The Pressure Drop Analysis From Wellhead to Demister At PT. Geodipa Energy Unit Patuha
Henk Subekti (a*), Muhammad Ringga Dhani (a)

a) Oil and Gas Production Engineering, Polytechnic of Energy and Mineral Akamigas, Jl. Gajah Mada No. 38, Cepu, Blora, Central Java, 58315, Indonesia
*henk.subekti[at]esdm.go.id

Abstract

The pressure drop in the geothermal fluid conveyance from the production well to the geothermal power plant (PLTP) is a common issue in geothermal fields. Parameters that influence the pressure loss from the wellpad to the demister include friction, mass flow rate, inside diameter, vapor fraction, and pipe length. This study aims to determine the pressure drop values from the wellpad to the demister and compare the actual data with calculated data using the Darcy Weisbach correlation method. The pressure drop values obtained for well PPL 1-5 are 0.226 bara (actual) and 0.208 bara (simulation), while for well PPL 4-2, they are 0.306 bara and 0.321 bara (simulation). Error-values from calculations using the Darcy Weisbach correlation method are also determined. The error in pressure drop calculation for wells PPL 1-5 and PPL 4-2 is below 10%, which is considered valid. It can be hypothesized that factors such as pipe length, mass flow, inside diameter, pipe roughness, elevation, fluid viscosity, fittings, elbows, and flow regime contribute to the observed error. The pressure drop calculation also produces a turbine inlet power value, which becomes an indicator of the capacity produced by PLTP.

Keywords: Darcy Weisbach, Demister, Friction Factor, Pressure Drop

Topic: Engineering of Drilling, Production, and production surface and facility