稠油驱替-流度控制与非均质性调整——缔合聚合物与HPAM对比

doi:10.13809/j.cnki.cn32-1825/te.2020.06.010

油气藏评价与开发 ›› 2020, Vol. 10 ›› Issue (6): 65-71.doi: 10.13809/j.cnki.cn32-1825/te.2020.06.010

稠油驱替-流度控制与非均质性调整——缔合聚合物与HPAM对比

梁严^1,²(),王增林³,史树彬⁴,郭拥军^1,^2,⁵(),胡俊⁵,罗平亚¹,张新民^1,⁵,曹苗⁵,张伟⁵,刘洋⁵

1.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
2.西南石油大学化学化工学院,四川成都 610500
3.中国石化胜利油田分公司,山东东营 257000
4.中国石化胜利油田分公司石油工程技术研究院,山东东营 257000
5.四川光亚聚合物化工有限公司,四川南充 637900

收稿日期:2020-11-02 出版日期:2020-12-26 发布日期:2021-01-07
通讯作者: 郭拥军 E-mail:gyfzly@126.com;gyfzgyj@126.com
作者简介:梁严（1988 —）,男,在读博士研究生,工程师,主要从事化学驱提高采收率技术研究。地址：四川省成都市新都区新都大道8号,邮政编码：610500。E-mail: gyfzly@126.com
基金资助:
国家科技重大专项“海上油田泡沫凝胶调驱技术研究”(2016ZX05025003-011)

Heavy oil displacement-mobility control and heterogeneity adjustment: Associative polymer versus HPAM

LIANG Yan^1,²(),WANG Zenglin³,SHI Shubin⁴,GUO Yongjun^1,^2,⁵(),HU Jun⁵,LUO Pingya¹,ZHANG Xinmin^1,⁵,CAO Miao⁵,ZHANG Wei⁵,LIU Yang⁵

1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
2.College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China
3.Sinopec Shengli Oilfield, Dongying, Shandong 257000, China
4.Research Institute of Petroleum Engineering Technology, Sinopec Shengli Oilfield, Dongying, Shandong 257000, China
5.Sichuan Guangya Polymer Chemical Co., Ltd., Nanchong, Sichuan 637900, China

Received:2020-11-02 Online:2020-12-26 Published:2021-01-07
Contact: GUO Yongjun E-mail:gyfzly@126.com;gyfzgyj@126.com

摘要/Abstract

摘要：

稠油油藏化学驱因原油黏度较高和储层非均质性严重,使得驱替液往往通过优势渗流通道而出现早期突破甚至无效循环,最终导致采收率较低,需要研究在低黏度下能够高效建立阻力能力而实现较好流度控制且能显著调整非均质性的驱油剂及体系。在相近黏度下,以部分水解聚丙烯酰胺（HPAM）为对比,较为系统地研究了缔合聚合物（HAWSP）的阻力系数、均质流度控制能力和非均质性调整能力。相近黏度下,渗透率范围在（300~2 000）×10^-3 μm²,缔合聚合物的阻力系数约为300×10^-3 μm²下HPAM所建立的4倍,且缔合聚合物对110.7 mPa·s原油有明显稳定的驱替前缘和更高的提高采收率值;均质条件下,缔合聚合物与HPAM有类似的产聚表现和存聚率,而在非均质下,前者的存聚率（63.4 %）显著高于后者（5.2 %）;4倍渗透率级差下,缔合聚合物在高低渗层中的分流表现出明显的交替移动且能够使后续水驱在较长时间内保持较高的低渗层分流率;5倍渗透率级差下,缔合聚合物能驱替簇状模型中高低渗区域的大部分残余油,且在外围大流道中可观察到“拉丝”和“油路桥接”现象。结果表明：缔合聚合物有显著的流度控制和非均质调整能力,这也从海上油田缔合聚合物驱现场的应用得到证实,因此,缔合聚合物在稠油油藏的开发中具有较大应用潜力。

关键词: 稠油, 缔合聚合物, HPAM, 流度控制, 非均质性调整

Abstract:

Due to high oil viscosity and severe heterogeneity, heavy oil reservoirs generally lead to the poorer oil recovery due to the early breakthrough and ineffective circulation of displacing fluids through the prevailing flowing channels. It is necessary to develop the oil-displacing agents or systems which can efficiently generate resistance at low viscosity to achieve better mobility control and significant heterogeneity control. Compared with HPAM, the abilities of the resistance factor generation, mobility control under homogenous condition and heterogeneity control under heterogenous condition of associative polymer（HAWSP） have been studied at a similar viscosity. The results show that, when at the similar viscosity, the resistance factor generated by HAWSP in the permeability range of （300 ~ 2 000）×10^-3 μm² is nearly four times of that generated by HPAM with the permeability of 300×10^-3 μm², and HAWSP has a significantly stable displacement front and obtains a higher EOR for oil with the viscosity of 110.7 mPa·s. When under the homogeneous conditions, HAWSP has similar behavior with HPAM in the aspects of polymer production and retention ratio. On the contrary, when under the heterogenous conditions, the former has a significantly higher retention ratio（63.4 %） than the latter（5.2 %）. When at a permeability contrast of 4 times, the fractional flow of HAWSP in the high and low permeability layers exhibits an obvious alternating movement, and HAWSP can enable subsequent water to maintain a high fractional flow in low permeability layer for a long time. When at a permeability contrast of 5 times, HAWSP can displace the most of the cluster-like residual oil trapped in the model, and the phenomenon of "drawing" and "oil bridging" can be also observed in the outer large flow channels. The results indicate that associative polymer has significant abilities to control mobility and adjust heterogeneity, which can also be demonstrated by associative polymer flooding field application in offshore oilfield. In a word, associative polymer has greater application potential in the development of heavy oil reservoirs.

Key words: heavy oil, associative polymer, HPAM, mobility control, heterogeneity adjustment

中图分类号:

TE357

梁严,王增林,史树彬,郭拥军,胡俊,罗平亚,张新民,曹苗,张伟,刘洋. 稠油驱替-流度控制与非均质性调整——缔合聚合物与HPAM对比[J]. 油气藏评价与开发, 2020, 10(6): 65-71.

LIANG Yan,WANG Zenglin,SHI Shubin,GUO Yongjun,HU Jun,LUO Pingya,ZHANG Xinmin,CAO Miao,ZHANG Wei,LIU Yang. Heavy oil displacement-mobility control and heterogeneity adjustment: Associative polymer versus HPAM[J]. Reservoir Evaluation and Development, 2020, 10(6): 65-71.

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聚合物	条件	注入质量浓度/ （mg·L^-1）	聚合物开始产出对应注入体积（PV）	产出聚合物浓度峰值/ （mg·L^-1）	峰值质量浓度对应注入体积（PV）	聚合物存聚率/ %
缔合聚合物	均质	1 200	0.70	1 026	1.05	14.0
缔合聚合物	非均质	1 200	0.95	694	1.10	63.4
HPAM	均质	1 200	0.65	978	1.15	11.5
	均质	2 000	0.65	1 580	1.05	27.9
	非均质	2 000	0.70	1 535	0.95	5.2

稠油驱替-流度控制与非均质性调整——缔合聚合物与HPAM对比

Heavy oil displacement-mobility control and heterogeneity adjustment: Associative polymer versus HPAM

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