ESTIMATION OF UNDEGROUND BLOWOUT MAGNITUDE USING TEMPERATURE LOGS

Tez Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Louisiana State University and Agricultural and Mechanical College, Engineering, Craft and Hawkins Department of Petroleum Engineering, Amerika Birleşik Devletleri

Tez Danışmanı: Dr. Zaki Bassiouni

Tezin Onay Tarihi: 1999

Tezin Dili: İngilizce

Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu

Desteklendiği Program: San-Tez Programı

Özet:

ABSTRACT
Underground blowouts present difficult challenges to successful well control. An
underground blowout should be diagnosed and quantified to the kill operation, but
diagnosis usually requires subsurface investigation with logs.
Temperature logs can be used to verify the existence of an underground blowout
and to identify the locations where inflow and outflow are occurring. They can also be
useful to estimate the magnitude of the flow. Quantitative relationships exist to predict
the temperature responses in producing or injection wells as a function of the flow rate,
but they are only valid for a flow time more than 10 days. This condition is not
necessarily fulfilled in the case of an underground blowout.
This study defines the method to estimate the underground blowout flow rate
using the fluid temperature profile for short and long flow time. The method depends on
the constant heat influx model. Heat transfer equations are written based on these
assumptions. The equations rely on the constant thermal properties of rock at the entry
depth where constant heat influx transfers to the earth from the well. Fluid thermal
properties vary depending on the gas composition, temperature and pressure at the
entry depth for different temperature logs. Therefore, flow rate for underground blowout
is estimated depending on the thermal properties, temperature, gas composition and
flow time.
Application of the developed method is illustrated on several hypothetical
examples and actual field situations.