基于聚合物驱的多级非均相调驱研究

doi:10.13809/j.cnki.cn32-1825/te.2020.06.014

Abstract

Abstract:

In order to solve the problems of serious heterogeneity, breakthrough of injected water along high permeability zone, low recovery percent of reserves and limited EOR capability of water flooding in the middle and low permeability fault-block reservoir of Wang-17 Block in Wangji Oilfield, the EOR technology of chemical flooding has been studied, and polymer and preformed particle gel（PPG） have been evaluated and screened. The slug structure, oil displacement efficiency and diversion rate of heterogeneous oil displacement system formed by compounding have been evaluated by physical simulation technology. And the slug volume and structure have been optimized by numerical simulation technology. It is confirmed that multi-stage heterogeneous profile control and slug polymer flooding can improve the recovery rate in Wang-17 Block by 8.25 percentage points. The field application has achieved initial results. This technology has been used for reference and popularized in the polymer flooding project of B238 Block in Xiaermen Oilfield.

Key words: polymer flooding, multi-stage slug, heterogeneous flooding, physical simulation, numerical simulation optimization

CLC Number:

TE357

Xiaojing ZHANG,Jun LU,Zhuo ZHANG, et al. Research on multi-stage heterogeneous flooding based on polymer flooding[J]. Reservoir Evaluation and Development, 2020, 10(6): 90-95.

Figures/Tables 6

Fig. 1

Table 1

Table 2

Table 3

Table 4

Table 5

References 20

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配方	岩心种类	空气渗透率/μm²	孔隙度/ %	水驱采收率/%	水驱分流率/%	化学驱分流率/%	后续水驱分流率/%	最终采收率/%	采收率提高百分点
0.6PV（P）	低渗岩心	0.257	18.66	25.85	2	10 ~ 85	2	56.13	30.28
	高渗岩心	0.498	22.76	67.17	98	85 ~ 90	98	76.64	9.47
	并联岩心			49.10				67.00	17.90
0.1PV（PPG/P）+0.4PV（P）+ 0.1PV（PPG/P）	低渗岩心	0.204	16.35	31.03	3	20 ~ 30	2	55.13	24.10
	高渗岩心	0.569	23.15	42.08	97	70 ~ 80	98	63.79	21.71
	并联岩心			36.96				59.77	22.81
0.1PV（PPG/P）+0.2PV（P）+0.05PV（PPG/P）+0.2PV（P）+0.05PV（PPG/P）	低渗岩心	0.213	16.81	17.31	2	35 ~ 40	15	59.87	42.56
	高渗岩心	0.654	25.09	39.44	98	60 ~ 65	85	63.01	23.57
	并联岩心			32.04				61.96	29.92

注入段塞（PV）	增油量/ 10⁴t	聚合物量/ t	采收率提高百分点	吨聚增油/ （t·t^-1）	综合指标
0.3	3.19	706	4.15	45.2	1.88
0.4	4.36	941	5.67	46.3	2.63
0.5	5.28	1 176	6.87	44.9	3.09
0.6	5.58	1 411	7.26	39.6	2.87
0.7	5.65	1 646	7.35	34.3	2.52

前置段塞（PV）	累积增油/10⁴t	采收率提高百分点
0.03	5.32	6.92
0.04	5.48	7.13
0.05	5.63	7.32
0.06	5.71	7.42
0.07	5.75	7.48
0.08	5.79	7.53

分类	前置段塞（PV）	主体段塞（PV）	后置段塞（PV）
不组合	0.05	0.4（P）	0.05
不组合	0.05	0.4（PPG/P）	0.05
一次组合（一级）	0.05	0.19（P）+0.02（PPG/P）+0.19（P）	0.05
	0.05	0.18（P）+0.04（PPG/P）+0.18（P）	0.05
	0.05	0.17（P）+0.06（PPG/P）+0.17（P）	0.05
	0.05	0.16（P）+0.08（PPG/P）+0.16（P）	0.05
	0.05	0.15（P）+0.10（PPG/P）+0.15（P）	0.05
二次组合（二级）	0.05	0.13（P）+0.01（PPG/P）+0.13（P）+0.01（PPG/P）+0.12（P）	0.05
	0.05	0.12（P）+0.02（PPG/P）+0.12（P）+0.02（PPG/P）+0.12（P）	0.05
	0.05	0.12（P）+0.03（PPG/P）+0.11（P）+0.03（PPG/P）+0.11（P）	0.05
	0.05	0.11（P）+0.04（PPG/P）+0.11（P）+0.04（PPG/P）+0.10（P）	0.05
	0.05	0.10（P）+0.05（PPG/P）+0.10（P）+0.05（PPG/P）+0.10（P）	0.05

主体段塞组合方式		累增油/ 10⁴t	采收率提高百分点	干粉用量/ t	吨聚增油/ （t·t^-1）	综合指标
级数	尺寸（PV）	累增油/ 10⁴t	采收率提高百分点	干粉用量/ t	吨聚增油/ （t·t^-1）	综合指标
不组合	聚合物驱	5.94	7.72	1 439	41.3	3.2
不组合	非均相	7.38	9.71	2 138	34.9	3.4
一次组合（一级）	0.02（非均相）	6.10	7.93	1 466	41.6	3.3
	0.04（非均相）	6.22	8.09	1 494	41.7	3.4
	0.06（非均相）	6.28	8.16	1 521	41.3	3.4
	0.08（非均相）	6.31	8.20	1 548	40.7	3.3
	0.10（非均相）	6.32	8.22	1 576	40.1	3.3
二次组合（二级）	0.02（非均相）	6.21	8.08	1 466	42.4	3.4
	0.04（非均相）	6.34	8.25	1 494	42.5	3.5
	0.06（非均相）	6.40	8.32	1 521	42.1	3.5
	0.08（非均相）	6.43	8.36	1 548	41.5	3.5
	0.10（非均相）	6.44	8.38	1 576	40.9	3.4

Research on multi-stage heterogeneous flooding based on polymer flooding

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