致密储层水平井段内多簇压裂多裂缝扩展研究

doi:10.13722/j.cnki.jrme.2017.0768

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Abstract

In order to study the mechanism of multiple-fracture unevenly growth in multi-cluster fracturing，we simultaneously consider the stress interference among fractures and dynamic flow distribution among clusters to establish a set of control equations for multiple-fracture propagation within a stage，and the equations are solved by Picard iteration method. In the model the multiple-fracture propagation velocity is determined by the energy release rate. The stress interference and fracture width are calculated by displacement discontinuity method，and dynamic flow distribution among clusters are calculated according to Kirchhoff¢s second law. Based on the established model，an example of X201 well in Xinjiang is analyzed. The results show that when the cluster spacing is 20 m，interior clusters are severely restricted. Under the condition of four clusters fracturing，only increasing the internal clusters spacing has little influence on promoting multiple-fracture even propagation. Adjusting perforation friction can promote internal two clusters effective extension. Simultaneously adjusting the clusters spacing and perforation friction is more likely than only adjusting one to promote multiple-fracture uniform propagation.

Key words： rock mechanics horizontal well fracturing multi-cluster fracturing displacement discontinuity method stress interference

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	Articles by authors
	YANG Zhaozhong1
	YI Liangping1
	LI Xiaogang1
	LIU Changyin2

Cite this article:

YANG Zhaozhong1,YI Liangping1,LI Xiaogang1, et al. Study on multiple-fracture extension within a stage in horizontal well of tight reservoir[J]. , 2018, 37(S2): 3870-3878.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.0768 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS2/3870

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