浅薄层普通稠油油藏聚合物驱提高采收率研究与应用

doi:10.3969/j.issn.1006-6535.2023.01.015

特种油气藏 ›› 2023, Vol. 30 ›› Issue (1): 107-113.DOI: 10.3969/j.issn.1006-6535.2023.01.015

浅薄层普通稠油油藏聚合物驱提高采收率研究与应用

王凤娇^1,2, 徐贺^1,2, 刘义坤^1,2, 王永平³, 吴晨宇^4,5, 李盖宇^1,2

1.东北石油大学,黑龙江大庆 163318;
2.提高油气采收率教育部重点实验室,黑龙江大庆 163318;
3.中海石油(中国)有限公司天津分公司,天津 300459;
4.中国石油大庆油田有限责任公司,黑龙江大庆 163453;
5.黑龙江省油气藏增产增注重点实验室,黑龙江大庆 163453

收稿日期:2022-03-22 修回日期:2022-10-20 出版日期:2023-02-25 发布日期:2023-03-24
作者简介:王凤娇(1988—),女,副教授,2011年毕业于东北石油大学石油工程专业,2017年毕业于该校石油与天然气工程专业,获博士学位,现从事油气渗流机理及提高采收率等方面的研究工作。
基金资助:
国家自然科学基金“压裂-渗流-驱油方法多场耦合渗流机理研究”(52074087)

Study and Application of Polymer Flooding for Enhanced Oil Recovery in Shallow Ordinary Heavy Oil Reservoirs

Wang Fengjiao^1,2, Xu He^1,2, Liu Yikun^1,2, Wang Yongping³, Wu Chenyu^4,5, Li Gaiyu^1,2

1. Northeast Petroleum University, Daqing, Heilongjiang 163318, China;
2. Key Laboratory for Improving Oil and Gas Recovery (Northeast Petroleum University), Ministry of Education, Daqing, Heilongjiang 163318, China;
3. China National Offshore Oil (China) Co., Ltd, Tianjin Company, Tianjin 300459, China;
4. PetroChina Daqing Oilfield Co., Ltd., Daqing, Heilongjiang 163453, China;
5. Heilongjiang Provincial Key Laboratory for Oil and Gas Reservoir Production and Injection Increase, Daqing, Heilongjiang 163453, China

Received:2022-03-22 Revised:2022-10-20 Online:2023-02-25 Published:2023-03-24

摘要/Abstract

摘要： J-XC区块属于高孔高渗普通稠油油藏,油层埋藏浅、厚度薄,由于水驱过程黏滞阻力过大、水驱波及范围小、储层动用程度低、水驱采收率低,需转换开发方式,开展聚合物驱油方法提高采收率研究。在聚合物注入性评价的基础上,采用岩心流动实验和数值模拟方法开展聚合物驱注入参数和注采关系优化,对聚合物注入质量浓度、注入量、注入速度,以及井网井距、注采比等进行优化,从而获得最佳注入参数和注采关系。结果表明:聚合物相对分子质量为2 100×10⁴、注入质量浓度为1 500 mg/L、注入量为0.400倍孔隙体积条件下,可保证聚合物的可注入性和高利用效率;油藏工程参数优化方案为采用五点法井网,合理注采井距为150 m,注入速度为每年注入0.070倍孔隙体积,不同厚度油层根据其最优单井日注入量配注,注采比为1.1~1.2。矿场先导试验表明,目标井组增油降水效果显著,截至2021年6月,累计注入聚合物0.228倍孔隙体积,累计增油量为5.06×10⁴t,提高采收率6.75个百分点,含水率最高下降幅度达15.8个百分点。研究成果对于浅薄层普通稠油油藏聚合物驱参数优化和油藏工程设计具有借鉴意义。

关键词: 普通稠油, 浅薄层, 聚合物驱, 参数优化, 提高采收率

Abstract: Block J-XC is a common heavy oil reservoir with high porosity and permeability, shallow reservoir burial, and thin thickness. Due to high viscous resistance in the water flooding process, small effect range of water flooding, low reservoir productivity and low recovery rate by water flooding, it is necessary to change the development method and employ polymer flooding method to enhance the oil recovery. On the basis of polymer injectivity evaluation, the injection parameters and injection-production relationship of polymer flooding were optimized by core flow test and numerical simulation, including the mass concentration of polymer injection, injection volume, injection rate, well pattern, well spacing, injection-production ratio, so as to obtain the best injection parameters and injection-production relationship. The result shows that the injectivity and high utilization efficiency of the polymer were actualized under the conditions of 2 100×10⁴ relative molecular mass of the polymer, 1 500 mg/L injection mass concentration and 0.400 times of pore volume; the optimal reservoir engineering parameters were a five-spot pattern, a reasonable injection-production well spacing of 150 m, an injection rate of 0.070 times the pore volume per year, and an injection ratio of 1.1 to 1.2 for different thicknesses of oil reservoirs according to their optimal single-well daily injection volumes. The pilot test in the field proves the significant effect of increasing oil and decreasing water cut in the target well cluster. As of June 2021, the cumulative injection rate of polymer is 0.228 times the pore volume, and the cumulative oil increase is 5.06×10⁴t, the recovery factor is enhanced by 6.75 percentage points and the water cut is decreased by 15.8 percentage points. There is much for reference of the results to the optimization of polymer flooding parameters and reservoir engineering design in shallow ordinary heavy oil reservoirs.

Key words: ordinary heavy oil, shallow layer, polymer flooding, parameter optimization, enhanced oil recovery

中图分类号:

TE345

王凤娇, 徐贺, 刘义坤, 王永平, 吴晨宇, 李盖宇. 浅薄层普通稠油油藏聚合物驱提高采收率研究与应用[J]. 特种油气藏, 2023, 30(1): 107-113.

Wang Fengjiao, Xu He, Liu Yikun, Wang Yongping, Wu Chenyu, Li Gaiyu. Study and Application of Polymer Flooding for Enhanced Oil Recovery in Shallow Ordinary Heavy Oil Reservoirs[J]. Special Oil & Gas Reservoirs, 2023, 30(1): 107-113.

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浅薄层普通稠油油藏聚合物驱提高采收率研究与应用

Study and Application of Polymer Flooding for Enhanced Oil Recovery in Shallow Ordinary Heavy Oil Reservoirs

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