| Title | Permeability Mapping |
|---|---|
| Authors | Maxwell WILMARTH and Lutfhie AZWAR |
| Year | 2015 |
| Conference | World Geothermal Congress |
| Keywords | Injectivity Index, II, Productivity Index, PI, field, reservoir, boundary, permeability, feedzone |
| Abstract | This paper introduces a permeability parameter called the Total Initial Injectivity Index Linear Density Average (TIIILDA, pronounced “tilde”) defined as the initial total well II as measured during a stage test or completion test divided by the length of open wellbore in km (t/h/bar/km), the natural units of which is time. Mighty River Power’s four operating geothermal reservoirs typically have values corresponding to an outer boundary of ~1 microsecond (µs), an injection area of 5 to 10 µs. This metric can aid targeting of injection wells in all geothermal fields as well as production wells in mainly single-phase, compressed-liquid reservoirs like Ngatamariki. It also allows for simple identification of field geometry and boundaries using an objective measure. |