三相泡沫体系堵水效果及影响因素实验研究

Abstract

Abstract:

As a new type of foam stabilizing material, nano-particles can significantly improve the stability of foam. The research and application of nano-particles have been paid much attention by petroleum researchers. Considering the demand of water plugging technology in Bohai Oilfield, and guided by the theory of physical chemistry, polymer materials and reservoir engineering, we studied the evaluation of basic performance and the physical simulation of water plugging effect of nano-particle nitrogen foam system according to the geological characteristics and fluids of typical reservoirs in Bohai by technical means such as instrument detection, chemical analysis and physical simulation. The results showed that when the concentration of foaming agent（PO-FASD） and stabilizer（SiO₂ nano-particle AEROSIL380） were about 0.3 %, the foaming agent and foam stabilizer could form the three phase foam system with nitrogen in excellent performance. With the increase of the reservoir permeability gradation, the effect of water flooding development got worse, and the effect of foam plugging and increasing oil increased. While with the increase of the water flooding recovery, the effects of foam plugging and oil increasing effect were improved. However, if the viscosity of crude oil increased, the effects of foam plugging and oil increasing effect would get worse. Thus, we could find that the three-phase foam system has good plugging and liquid flow steering ability, especially suitable for high water cut reservoir high permeability layer water plugging.

Key words: Bohai oilfield, three phase foam, nano-particles, water plugging, physical simulation

CLC Number:

TE357

Yunbao Zhang,Guorui Xu,Jian Zou, et al. Experimental study on water plugging effect and influence factors of three phase foam system[J]. Reservoir Evaluation and Development, 2019, 9(2): 44-49.

Figures/Tables 11

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References 24

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离子组成和含量							总矿化度
K⁺+Na⁺	Ca²⁺	Mg²⁺	Cl^-	SO₄^2-	CO₃^2-	HCO₃^-	总矿化度
2 758.3	627.7	249.4	6 313.3	91.4	0.0	166.5	10 206.5

起泡剂, %	起泡体积/mL	泡沫半衰期/min	析液半衰期/ s	泡沫综合指数/ （min·mL）
0.05	185	2	51	370
0.1	250	4	198	1 000
0.2	430	8	259	3 440
0.3	480	15	309	7 200
0.4	485	16	340	7 760
0.5	495	25	384	12 375

起泡剂, %	起泡体积/mL	泡沫半衰期/min	析液半衰期/ s	泡沫综合指数/（min·mL）
0.05	445	42	478	18 690
0.1	435	48	488	20 880
0.2	450	55	510	24 750
0.3	465	61	503	28 365
0.4	425	67	407	28 475
0.5	410	72	425	29 520

方案编号	小层渗透率K_g/ 10^-3μm²		含油饱和度, %	采收率,%
方案编号	小层渗透率K_g/ 10^-3μm²		含油饱和度, %	水驱	堵水	增幅
方案1-1	高渗层	7 302	77.63	65.11	65.77	0.66
	低渗层	499	65.80	4.52	51.61	47.09
	整体		72.98	43.63	60.75	17.12
方案1-2	高渗层	4 986	76.54	61.60	62.60	1.00
	低渗层	506	61.44	16.04	55.60	39.56
	整体		70.68	45.67	60.14	14.48
方案1-3	高渗层	2 516	75.35	58.17	61.98	3.81
	低渗层	494	64.74	37.06	62.50	25.44
	整体		70.62	49.54	62.19	12.65

方案编号	小层渗透率K_g/ 10^-3μm²		水驱程度, %	含油饱和度, %	采收率,%
方案编号	小层渗透率K_g/ 10^-3μm²		水驱程度, %	含油饱和度, %	水驱	堵水	增幅
方案2-1	高渗层	4 895	40	74.08	42.94	57.13	14.19
	低渗层	485		60.03	2.09	12.98	10.89
	整体			68.43	28.54	41.57	13.03
方案2-2	高渗层	4 717	90	75.17	54.84	60.16	5.33
	低渗层	502		59.83	3.86	37.27	33.41
	整体			68.87	36.64	51.99	15.35
方案2-3	高渗层	4 986	98	76.54	61.60	62.60	1.00
	低渗层	506		61.44	16.04	55.60	39.56
	整体			70.48	45.67	60.14	14.48

Experimental study on water plugging effect and influence factors of three phase foam system

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方案编号	小层渗透率K_g/ 10^-3μm²		原油黏度/（mPa·s）	含油饱和度, %	采收率,%
方案编号	小层渗透率K_g/ 10^-3μm²		原油黏度/（mPa·s）	含油饱和度, %	水驱	堵水	增幅
方案3-1	高渗层	4 995	15	75.07	66.31	67.59	1.28
	低渗层	495		62.66	12.14	56.31	44.17
	整体			70.27	47.65	63.70	16.06
方案3-2	高渗层	4 986	75	76.54	61.59	62.59	1.00
	低渗层	506		61.44	10.48	50.04	39.56
	整体			70.48	45.67	60.14	14.48
方案3-3	高渗层	5 146	300	75.51	58.10	59.03	0.93
	低渗层	473		52.14	5.24	37.47	32.24
	整体			66.39	41.89	52.42	10.53

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