A Stratified Gas Injection Technique with Concentric Double Pipe for CO2 Flooding in Subei Oilfield
-
摘要:
为了解决苏北油田CO2驱油常规笼统注气工艺在实际应用中存在的吸气剖面不均匀、高渗层气窜严重和低渗层动用程度低等问题，在分析常规分层注气工艺特点的基础上，通过设计双级锚定式管柱、优选防腐蚀材质和质量流量计、改进分注器等井下工具，形成了CO2驱油同心双管分层注气技术。根据现场实际情况，研究解决了管柱失稳、封隔器失效等问题，实现了准确分层注气。该技术在草舍油田C1井进行了现场试验，利用地面装置调节分层注入量，各项指标均满足分层配注要求，取得了良好的现场应用效果。试验结果表明，该技术具有操作简单、可靠性高和调配精度高等优点，可有效实现精细注气，为苏北油田CO2驱油有效开发提供了新的技术手段。
Abstract:Conventional gas injection techniques of CO2 flooding in Subei Oilfield face uneven suction profiles, serious gas channeling in high permeability layers, and low production degrees in low permeability layers in the techniques’ application. In order to address these issues, we analyzed conventional stratified gas injection techniques and developed a stratified gas injection technique with concentric double pipe for CO2 flooding. It contains a two-stage anchored pipe string design, anti-corrosion materials and a mass flowmeter selection, with optimization of a gas injection separator and other downhole tools. According to the actual situation of field, the instability of the pipe string and the failure of the packer were solved, and an accurate stratified gas injection was accomplished. The technique has been tested in Well C1 of Caoshe Oilfield, and all indexes met the design requirements of stratified gas injection by adjusting the stratified gas injection volume with ground devices. The good test results showed that the technique has the advantages of convenient operation, high reliability, and high dispensing accuracy. Therefore, it can bring about fine gas injection and provide a new technical method for effective development of CO2 flooding in Subei Oilfield.
-
-
![]()
图 1 同心双管分层注气管柱结构示意
Figure 1. stratified gas injection pipe string structure withco-ncentric double pipe
![]()
图 2 Y445型注气封隔器的结构
1. 上接头; 2. 剪钉; 3. 丢手剪环; 4. 打捞筒; 5. 内中心管; 6. 胶筒总成; 7. 外中心管; 8. 卡瓦; 9. 活塞套; 10. 坐封活塞; 11. 锁块; 12. 下接头
Figure 2. Structure of Y445 gas injection packer
![]()
图 3 Y441型注气封隔器的结构
1. 上接头; 2. 剪钉; 3. 内中心管; 4. 胶筒总成; 5. 上锁环; 6. 外中心管; 7. 上活塞; 8. 卡瓦; 9. 下活塞; 10. 下锁环; 11. 锁块; 12. 下接头
Figure 3. Structure of Y441 gas injection packer
表 1 质量流量计精度检测试验结果
Table 1 Accuracy test results of mass flowmeter
流量/（t∙d−1） 标准质量/kg 测量质量/kg 误差，% 5.27 15.4 15.33 −0.45 18.13 16.3 16.25 −0.31 25.38 23.0 22.97 −0.13 
下载: 导出CSV
-
[1] 王敏生,姚云飞. 碳中和约束下油气行业发展形势及应对策略[J]. 石油钻探技术,2021,49(5):1–6. doi: 10.11911/syztjs.2021070 WANG Minsheng, YAO Yunfei. Development situation and countermeasures of the oil and gas industry facing the challenge of carbon neutrality[J]. Petroleum Drilling Techniques, 2021, 49(5): 1–6. doi: 10.11911/syztjs.2021070
[2] 胡永乐,郝明强. CCUS产业发展特点及成本界限研究[J]. 油气藏评价与开发,2020,10(3):15–22. HU Yongle, HAO Mingqiang. Development characteristics and cost analysis of CCUS in China[J]. Reservoir Evaluation and Development, 2020, 10(3): 15–22.
[3] 唐人选,梁珀,吴公益,等. 苏北复杂断块油藏二氧化碳驱油效果影响因素分析及认识[J]. 石油钻探技术,2020,48(1):98–103. doi: 10.11911/syztjs.2019125 TANG Renxuan, LIANG Po, WU Gongyi, et al. Analyzing and understanding the influencing factors of CO2 flooding in the Subei complex fault block reservoirs[J]. Petroleum Drilling Techniques, 2020, 48(1): 98–103. doi: 10.11911/syztjs.2019125
[4] 秦积舜,韩海水,刘晓蕾. 美国CO2驱油技术应用及启示[J]. 石油勘探与开发,2015,42(2):209–216. doi: 10.11698/PED.2015.02.10 QIN Jishun, HAN Haishui, LIU Xiaolei. Application and enlightenment of carbon dioxide flooding in the United States of America[J]. Petroleum Exploration and Development, 2015, 42(2): 209–216. doi: 10.11698/PED.2015.02.10
[5] 陈祖华,孙雷,杨正茂,等. 草舍泰州组油藏CO2混相驱效果及二次气驱可行性研究[J]. 油气藏评价与开发,2019,9(3):47–50. doi: 10.3969/j.issn.2095-1426.2019.03.009 CHEN Zuhua, SUN Lei, YANG Zhengmao, et al. Effects of CO2 miscible displacement and feasibility study of secondary gas flooding of Taizhou Formation in Caoshe Oilfield[J]. Reservoir Evaluation and Development, 2019, 9(3): 47–50. doi: 10.3969/j.issn.2095-1426.2019.03.009
[6] 陈祖华,孙雷,杨正茂,等. 苏北低渗透油藏CO2驱油开发模式探讨[J]. 西南石油大学学报(自然科学版),2020,42(3):97–106. CHEN Zuhua, SUN Lei, YANG Zhengmao, et al. Discussion on the development model of CO2 flooding in low permeability reservoir in North Jiangsu[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2020, 42(3): 97–106.
[7] 王海妹. CO2驱油技术适应性分析及在不同类型油藏的应用:以华东油气分公司为例[J]. 石油地质与工程,2018,32(5):63–65. doi: 10.3969/j.issn.1673-8217.2018.05.016 WANG Haimei. Adaptive analysis of CO2 flooding technology and its application in different types of reservoirs[J]. Petroleum Geology and Engineering, 2018, 32(5): 63–65. doi: 10.3969/j.issn.1673-8217.2018.05.016
[8] 张绍辉,王凯,王玲,等. CO2驱注采工艺的应用与发展[J]. 石油钻采工艺,2016,38(6):869–875. ZHANG Shaohui, WANG Kai, WANG Ling, et al. Development and application of CO2 flooding[J]. Oil Drilling & Production Technology, 2016, 38(6): 869–875.
[9] 俞凯, 刘伟, 陈祖华, 等. 陆相低渗透油藏CO2混相驱技术[M]. 北京: 中国石化出版社, 2016: 7-146. YU Kai, LIU Wei, CHEN Zuhua, et al. CO2 miscible flooding technology in continental low permeability reservoir[M]. Beijing: China Petrochemical Press, 2016: 7-146.
[10] 贺三,向粟林,夏兴宇,等. CO2驱油下非金属管材耐蚀性能初步评价[J]. 油气藏评价与开发,2020,10(3):86–91. HE San, XIANG Sulin, XIA Xingyu, et al. Preliminary evaluation for corrosion resistance of non-metallic pipes by CO2 flooding[J]. Reservoir Evaluation and Development, 2020, 10(3): 86–91.
[11] 孙银娟,王潜忠,张志浩,等. 316L不锈钢在模拟含二氧化碳原油中的耐腐蚀性能[J]. 油气储运,2020,39(1):86–91. SUN Yinjuan, WANG Qianzhong, ZHANG Zhihao, et al. Corrosion resistance of 316L stainless steel in simulated CO2-bearing crude oil[J]. Oil & Gas Storage and Transportation, 2020, 39(1): 86–91.
[12] 周伟强,李旭光,熊培祺. 渤海油田常用套管CO2腐蚀室内研究[J]. 石油地质与工程,2017,31(3):124–126. doi: 10.3969/j.issn.1673-8217.2017.03.033 ZHOU Weiqiang, LI Xuguang, XIONG Peiqi. Laboratory CO2 corrosion study of common casing in Bohai Oilfield[J]. Petroleum Geology and Engineering, 2017, 31(3): 124–126. doi: 10.3969/j.issn.1673-8217.2017.03.033
[13] 刘博,任呈强,贺三,等. 20钢和L245NS钢在CO2驱油反排水中的腐蚀行为[J]. 腐蚀与防护,2018,39(6):418–424. doi: 10.11973/fsyfh-201806002 LIU Bo, REN Chengqiang, HE San, et al. Corrosion behavior of carbon steels 20 and L245NS in drainage of CO2 enhanced oil recovery[J]. Corrosion and Protection, 2018, 39(6): 418–424. doi: 10.11973/fsyfh-201806002
[14] 李阳. 低渗透油藏CO2驱提高采收率技术进展及展望[J]. 油气地质与采收率,2020,27(1):1–10. LI Yang. Technical advancement and prospect for CO2 flooding enhanced oil recovery in low permeability reservoirs[J]. Petroleum Geology and Recovery Efficiency, 2020, 27(1): 1–10.
[15] 姜燕,罗洪林,张旭,等. 管外缆控式智能分注技术[J]. 石油钻采工艺,2021,43(6):803–810. JIANG Yan, LUO Honglin, ZHANG Xu, et al. External cable-controlled intelligent separate-layer water injection technology[J]. Oil Drilling & Production Technology, 2021, 43(6): 803–810.
[16] 李永康,贾贻勇,张广中,等. 胜利油田注水井分层酸化管柱研究现状及发展建议[J]. 石油钻探技术,2021,49(3):129–134. doi: 10.11911/syztjs.2021030 LI Yongkang, JIA Yiyong, ZHANG Guangzhong, et al. Research progress and development suggestion of stratified acidizing strings in water injection wells of Shengli Oilfield[J]. Petroleum Drilling Techniques, 2021, 49(3): 129–134. doi: 10.11911/syztjs.2021030
[17] 赵广渊,季公明,杨树坤,等. 液控智能分注工艺调配及分层注水量计算方法[J]. 断块油气田,2021,28(2):258–261. ZHAO Guangyuan, JI Gongming, YANG Shukun, et al. Allocation method and calculation of layered injection rate of liquid control intelligent layered water injection process[J]. Fault-Block Oil & Gas Field, 2021, 28(2): 258–261.
[18] 王世杰. 二次压缩Y445型封隔器的研制[J]. 石油机械,2014,42(11):163–165. doi: 10.3969/j.issn.1001-4578.2014.11.038 WANG Shijie. Design of secondary compressive Y445 packer[J]. China Petroleum Machinery, 2014, 42(11): 163–165. doi: 10.3969/j.issn.1001-4578.2014.11.038
[19] 王世杰. 双向三力加载注气封隔器的研制[J]. 石油机械,2016,44(12):90–92. WANG Shijie. Two-way three-force loading packer for gas injection[J]. China Petroleum Machinery, 2016, 44(12): 90–92.
[20] 贾庆升. 无线智能分层注采技术研究[J]. 石油机械,2019,47(7):99–104. JIA Qingsheng. Intelligent separate layer injection and production technology based on wireless telemetry[J]. China Petroleum Machinery, 2019, 47(7): 99–104.
[21] 于九政,王子建,罗必林,等. 深井多级分注工艺管柱研制及应用[J]. 石油机械,2012,40(10):88–90. YU Jiuzheng, WANG Zijian, LUO Bilin, et al. Development and application of multistage separate injection technological string for deep well[J]. China Petroleum Machinery, 2012, 40(10): 88–90.
计量
- 文章访问数: 291
- HTML全文浏览量: 107
- PDF下载量: 45
