新疆风城Z32稠油油藏注气辅助蒸汽驱实验研究及矿场应用

doi:10.13809/j.cnki.cn32-1825/te.2021.02.015

油气藏评价与开发 ›› 2021, Vol. 11 ›› Issue (2): 241-247.doi: 10.13809/j.cnki.cn32-1825/te.2021.02.015

新疆风城Z32稠油油藏注气辅助蒸汽驱实验研究及矿场应用

桑林翔¹(),吕柏林¹,卢迎波¹,王俊衡²(),王健²,黄克川²,马鹏¹,邢向荣¹

1.中国石油新疆油田分公司风城油田作业区,新疆克拉玛依 834000
2.西南石油大学油气藏地质及开发工程国家重点实验室,四川成都 610500

收稿日期:2019-10-24 出版日期:2021-04-26 发布日期:2021-04-30
通讯作者: 王俊衡 E-mail:slx_zy@petrochina.com.cn;1187395805@qq.com
作者简介:桑林翔（1973 —),男,硕士,高级工程师,主要从事油田开发研究工作。地址：新疆克拉玛依市克拉玛依区宝石路278号风城油田作业区,邮政编码：834000。E-mail: slx_zy@petrochina.com.cn
基金资助:
国家自然科学基金“重力超覆下气体连续"剥蚀"稠油边界层的驱油机制研究”(51574200);国家科技重大专项“CO₂泡沫体系控制气窜关键技术研究”(2016ZX05016-001-003)

Experiment on steam flooding assisted by gas injection in Z32 heavy oil reservoir in Fengcheng of Xinjiang and its application

SANG Linxiang¹(),LYU Bailin¹,LU Yingbo¹,WANG Junheng²(),WANG Jian²,HUANG Kechuan²,MA Peng¹,XING Xiangrong¹

1. PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China
2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China

Received:2019-10-24 Online:2021-04-26 Published:2021-04-30
Contact: WANG Junheng E-mail:slx_zy@petrochina.com.cn;1187395805@qq.com

摘要/Abstract

摘要：

稠油油藏注蒸汽开发后期,汽窜严重,开发效果逐年变差,急需探讨改善蒸汽驱效果的相关技术,针对新疆油田风城Z32齐古组油藏稠油特点,研究了注CO₂辅助蒸汽驱改善开发效果的可行性。在稠油油藏注蒸汽开采过程中,注入CO₂、N₂或烟道气,可以使原油体积膨胀,增加地层弹性能量,降低原油黏度,改善原油的流动能力。利用高温高压原油配样器和岩心流动实验装置,测定了不同类型注入气对稠油的膨胀、降黏效果：注入CO₂、N₂和模拟烟道气分别可使原油体积膨胀约10 %~40 %、2 %~10 %、4 %~16 %,黏度降低27.3 %~82.9 %、4.3 %~18.5 %、10.2 %~45.8 %,CO₂、N₂和模拟烟道气分别能够提高采收率5.83 %、3.08 %、3.75 %,因此,推荐选用CO₂作为注入介质。现场应用实践表明,CO₂辅助蒸汽驱措施后,井组日产油由26.6 t上升至36.2 t,油汽比由0.174上升至0.206,增油1 158 t,取得了显著的经济效益,为该技术的规模应用提供了参考依据。

关键词: 稠油, CO₂, 辅助蒸汽驱, 室内实验, 现场应用

Abstract:

In the later stage of heavy oil reservoir development by steam injection, the steam channeling is serious and the development effect gets worse year by year. So it is urgent to apply relevant technologies to improve steam flooding performance. According to the characteristics of the heavy oil reservoir in Z32 Qigu Formation in Fengcheng Oilfield, the feasibility of steam flooding assisted by CO₂ injection to improve the development effect has been studied. In the process of steam injection in heavy oil reservoir, the injection of CO₂, N₂ or flue gas can make crude oil swell, increase formation elastic energy, reduce viscosity of crude oil and improve oil flow capacity of crude. The swell and viscosity reduction effects of different types of injected gas on heavy oil have been measured by high temperature and high pressure crude oil sampler and core flow experiment device. The volume expansion of crude oil is about 10 % ~ 40 %, 2 % ~ 10 % and 4 % ~ 16 % by injecting CO₂, N₂ and simulated flue gas respectively, the viscosity is reduced by 27.3 % ~ 82.9 %, 4.3 % ~ 18.5 % and 10.2 % ~ 45.8 %, respectively, and the oil recovery is enhanced by 5.83 %, 3.08 % and 3.75 %, respectively. Therefore, CO₂ is recommended as the injection medium. Field application shows that after the new technology is implemented, the daily oil production of the well group increases from 26.6 t to 36.2 t, the oil steam ratio increases from 0.174 to 0.206, and the total oil production increases by 1 158 t. Remarkable economic benefits are obtained, which provides references for the scale application of this new technology.

Key words: heavy oil, CO₂, auxiliary steam drive, laboratory experiment, on-site application

中图分类号:

TE345

桑林翔,吕柏林,卢迎波,王俊衡,王健,黄克川,马鹏,邢向荣. 新疆风城Z32稠油油藏注气辅助蒸汽驱实验研究及矿场应用[J]. 油气藏评价与开发, 2021, 11(2): 241-247.

SANG Linxiang,LYU Bailin,LU Yingbo,WANG Junheng,WANG Jian,HUANG Kechuan,MA Peng,XING Xiangrong. Experiment on steam flooding assisted by gas injection in Z32 heavy oil reservoir in Fengcheng of Xinjiang and its application[J]. Reservoir Evaluation and Development, 2021, 11(2): 241-247.

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岩心编号	注入介质类型	岩心渗透率（10^-3μm²）	含油饱和度（%）	蒸汽驱采收率（%）	较蒸汽驱提高采收率（%）
1#	N₂	2 874.3	68.7	30.36	3.08
2#	CO₂	2 966.4	70.9	29.84	5.83
3#	烟道气	3 018.7	70.3	31.27	3.75

岩心编号	注入方式	岩心渗透率（10^-3μm²）	含油饱和度（%）	蒸汽驱采收率（%）	较蒸汽驱提高采收率（%）
4#	CO₂与蒸汽交替注	2 852.7	69.2	29.61	6.11
5#	CO₂与蒸汽混注	3 005.2	68.7	28.59	3.27

岩心编号	注入介质类型	渗透率（10^-3μm²）	含油饱和度（%）	采出程度（%）	最终采收率（%）
6#	CO₂	2 877.5	67.4	4.8	42.73
7#		2 914.7	68.7	10.3	41.85
8#		3 003.1	70.2	14.9	38.62
9#		3 114.2	71.9	19.2	33.47

注入井数（口）	生产井数（口）	注CO₂前					注CO₂后				有效天数（d）	增油（t）
注入井数（口）	生产井数（口）	日产液（t）	日产油（t）	含水（%）	油汽比		日产液（t）	日产油（t）	含水（%）	油汽比	有效天数（d）	增油（t）
3	10	217.6	26.6	87.7	0.174		268.8	36.2	85.7	0.206	69	1 158

新疆风城Z32稠油油藏注气辅助蒸汽驱实验研究及矿场应用

Experiment on steam flooding assisted by gas injection in Z32 heavy oil reservoir in Fengcheng of Xinjiang and its application

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