Grouting program in the Mataloko geothermal field

Abstract

Grouting program was successfully made to protect a steam leak surrounding the well MT-1, in the Mataloko geothermal field, for a radius of 20m during a sudden blowout of the well MT-1. Due to the safety considerations, the well was killed and cemented to the top. Then the rig was disassembled and moved to the well MT-2, which was located 35 m northeast of the well MT-1. Considering the unstable ground surrounding the well MT-2, which was almost the same as the surroundings of the well MT-1, a grouting program was also performed surrounding the well MT-2 for a radius of 5 m to protect against leaking, before the rig up for the well MT-2. The grouting program in the Mataloko geothermal field was very successful in protecting the steam leak from surface fractures through which the blowout of the well MT-1 occurred. The grouting was to make a stable foundation surrounding the well MT-2. No steam leak occurred during the drilling of the well MT-2 until the well was shut-in for a long time.