Analysis of Flow Data from Several Baca Wells

Abstract

Analyses are presented of the downhole pressure buildup data for wells located in the Redondo Creek area of the Baca Geothermal Field. The downhole drilling information and pressure/ temperature surveys are first interpreted to locate zones at which fluid enters the wellbore from the fractured formation and to estimate the initial reservoir temperature and pressure in these zones. Interpretation of the buildup data for each well considers wellbore effects, the CO2 content of the fluid and differentiates between the single-phase and two-phase portions of the data. Different straight-line approximations to the two portions of the data on the Horner plot for a flow test yield corresponding estimates for the single and two-phase mobilities. Estimates for the formation kh are made for the wells.