Downhole Mass Flow Rate Measurements Enhance the Analysis of Well Test Data: A Field Example (original) (raw)

Downhole measurements during drillstem tests (DSTs) typically lack crucial data like sandface flow rate and fluid density due to instrumentation limitations. This paper introduces a DST dataset that includes continuous downhole density and mass flow rate measurements using a prototype fullbore multiphase flowmeter. These additional measurements enhance the interpretation of well test data, facilitate monitoring of well cleanup, and allow for improved estimation of reservoir parameters such as permeability, skin, and flow barriers. A field example demonstrates how these measurements provide insights into subsurface phenomena like gas cap formation, leading to more accurate reservoir evaluation.