基于数值模拟的流势分析技术在缝洞型油藏开发中的应用

doi:10.13809/j.cnki.cn32-1825/te.2020.02.014

Abstract

Abstract:

The energy of fluid in oil reservoir determines the direction of fluid flow. In order to study the energy distribution of fluid in fractured-vuggy reservoirs, a theoretical model of fluid potential is established, and the 3D fluid potential characterization method is determined. The mechanism models of four typical fractured-vuggy structures, single hole with bottom water, single hole with side water, double hole with bottom water and double hole with side water, are use to study the change rules of flow potential, and five main control factors affecting the flow potential adjustment effect are determined, finally, the research on potential tapping of residual oil was carried out in combination with flow potential analysis. The results show that the adjustment of flow potential for the model of single hole with bottom water make the production wells work best. The model’s water multiple is the decisive factor, and the flow potential regulation effect is better when the water multiple is less than 10 times. The greater the discharge, the better the effect of water control for production wells. The proposed fluid potential solving model of fractured and cavern reservoir can truly reflect the changing rules of fluid energy distribution in the actual formation.

Key words: fractured-vuggy reservoir, flow adjustment, 3D potential field, mechanism model, Tahe oilfield

CLC Number:

TE344

Chunhui DU,He QIU,Xiaofan CHEN, et al. Application of flow potential analysis technique based on numerical simulation in the development of fractured-vuggy reservoir[J]. Reservoir Evaluation and Development, 2020, 10(2): 83-89.

Figures/Tables 10

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References 24

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水侵方向	模型类型	调流势主控因素					调流势效果
水侵方向	模型类型	水体倍数	水体连通位置	排采比例	排采位置	排采井距	调流势效果
底水	单洞	≤20倍	水体连通远井	3∶1~5∶1	排低采高	近井部位	见效
		>20倍		> 7∶1	排低采高		见效
		50倍	水体连通中部	> 5∶1	排低采高		效果差
		50倍	水体连通近井	5∶1			负效
	双洞	≤20倍		3∶1~5∶1	排低采高		见效
	双洞	>20倍		> 10∶1			效果差
边水	单洞	≤20倍		3∶1~5∶1	排低采高	近井部位	见效
	单洞	>20倍		> 7∶1			见效
	双洞	≤10倍		3∶1~5∶1	排低采高		见效
	双洞	> 10倍		> 10∶1			效果差

Application of flow potential analysis technique based on numerical simulation in the development of fractured-vuggy reservoir

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