驱油用聚合物在渤海油田中高渗储层的适应性实验研究

doi:10.13809/j.cnki.cn32-1825/te.2020.06.006

摘要/Abstract

摘要：

针对渤海油田中高渗储层（渗透率为（200~1 000）×10^-3μm²）,在模拟油藏条件下,对3种聚驱用聚合物（线性聚合物、疏水缔合聚合物、聚表剂）,开展了流变性、热稳定性、黏弹性和运移性研究。流变性测试结果显示,在低剪切速率下（模拟油藏深部,5.88~14.42 s^-1）,疏水缔合聚合物和聚表剂黏度较大;在高剪切速率下（模拟近井地带,149.9~223.4 s^-1）,3种聚合物的黏度均较低。振荡频率测试结果表明,疏水缔合聚合物和聚表剂弹性较大,储能模量高于损耗模量。传导性实验结果显示,线性聚合物和聚表剂在多孔介质中的传导性较好,疏水缔合聚合物的传导性较差。透射电镜和激光粒度仪表征结果表明,疏水缔合聚合物的聚集体尺寸较大（1.22 μm）,线性聚合物（0.28 μm）和聚表剂（0.52 μm）与油藏孔喉（4 μm）的配伍性优于疏水缔合聚合物。研究结果表明：对于目标储层,聚表剂与储层的适应性更好,其次为线性聚合物,疏水缔合聚合物与该储层的适应性较差。海上储层聚驱用聚合物的筛选,需要将聚合物的流变性能与油藏适应性及分子微观结构结合考虑,建立一种多尺度的聚合物筛选评价方法。该研究对海上油田聚驱用聚合物的筛选具有一定的参考意义。

关键词: 聚合物驱, 线性聚合物, 聚表剂, 疏水缔合聚合物, 流变性能, 运移性, 封堵性能

Abstract:

In order to explore the medium-high permeability reservoir with the permeability of （200~1 000）×10^-3 μm², the rheological behavior, thermal stability, viscoelasticity, and propagation performance of three kinds of polymer（linear polymer, hydrophobic association of partially hydrolyzed polyacrylamide（HAHPAM）, and active polymer） acting as the chemical flooding agents in Bohai Bay, are studied under the simulated reservoir condition. Results of rheological behavior indicate that HAHPAM and active polymer solutions exhibit shear thickening at low shearing rate（simulation of deep reservoir, 5.88~14.42 s^-1）, and all three polymers show shear thinning at high shear rates（simulation of immediate vicinity of wellbore, 149.9~223.4 s^-1）. The oscillation frequency measurements show that HAHPAM and active polymer have larger elasticity, and their storage modulus are greater than their loss modulus. Results of sand-pack flow experiments show that linear polymer and active polymer can propagate better in porous media to achieve in-depth conformance control, whereas HAHPAM shows poor propagation behavior. The results of TEM and LPSA indicate that HAHPAM shows larger aggregation sizes（1.22 μm）, and the compatibility of linear polymer（0.28 μm） and active polymer（0.52 μm） with pore throats（4 μm） of reservoirs is better than that of HAHPAM. The results show that for the target reservoir, the polymer has better adaptability to the reservoir, followed by the linear polymer, while the hydrophobic association polymer has poor adaptability to the reservoir. The selection of polymer for polymer flooding in offshore reservoirs needs to consider the rheological properties of polymer, reservoir adaptability, and molecular microstructures so as to establish a multi-scale evaluation method for polymer screening. This study has a certain significance for screening polymer for polymer flooding in offshore oilfields.

Key words: polymer flooding, linear polymer, active polymer, HAHPAM, rheological properties, propagation properties, plugging effect

中图分类号:

TE357

于萌,铁磊磊,李翔,张博,刘文辉,常振. 驱油用聚合物在渤海油田中高渗储层的适应性实验研究[J]. 油气藏评价与开发, 2020, 10(6): 40-45.

YU Meng,TIE Leilei,LI Xiang,ZHANG Bo,LIU Wenhui,CHANG Zhen. Experiments on adaptability of polymer flooding for medium-high permeability reservoir in Bohai Oilfield[J]. Reservoir Evaluation and Development, 2020, 10(6): 40-45.

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参考文献 20

[1]	谢坤, 卢祥国, 姜维东, 等. 抗盐聚合物储层适应性及其作用机制[J]. 中国石油大学学报(自然科学版), 2017,41(3):145-147.
	XIE K, LU X G, JIANG W D, et al. Reservoir adaptability of salt-resistant polymer and its mechanism[J]. Journal of China University of Petroleum(Edition of Natural Science), 2017,41(3):145-147.
[2]	李宗阳, 王业飞, 曹绪龙, 等. 新型耐温抗盐聚合物驱油体系设计评价及应用[J]. 油气地质与采收率, 2019,26(2):106-112.
	LI Z Y, WANG Y F, CAO X L, et al. Design evaluation and application of a novel temperature- resistant and salt-tolerant polymer flooding system[J]. Petroleum Geology and Recovery Efficiency, 2019,26(2):106-112.
[3]	高梦天, 杜学斌, 叶茂松, 等. 渤海湾盆地石臼坨凸起东缘混积岩储层特征及物性主控因素[J]. 油气地质与采收率, 2017,24(3):50-56.
	GAO M T, DU X B, YE M S, et al. Characteristics of the mixosedimentite reservoir and its controlling factors for petrophysical properties in the eastern margin of Shijiutuo uplift, Bohai Bay Basin[J]. Petroleum Geology and Recovery Efficiency, 2017,24(3):50-56.
[4]	邓景夫, 吴晓慧, 王刚, 等. 绥中油田各项措施增油效果劈分方法[J]. 油气地质与采收率, 2017,24(2):107-110.
	DENG J F, WU X H, WANG G, et al. Splitting method of incremental oil effect by composite measures in Suizhong oilfield[J]. Petroleum Geology and Recovery Efficiency, 2017,24(2):107-110.
[5]	黄新春, 梁凤儒, 马绪鹏, 等. 海上油田井下增压泵注聚合物可行性试验研究[J]. 石油机械, 2017,45(2):50-53.
	HUANG X C, LIANG F R, MA X P, et al. Feasibility test of polymer injection by reversed ESP for offshore oilfield[J]. China Petroleum Machinery, 2017,45(2):50-53.
[6]	钟锴, 朱伟林, 薛永安, 等. 渤海海域盆地石油地质条件与大中型油气田分布特征[J]. 石油与天然气地质, 2019,40(1):92-100.
	ZHONG K, ZHU W L, XUE Y A, et al. Petroleum geologic conditions and distributional features of large-and medium-sized oil and gas fields in Bohai Sea Basin[J]. Oil & Gas Geology, 2019,40(1):92-100.
[7]	王美楠, 张宏友, 王少鹏, 等. 聚驱稠油数字岩心模型建立及驱替规律分析[J]. 石油机械, 2019,47(8):87-93.
	WANG M N, ZHANG H Y, WANG S P, et al. Establishment of digital core modeling and displacement analysis for polymer flooding in heavy oil reservoir[J]. China Petroleum Machinery, 2019,47(8):87-93.
[8]	王斐斐, 王子振, 舒腾飞. 聚合物分散溶解系统数值模拟研究[J]. 石油机械, 2018,46(10):65-71.
	WANG F F, WANG Z Z, SHU T F. Numerical simulation study on polymer dispersion and dissolution system[J]. China Petroleum Machinery, 2018,46(10):65-71.
[9]	王刚, 刘斌, 王欣然, 等. 海上油田水聚干扰影响因素分析及矿场试验研究[J]. 石油地质与工程, 2020,34(1):91-95.
	WANG G, LIU B, WANG X R, et al. Influencing factors analysis and field test of water and polymer interference in offshore oilfields[J]. Petroleum Geology and Engineering, 2020,34(1):91-95.
[10]	GHOUMRASSI-BARR S, ALIOUCHE D. A rheological study of Xanthan polymer for enhanced oil recovery[J]. Journal of Macromolecular Science(Part B), 2016,55(8):204-206.
[11]	张云宝, 卢祥国, 王婷婷, 等. 渤海油藏优势通道多级封堵与调驱技术[J]. 油气地质与采收率, 2018,25(3):82-88.
	ZHANG Y B, LU X G, WANG T T, et al. Study on technology of multi-stage plugging and profile control for advantage channels in Bohai Oilfield[J]. Petroleum Geology and Recovery Efficiency, 2018,25(3):82-88.
[12]	王晓超, 王锦林, 魏俊, 等. 渤海B油田水驱储层孔喉尺寸变化分析及应用[J]. 海洋石油, 2018,38(3):31-35.
	WANG X C, WANG J L, WEI J, et al. Analysis and application of reservoir pore throat size change after water flooding in B Oilfield of Bohai[J]. Offshore Oil, 2018,38(3):31-35.
[13]	陈文林. 聚驱后强水洗油层微观剩余油量化分布及挖潜研究[J]. 海洋石油, 2017,37(4):47-52.
	CHEN W L. Study of distribution and potentiality exploiting of microscosmic residual oil in strong water-washing layer after polymer flooding[J]. Offshore Oil, 2017,37(4):47-52.
[14]	陈晶, 湛祥惠. 化学驱微观剩余油启动顺序及驱油效果实验研究[J]. 海洋石油, 2018,38(2):46-53.
	CHEN J, ZHAN X H. Experimental study on the startup sequence and oil displacement efficiency of micro remaining oil by chemical flooding[J]. Offshore Oil, 2018,38(2):46-53.
[15]	李石权, 范莉红, 邓彩云, 等. 特高含水油藏开发后期剩余油精准挖潜技术[J]. 非常规油气, 2019,6(1):62-68.
	LI S Q, FAN L H, DENG C Y, et al. Precise drilling technology for residual oil in the later stage of development of extra-high water-cut reservoir[J]. Unconventional Oil & Gas, 2019,6(1):62-68.
[16]	王成俊, 洪玲, 高瑞民, 等. 低渗透油藏提高采收率技术现状与挑战[J]. 非常规油气, 2018,5(3):102-108.
	WANG C J, HONG L, GAO R M, et al. Status-quo and challenges of enhanced oil recovery in low permeability reservoirs[J]. Unconventional Oil & Gas, 2018,5(3):102-108.
[17]	吕洲, 王玉普, 李莉, 等. 油气储层岩心实验的样本量设计[J]. 石油实验地质, 2018,40(4):589-594.
	LYU Z, WANG Y P, LI L, et al. Sample size design for oil and gas reservoir core-plug experiments[J]. Petroleum Geology & Experiment, 2018,40(4):589-594.
[18]	杨彬, 高建崇, 吴彬彬, 等. 渤海Q油田三种不同驱油体系传输运移能力对比研究[J]. 石油地质与工程, 2019,33(5):84-87.
	YANG B, GAO J C, WU B B, et al. Comparative study on transmission and migration capacity of three different oil displacement systems in Bohai Q oilfield[J]. Petroleum Geology and Engineering, 2019,33(5):84-87.
[19]	王业飞, 曲正天, 张菁, 等. 高渗区分布形态对砾岩油藏聚合物驱窜流的影响[J]. 油气地质与采收率, 2019,26(6):92-99.
	WANG Y F, QU Z T, ZHANG J, et al. Influence of distribution patterns of high-permeability zones on polymer crossflow in conglomerate oil reservoirs[J]. Petroleum Geology and Recovery Efficiency, 2019,26(6):92-99.
[20]	王欣然, 周凤军, 刘斌, 等. 海上注聚油田聚合物强化泡沫驱实验研究与应用[J]. 石油地质与工程, 2019,33(1):92-96.
	WANG X R, ZHOU F J, LIU B, et al. Experimental study and application of polymer enhanced foam flooding in offshore polymer injecting oilfield[J]. Petroleum Geology and Engineering, 2019,33(1):92-96.

水型	阳离子			阴离子				总矿化度
水型	Ca²⁺	Mg²⁺	Na⁺	CO₃^2-	HCO₃^-	Cl^-	SO₄^2-	总矿化度
模拟水	568.9	228.9	2 551.9	0	190.6	5 470.7	36.6	9 047.6

聚合物类型	η₀	λ	n	R²
聚合物A	66.436 4	-2.928 9	0.698 7	0.973 6
聚合物B	910.052 4	-14.995 7	0.477 1	0.991 3
聚合物C	407.544 3	4.495 9	0.626 4	0.995 9

聚合物类型	分子回旋半径（r_p）/μm	孔喉尺寸（r_h）/μm	r_h/r_p	传导结果
线性聚合物	0.28	4.00	14.29	良好
聚表剂	0.52	4.00	7.69	良好
疏水缔合聚合物	1.22	4.00	3.28	差