Identifier

etd-10242016-154015

Degree

Master of Science in Petroleum Engineering (MSPE)

Department

Petroleum Engineering

Document Type

Thesis

Abstract

Hydraulic fracturing is recognized as the primary technique to achieve economic oil and gas production from low permeability reservoirs like shale and tight-sand formations. One of the main challenges facing the oil and gas industry is maintaining the proppant functionality in the subsurface where replacement of proppant is only possible by expensive refracturing operations. Proppant crushing and proppant embedment have posed challenges for sustainable production from stimulated wells especially in soft and deep formations like Haynesville Shales. Experimental measurements show the strong impact of proppant stress and proppant embedment on reducing fracture conductivity. In this work, we introduce a new class of smart ”Expandable Proppants” (EP) to remotely control the expanding force and maintain the functionality of injected placed proppants. Our smart proppants are made out of thermoset shape memory polymers which are activated by formations in situ temperature to effectively maintain or even increase fractures width. A fully coupled CFD-DEM model is developed to study the effectiveness of expandable proppants and evaluate fracture conductivity enhancement via different combination and distribution of EP. In addition, a series of experiments were conducted in a modified API conductivity cell to measure the increase in fracture conductivity. Different conditions of temperature, confining stress, proppant size and concentrations are carried out to verify the optimum conditions.

Date

2016

Document Availability at the Time of Submission

Release the entire work immediately for access worldwide.

Committee Chair

Dahi, Arash

DOI

10.31390/gradschool_theses.4402

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