Application foam agent to foam cement slurry for geothermal well drilling

Abstract

One type of light weight cement is foam cement which can be used in cementing operations in weak zones with the possibility of small fractures and reducing the amount of light weigh cement suspension levels. The foam cement suspension can be used to solve lost circulation due to natural vertical fractures or cavernous formations. The purpose of this study was to determine the potential of foam cement slurry to solve the lost circulation in geothermal well. Making slurry cement uses class G cement at 200 mesh and 100 mesh size with the composition of cement. The cements put into the waring blender containing water stirit for 35 second, adding foam agent into cement slurry with variations in foam agent concentration of 0.03%, 0.06%, 0.09%, 0.12% and 0.15%. observations of foam cement above were carried out for 30 minutes to test the stability of bubbles in the mixture. The result this study showed different compressive strength values at variations the concentrations of foam agent. The strength value is strongly influenced by result of sample with 0.03% with Sika-aer concentration have a compressive strength value of 3745 psia, while sample with Sika-aer concentration of 0.15% have compressive strength value of 1701 psia. The value of compressive strength core foam cement can form a linear line according percentage foam agent concentrations. Foam agent between 0.03% - 0.15% with Sika-aer qualified the minimum requirements BHCT compressive strength according API-10B rules to reduce severity lost circulation in the well X-E2 in geothermal drilling well.