考虑多因素的多层合采产液量劈分模式研究

doi:10.13809/j.cnki.cn32-1825/te.2022.06.014

Abstract

Abstract:

The application of multi-layer mining technology in reservoir is gradually extensive. Production splitting and stratification evaluation are regarded as important links, which affect the accuracy of dynamic reserve calculation and the reliability of development policy adjustment. However, the conventional formation coefficient（Kh） production splitting method still fails to fully consider the dynamic factors such as reservoir connectivity and pressure difference. Based on darcy formula and other seepage theory, a new production splitting method is put forward to clarify the role of the production of each layer in the development of reservoir. This method introduces the concept of “permeability contribution rate”, which is defined as the ratio of permeability of each layer to the sum of all permeability of high, middle and low layers, and comprehensively considers the relationship between permeability contribution rate, water content, and splitting coefficient, and proposes the production splitting of multi-layer mining with different permeability layers. Based on the research of eight groups of different permeability levels and polynomial regression calculation, the mathematical model for splitting of liquid production is established for different permeability layers considering water content, permeability range and other parameters. Through the comparison between the numerical simulation and the experimental test results, the splitting mode has small error and high accuracy, which can meet the needs of field application.

Key words: multi-layer mining, production splitting, numerical simulation, Darcy formula, seepage theory

CLC Number:

TE312

Haiyan ZHOU,Yunlai ZHANG,Xiao LIANG, et al. Liquid production splitting of multi-layer mining considering multiple factors[J]. Petroleum Reservoir Evaluation and Development, 2022, 12(6): 945-950.

Figures/Tables 12

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References 26

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组号	产液劈分系数	渗透率贡献率	无因次产液劈分系数
1	0.553 2	0.555 6	1.000 0
2	0.704 8	0.714 3	1.274 1
3	0.779 3	0.789 5	1.408 8
4	0.823 6	0.833 3	1.489 0
5	0.853 1	0.862 1	1.542 2
6	0.874 0	0.882 4	1.580 0
7	0.889 8	0.897 4	1.608 5
8	0.902 0	0.909 1	1.630 6

组号	产液劈分系数	渗透率贡献率	无因次产液劈分系数
1	0.318 6	0.333 3	1.549 0
2	0.205 7	0.214 3	1.000 0
3	0.160 8	0.157 9	0.781 9
4	0.131 6	0.125 0	0.640 1
5	0.111 0	0.103 4	0.539 8
6	0.094 5	0.088 2	0.464 1
7	0.084 3	0.076 9	0.410 1
8	0.075 3	0.068 2	0.366 3

实验组号	含水率	渗透率贡献率	计算产液劈分系数	实验产液劈分系数	相对误差
1	0.556	0.750 6	0.757 5	0.825 2	0.082 0
2	0.602	0.751 2	0.760 4	0.804 5	0.054 8
3	0.671	0.757 0	0.770 2	0.914 7	0.157 9
4	0.716	0.869 6	0.887 8	0.874 1	0.015 7
5	0.747	0.787 0	0.805 9	0.857 4	0.060 1
6	0.769	0.695 7	0.714 1	0.760 4	0.060 9
7	0.785	0.517 2	0.532 2	0.690 5	0.229 3
8	0.798	0.642 2	0.661 1	0.572 6	0.154 6
9	0.799	0.705 5	0.726 2	0.800 5	0.092 9

实验组号	含水率	渗透率贡献率	计算产液劈分系数	实验产液劈分系数	相对误差
1	0.556	0.167 7	0.171 5	0.157 8	0.087 1
2	0.602	0.195 1	0.194 2	0.178 8	0.085 9
3	0.671	0.186 9	0.178 6	0.036 0	3.961 8
4	0.716	0.103 5	0.103 5	0.112 9	0.082 9
5	0.747	0.130 1	0.125 2	0.123 5	0.013 5
6	0.769	0.262 3	0.236 4	0.218 0	0.084 5
7	0.785	0.448 3	0.392 9	0.238 0	0.651 0
8	0.798	0.321 1	0.285 3	0.407 2	0.299 4
9	0.799	0.214 6	0.195 5	0.179 5	0.088 9

Liquid production splitting of multi-layer mining considering multiple factors

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