聚合物驱有效流度控制时间范围及其影响因素研究

Abstract

Abstract:

The study on the effective control time range of polymer flooding and its influencing factors is conducive to the further development of oil recovery measures after polymer flooding. Based on the theory of characteristic curve of water flooding reservoir and the mobility controlling mechanism of polymer flooding, a judgment method was established, and the influencing factors were analyzed through the indoor flooding experiments. The results showed that there were some differences in the water flooding characteristic curves before and after polymer flooding. With the follow-up process of water flooding, its rule would gradually return to the original rule before polymer flooding. It was feasible to judge the effective mobility control range of polymer flooding by the consistency of the characteristic curve of water flooding before and after polymer flooding. The effect of increasing the viscosity of polymer solution on its mobility control time was relatively small, only 10 ^-2 order of magnitude of PV injection. Increasing the residual resistance factor（RRF） could significantly prolong the effective mobility control time of polymer flooding, and reached 10 ^-1 order of magnitude of PV injection. The residual resistance coefficient of polymer is the main factor affecting the effective mobility control time.

Key words: polymer flooding, mobility control, characteristic curve of water flooding, solution viscosity, residual resistance factor

CLC Number:

TE357

SHI Leiting,ZHU Shijie,ZOU Jian,XUE Xinsheng,ZHAO Wensen,YE Zhongbin. Study on effective mobility control time ramge and influencing factors of polymer flooding[J].Reservoir Evaluation and Development, 2019, 9(4): 31-35.

Figures/Tables 8

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References 16

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瞬时含水率率,%	后续水驱过程中实验取样点下的采出程度,%
瞬时含水率率,%	第一个点	第二个点	第三个点	第四个点	第五个点
84.21	46.50	—	—	—	—
89.29	47.50	47.50	—	—	—
89.09	48.33	48.33	48.33	—	—
90.74	49.00	49.00	49.00	49.00	—
92.73	49.50	49.50	49.50	49.50	49.50
94.83	50.00	50.00	50.00	50.00	50.00
94.64	50.50	50.50	50.50	50.50	50.50
94.44	50.83	50.83	50.83	50.83	50.83
96.43	51.17	51.17	51.17	51.17	51.17
96.15	51.50	51.50	51.50	51.50	51.50
96.30	51.83	51.83	51.83	51.83	51.83
拟合的曲线公式	y=108.09ln（x）-329.5	y=95.436ln（x）-279.88	y=104.59ln（x）-315.8	y=92.986ln（x）-270.22	y=72.569ln（x）-189.91

体系	不同黏度的体系			体系	不同残余阻力系数的体系
体系	黏度/ （mPa·s）	阻力系数	残余阻力系数	体系	黏度/ （mPa·s）	阻力系数	残余阻力系数
H₁	10.1	30.0	5.8	H₁	10.1	30.0	5.8
H₂	18.5	43.5	6.4	M₂	8.8	71.4	21.3
H₃	32.2	60.0	6.9	HM₃	9.2	112.5	28.1

体系	水驱特征曲线	后续水驱特征曲线	驱替范围值
H₁	y=206.84ln（x）-562.93 R²=0.995 5	y=206.11ln（x）-751.69 R²=0.971 7	0~0.323PV
H₂	y=260.31ln（x）-775 R²=0.960 5	y=254.4ln（x）-972.14 R²=0.944 1	0~0.318PV
H₃	y=255.96ln（x）-744.75 R²=0.998 7	y=253.26ln（x）-999.44 R²=0.790 7	0~0.329PV

体系	水驱特征曲线	后续水驱特征曲线	驱替范围值
H₁	y=206.84ln（x）-562.93 R²=0.995 5	y=206.11ln（x）-751.69 R²=0.971 7	0~0.323 PV
M₂	y=130.78ln（x）-362.76 R²=0.960 9	y=135.33ln（x）-472.97 R²=0.992	0~0.422 PV
HM₃	y=320.34ln（x）-991.15 R²=0.971 6	y=324.38ln（x）-1 288.5 R²=0.961 5	0~0.484 PV

Study on effective mobility control time ramge and influencing factors of polymer flooding

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