Prediction of porous rocks hydraulic fracturing when drilling a well
UDC: 622.248
DOI: 10.33285/0130-3872-2023-5(365)-20-24
Authors:
POPOV ANATOLIY N.
1,
ISMAKOV RUSTEM A.1,
POPOV MIKHAIL A.2
1 Ufa State Oil Technical University, Ufa, Russia
2 Gazprom Nedra, Moscow, Russia
Keywords: forecasting, rock, borehole wall, reservoir pressure, lateral pressure, hydraulic fracturing pressure, total porosity, fraction of rock skeleton, lateral expansion coefficient
Annotation:
The relevance of the study is caused by the problem of predicting the beginning of pressure loss as a result of reservoirs hydraulic fracturing while the field is being developed. Porous sedimentary rocks are two-component systems consisting of a solid skeleton and a pore space filled by the reservoir fluid. The pressure of the drilling fluid on the borehole wall is balanced by both the radial stresses in the rock matrix and the pressure of the fluid saturating the rock. The article, based on the published data on real tests, consider sand confirms the hypothesis of a significant effect of the rock total porosity on the hydraulic fracturing pressure. A formula for calculating hydraulic fracturing is proposed. In this case, the statistical characteristics of both the coefficient of lateral expansion and the fraction of the porous rock skeleton are taken into account.
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