The U.S. Department of Energy (DOE) supported the demonstration of a unique liquid-free hydraulic stimulation technology (CO2/Sand) in the water sensitive Devonian Shale's of eastern Kentucky in 1993. The initial production results from four wells which were stimulated with two-stage CO2/Sand stimulations indicated a significant advantage over N2 gas and N2 foam stimulations. The nine-month production responses from a 15 well (30 stages) study group were presented in SPE paper #29191 "Analysis of Production Response to CO2/Sand Fracturing: A Case Study" and reported a measured production benefit of CO2/Sand stimulations over N2 gas and N2 foam of 1.9 and 4.9 respectively.

This updated review includes: the 5-year production from those wells, the addition of three more single-stage CO2/Sand stimulation treatments, and the elimination of the early-time "flush" production from the analysis. The production responses for 21 wells (37 stages) is comprised of: CO2/Sand - 7 wells (11 stages), N2 gas - 9 wells (17 stages), and N2 foam - 5 wells (9 stages) are presented.

Keywords:
sand stimulation, spe 72383, proj, pike co, demonstration, mnthly prd x10cum, stimulation, proppant, upstream oil & gas, month month cum mmcf
Subjects:
Hydraulic Fracturing, Well & Reservoir Surveillance and Monitoring, Reservoir Characterization, Unconventional and Complex Reservoirs, Fracturing materials (fluids, proppant), Naturally-fractured reservoirs
Copyright 2001, Society of Petroleum Engineers
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