JIA Xinfeng, ZHOU Xiang, et al. Optimization of long core CO₂ huff-n-puff experimental parameters in low permeability reservoir,Yanchang oilfield[J]. Xinjiang Petroleum Geology, 2015, 36(3):313-316.
[16]	李浩, 孙雷, 汤勇, 等. 小断块油藏天然气单井吞吐采收率实验研究[J]. 重庆科技学院学报(自然科学版), 2010, 12(4):63-66.
	LI Hao, SUN Lei, TANG Yong, et al. Experiment study on enhanced oil recovery by gas single well huff-pull in small fault block reservoirs[J]. Journal of Chongqing University of Science and Technology(Natural Sciences Edition), 2010, 12(4):63-66.
[17]	钱坤, 杨胜来, 窦洪恩, 等. 特低渗油藏不同CO₂注入方式微观驱油特征[J]. 新疆石油地质, 2020, 41(2):204-208.
	QIAN Kun, YANG Shenglai, DOU Hongen, et al. Microscopic characteristics of oil displacement with different CO₂ injection modes in extra-low permeability reservoirs[J]. Xinjiang Petroleum Geology, 2020, 41(2):204-208.