注水井解调联作选井选层方法研究与应用

摘要/Abstract

摘要：

解调联作是强非均质性油藏受伤害注水井解除污染堵塞,控制高渗层吸水强度,改善注水效果的有效手段。影响解调联作效果的因素很多,且各个因素之间具有复杂的非线性关系,传统的统计方法应用受到诸多限制。在对注水井解调联作效果影响因素分析的基础上,采用皮尔逊相关系数法计算各因素与增注比的相关系数,以此为依据确定各因素间的相对重要度,结合模糊层次分析法确定各因素的权重,进而达到优化选井选层的目的。应用新方法对渤海油田X区块注水井进行了实例计算,决策值大小与现场作业效果吻合度高,验证了该方法可靠性,且计算简单快速,为提高解调联作的成功有效率提供了有力保障。

关键词: 解调联作, 选井选层, 相关系数, 层次分析

Abstract:

The acidizing-water shutoff joint operation technology is an effective method to resolve the plugging, control the water injection profile, and improve the injection effect of the damaged injection wells with the strong heterogeneity. There are many factors affecting the effectiveness of the acidizing-water shutoff joint operation. Due to the complex nonlinear relations of the various factors, the traditional statistical methods is limited. To solve this problem, and based on the analysis of the effect of the acidizing-water shutoff joint operation for the water injection wells, we calculate the correlation coefficients between the factors and the increasing injection ratio by the pearson correlation coefficient method. And according to the correlation coefficient, the relative importance of each factor is determined. Then, the weight of each factor is decided by the fuzzy analytical hierarchy process. This new method is used to calculate the injection wells in the Bohai Oilfield, and the decision value is consistent with the results of the field operation. This method is reliable and simples and provide the powerful guarantee for improving the success rate of acidizing-water shutoff joint operation for injection wells.

Key words: acidizing-water shutoff joint operation, Well and layer selection, correlation coefficient, hierarchical analysis

中图分类号:

TE357

赵立强,鲜超,罗志锋,兰夕堂. 注水井解调联作选井选层方法研究与应用[J]. 油气藏评价与开发, 2018, 8(1): 54-57.

Zhao Liqiang,Xian Chao,Luo Zhifeng,Lan Xitang. Research and application of candidate injection well and layer selection method for acidizing-water shutoff joint operation[J]. Reservoir Evaluation and Development, 2018, 8(1): 54-57.

图/表 6

表1

重要程度标度"

标度	定义	说明	对应相关系数
0.5	同等重要	两元素相比,同等重要	[0,0.2]
0.6	稍微重要	两元素相比,一元素比另一元素稍微重要	[0.2,0.4]
0.7	明显重要	两元素相比,一元素比另一元素明显重要	[0.4,0.6]
0.8	重要得多	两元素相比,一元素比另一元素重要得多	[0.6,0.8]
0.9	极端重要	两元素相比,一元素比另一元素极端重要	[0.8,1]
0.1,0.2,0.3,0.4	反比较	若元素 $a i$ 比 $a j$ 得到判断矩阵 $r ij$ ,则元素 $a j$ 比 $a i$ 得到判断矩阵 $r ji$ =1- $r ij$ 。

表1

表2

12口注水井的特征数据"

井号	H/m	$K ?$ /10^-3μm²	$K V$	$J ?$	$W ?$	$W V$	LT	Unp	WCUT	QZ	$I w$	S	P
A1	22.3	418.1	0.6	1.8	0.3	0.3	0.3	0.8	0.7	0.2	0.8	10.0	0.4
A2	47.1	1 279.7	1.0	1.4	0.3	0.7	0.4	0.8	0.4	0.8	0.8	12.0	5.2
A3	33.3	785.4	1.0	1.2	0.5	1.0	0.8	0.8	0.3	0.2	1.0	38.0	10
A4	44.3	1 875.4	0.8	0.5	0.5	0.6	0.4	0.7	0.4	0.2	0.5	22.0	2.5
A5	40.0	886.0	0.7	1.5	0.4	0.8	0.4	0.6	0.5	0.0	0.6	12.0	0.5
A6	40.9	642.3	0.9	1.3	0.4	1.0	0.6	0.8	0.9	0.5	0.4	29.0	10
A7	12.7	283.2	0.9	1.3	0.7	0.5	0.7	0.7	0.0	0.1	0.4	8.0	1.8
A8	47.1	1 279.7	1.0	0.9	0.3	0.7	0.5	0.8	0.7	0.4	0.5	14.0	5.8
A9	40.9	642.3	0.9	1.4	0.4	0.5	0.6	0.8	0.9	0.3	0.4	15.0	5.1
A10	5.1	288.6	0.4	1.2	0.3	0.3	0.4	0.6	0.4	0.8	0.7	38	0.5
A11	28.3	1080.9	0.6	1.5	0.4	1.0	0.7	0.6	0.5	0.5	0.4	15	2.8
A12	21.8	867.9	0.7	1.3	0.5	0.6	0.6	0.7	0.5	0.3	0.6	18	2.6

表2

表3

各影响因素与增注比的相关性"

因素	H	$K ?$	$K V$	$J ?$	$W ?$	$W V$	LT	Unp	WCUT	QZ	$I w$	S
相关系数	0.33	0.01	0.74	0.19	0.01	0.79	0.67	0.69	0.25	0.42	0.16	0.86

表3

表4

区块解调联作选井各因素权重"

因素	H	$K$	$K V$	$J ?$	$W ?$	$W V$	LT	Unp	WCUT	QZ	$I w$	S
权重	0.075	0.058	0.108	0.058	0.058	0.075	0.108	0.108	0.075	0.092	0.058	0.125

表4

表5

图1

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