Proppant Migration Law in Fractures of Conglomerate Reservoirs of Wuerhe Formation in Mahu Sag

doi:10.7657/XJPG20210507

Abstract

Abstract:

Fractures induced by volume fracturing stimulation to tight conglomerate reservoirs of the Wuerhe formation in Mahu sag are very complex, so that the migration and distribution laws of proppants are not clear, which seriously influences the fracturing effect. Based on 3D reconstruction of fracture shapes and considering the interaction between proppants and rough fracture surface, the influences of gravel size, gravel concentration and width attenuation of the fractures around gravels on proppant migration and distribution were investigated by using a Fluent two-phase flowing model. The results show that gravel size has obvious impacts on proppant migration, and it is negatively correlated to balanced height of proppant bank and positively correlated to balanced time of proppant bank; gravel concentration has weak impacts on proppant migration, and it is negatively correlated to balanced time and balanced height of proppant bank; width attenuation of the fractures around gravels has great influences on proppant migration, and both balanced time and balanced height of proppant bank decrease with the increase of the fracture width attenuation degree around gravels.

Key words: Junggar basin, Mahu sag, Wuerhe formation, conglomerate, tight reservoir, hydraulic fractuing, tortuous fracture, proppant migration

CLC Number:

TE357.12

CHEN Chaofeng, WANG Jia, YU Tianxi, LI Yi, ZOU Yushi, MA Xinfang, LIU Li. Proppant Migration Law in Fractures of Conglomerate Reservoirs of Wuerhe Formation in Mahu Sag[J]. Xinjiang Petroleum Geology, 2021, 42(5): 559-564.

Figures/Tables 8

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