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Productivity Model of Fractured Horizontal Wells in Shale Oil Reservoirs with Bedding Fractures Considered
CHEN Xi, LIU Ruining, XIE Bobo, PAN Yuting, HE Xiaodong
Xinjiang Oil & Gas
2022, 18 (1):
73-79.
DOI: 10.12388/j.issn.1673-2677.2022.01.012
Horizontal well fracturing is a key technolohy for the commercial exploitation of shale oil reservoirs，
and the productivity after fracturing has always been the study focus of many scholars. A traditional shale oil productivity model ignores the influence of bedding fractures formed during fracturing on productivity. In response to this problem，
the related theory of embedded discrete fracture model is introduced to establish a three-dimensional horizontal well productivity model for shale oil reservoirs with bedding fractures considered. The model is discretized based on finite-difference，
and the pressure distribution and typical productivity curves in reservoir matrix and fractures are obtained by MATLAB programming. The influence of permeability and fracture density on shale oil productivity is analyzed. Studies show that productivity increases with the increase in the permeabilities of bedding fractures，
and with the increase in the density of bedding fractures. When the permeability of bedding fractures is relatively high and developed，
great error will be resulted in if no bedding fractures are included in the productivity model. The model in this paper is of important practical significance for accurately predicting the productivity of shale oil reservoirs after fracturing.
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