温西三区块水驱全过程驱替特征变化规律

doi:10.7657/XJPG20260210

摘要/Abstract

摘要：

温米油田温西三区块历经近三十年注水开发，储集层孔隙度、渗透率及微观孔隙结构均发生变化，导致流体在储集层中的渗流特征也发生变化。为了进一步量化分析温西三区块储集层在水驱过程中的渗流特征变化，选用不同水淹程度下水驱前、后室内油水相对渗透率实验数据，采用水驱油解析法和牛顿迭代法，建立了水驱全过程油水相对渗透率数学模型和含水变化规律预测模型。结果表明，温西三区块生产含水变化规律与模型预测水驱规律一致；温西三区块开发中存在的主要问题是注水驱替速度过高和注入水引起黏土矿物颗粒运移、膨化堵塞，改变了储集层孔隙结构和润湿性，随着水驱程度的加深，束缚水饱和度和残余油饱和度逐渐增大，驱油效率逐渐下降，其中，平均束缚水饱和度增大0.067 7，平均残余油饱和度增大0.053 1，平均驱油效率下降0.142 8。

关键词: 温西三区块, 水驱, 驱替特征, 油水相对渗透率曲线, 水驱油解析法, 牛顿迭代法, 含水变化规律

Abstract:

After nearly 30 years of waterflooding development, the reservoir in Block WX-3 of Wenmi oilfield has changed in porosity, permeability and microscopic pore structure, resulting in variations of fluid flow behaviors in the reservoir. In order to further quantify the variations of flow behaviors during waterflooding in the reservoir in Block WX-3, using the experimental data of oil-water relative permeability before and after waterflooding at different watered-out levels, a mathematical model for oil-water relative permeability and a prediction model for water cut changes during the whole process of waterflooding development were constructed by virtue of waterflood analytical method and Newton iteration method. The results show that the actual water cut during production in Block WX-3 changes in a consistent pattern with the model prediction result. The main problems in the development of Block WX-3 are relatively high displacement rate in waterflooding, and the migration, expansion and blockage of clay particles caused by injected water, which alter the pore structure and wettability of the reservoir. Along with extension of water injection, the irreducible water saturation and residual oil saturation gradually increase, and the oil displacement efficiency gradually decreases. Specifically, on average, the irreducible water saturation increases by 0.067 7, the residual oil saturation increases by 0.053 1, and the oil displacement efficiency decreases by 0.142 8.

Key words: Block WX-3, waterflooding, displacement characteristic, oil-water relatively permeability, waterflood analytical method, Newton iteration method, water cut variation

中图分类号:

TE341

徐云恒, 任波, 耿子渊, 吴锦彪. 温西三区块水驱全过程驱替特征变化规律[J]. 新疆石油地质, 2026, 47(2): 210-221.

XU Yunheng, REN Bo, GENG Ziyuan, WU Jinbiao. Variations of Displacement Characteristics During the Whole Process of Waterflooding in Block WX-3[J]. Xinjiang Petroleum Geology, 2026, 47(2): 210-221.

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岩样编号	深度/m	气测渗透率/mD	油层水淹程度	水驱前				水驱后
岩样编号	深度/m	气测渗透率/mD	油层水淹程度	束缚水饱和度	残余油饱和度	油水相渗流区间	驱油效率	束缚水饱和度	残余油饱和度	油水相渗流区间	驱油效率
C1	2 288.44	48.89	未水淹	0.397 9	0.210 9	0.391 2	0.649 7	0.410 3	0.300 3	0.289 4	0.490 8
441	2 291.01	214.95	未水淹	0.389 4	0.178 3	0.432 3	0.708 0	0.446 1	0.223 6	0.330 3	0.596 3
X19	2 376.66	36.57	弱水淹	0.441 3	0.276 6	0.282 1	0.504 9	0.492 1	0.309 7	0.198 2	0.390 2
11	2 381.41	40.41	中水淹	0.418 9	0.263 9	0.317 2	0.545 9	0.478 9	0.296 4	0.224 7	0.431 2
S2	2 321.06	160.64	中水淹	0.401 6	0.248 7	0.349 7	0.584 4	0.456 2	0.278 4	0.265 4	0.488 0
M4-2	2 330.03	107.03	强水淹	0.426 5	0.251 8	0.321 7	0.560 9	0.435 2	0.254 9	0.309 9	0.548 7

岩样编号	水驱前油相					水驱前水相
岩样编号	K_rowi	n	b	k	相关系数	K_rwor	m	c	d	相关系数
C1	1.000 0	2.021 7	-0.529 3	4.073 0	0.999 8	0.282 0	1.856 6	-0.853 8	1.621 5	0.999 8
441	1.000 0	3.792 1	-2.542 2	1.910 9	0.999 2	0.352 1	1.886 9	-1.575 3	1.988 0	0.999 8
X19	1.000 0	1.634 9	0.098 3	0.950 7	0.999 9	0.159 4	4.831 3	-7.456 6	0.953 6	1.000 0
11	1.000 0	1.827 3	-0.151 2	3.840 9	1.000 0	0.165 3	1.782 7	-2.545 5	2.501 3	0.999 7
S2	1.000 0	-0.350 2	2.126 5	0.198 5	1.000 0	0.184 4	0.920 0	-2.783 3	2.221 5	1.000 0
M4-2	1.000 0	3.749 9	-2.295 5	1.865 9	1.000 0	0.173 4	1.729 0	-3.736 7	1.832 6	0.999 5
C1	1.000 0	2.059 5	-0.043 8	0.348 5	1.000 0	0.231 8	1.653 0	-1.305 8	0.870 5	1.000 0
441	1.000 0	1.850 4	-0.222 7	2.325 4	1.000 0	0.251 7	0.946 2	-2.021 1	1.732 4	0.999 9
X19	1.000 0	1.809 1	0.129 4	1.094 3	1.000 0	0.136 1	1.041 4	-1.255 7	0.957 8	0.999 4
11	1.000 0	1.558 7	0.355 9	3.965 3	1.000 0	0.144 5	0.887 6	-1.469 5	1.993 2	1.000 0
S2	1.000 0	-0.974 6	2.657 7	0.239 7	1.000 0	0.171 5	1.160 7	-2.032 9	1.580 7	0.999 8
M4-2	1.000 0	3.250 7	-1.545 3	0.804 8	1.000 0	0.177 7	2.043 7	-4.955 1	1.968 1	0.998 8

岩样编号	水驱前				水驱后
岩样编号	油水共渗点含水饱和度	前缘含水饱和度	前缘后平均含水饱和度	前缘含水率	油水共渗点含水饱和度	前缘含水饱和度	前缘后平均含水饱和度	前缘含水率
C1	0.644 7	0.665 6	0.728 0	0.810 8	0.585 0	0.595 1	0.645 4	0.786 1
441	0.601 3	0.608 3	0.675 1	0.766 1	0.632 7	0.600 3	0.693 7	0.622 8
X19	0.624 7	0.640 8	0.685 7	0.816 4	0.624 0	0.639 2	0.668 7	0.833 0
11	0.637 4	0.666 3	0.706 2	0.861 0	0.636 6	0.664 4	0.686 0	0.895 7
S2	0.625 9	0.637 8	0.703 9	0.781 4	0.642 0	0.670 5	0.702 5	0.870 0
M4-2	0.589 6	0.595 9	0.646 2	0.770 8	0.613 4	0.623 2	0.674 7	0.785 3

油相参数	斜率	截距	相关系数	水相参数	斜率	截距	相关系数
K_rowiSwd	0	1.000 0	1.000 0	K_rworSwd	-0.047 2	0.249 1	1.000 0
n_Swd	-1.335 1	2.681 0	1.000 0	m_Swd	-0.468 5	1.723 0	1.000 0
b_Swd	1.702 0	-1.323 0	1.000 0	c_Swd	-0.059 4	-2.340 7	1.000 0
k_Swd	-0.851 8	2.235 2	1.000 0	d_Swd	-0.414 5	2.049 8	1.000 0
S_orSwd	0.046 1	0.213 6	1.000 0	S_wiSwd	0.064 6	0.384 4	1.000 0