Theoretical Analysis of Proppant Embedment and Fracture Conductivity in Fractured Reservoir
Open Access
- 1 February 2021
- journal article
- research article
- Published by IOP Publishing in IOP Conference Series: Earth and Environmental Science
- Vol. 651 (3), 032077
- https://doi.org/10.1088/1755-1315/651/3/032077
Abstract
Proppant embedment mainly accounts for diminishing fracture aperture and conductivity. The conductivity decrease could greatly restrict fluid flow, thereby affecting the well performance. In this paper, new mathematical models are derived to calculate the proppant embedment and fracture conductivity after hydraulic fracturing. These models take three crucial factors into consideration, including proppant instantaneous elastic deformation, the conductivity change over time, and effective fracture geometry and corresponding proppants amount. Fitting correction is performed for the new theoretical model based on the experimental data. The results show that the theoretical model proposed matches well with the experimental data. The fracture conductivity is in proportion to proppant viscosity, elastic modulus of proppant and in inverse proportion to closure pressure, while elastic modulus of rock and large value of formation rock viscosity have slight impact on fracture conductivity. Moreover, with the increase of proppant viscosity, it takes longer for the conductivity to come to the steady state. These new mathematical models can provide some insights for proppant size selection and sand ratio optimization of fracturing treatment, and it is also a good method to predict the proppant embedment and the fracture conductivity.Keywords
This publication has 17 references indexed in Scilit:
- Experimental Method to Simulate Coal Fines Migration and Coal Fines Aggregation Prevention in the Hydraulic FractureTransport in Porous Media, 2013
- Experimental evaluation of fracture stabilizersPetroleum Exploration and Development, 2013
- Conductivity of narrow fractures filled with a proppant monolayerJournal of Petroleum Science and Engineering, 2012
- Optimization of proppant size for frac pack completion using a new equipmentJournal of Petroleum Science and Engineering, 2012
- Evaluation of ultra-light-weight proppants for shale fracturingJournal of Petroleum Science and Engineering, 2012
- Mechanics of light weight proppants: A discrete approachComposites Science and Technology, 2012
- The effect of proppant embedment upon the long-term conductivity of fracturesJournal of Petroleum Science and Engineering, 2007
- A Geometry Model for Tortuosity of Flow Path in Porous MediaChinese Physics Letters, 2004
- Fracture Width and Embedment Testing in Soft Reservoir SandstoneSPE Drilling & Completion, 1998
- Fracture Conductivity Comparison of Ceramic ProppantsSociety of Petroleum Engineers Journal, 1985