Heat exchange efficiency between each region of the wellbore and formation systems is
influenced by the high thermal conductivity of the drill string and casing, which further affects …

Productions from oil and gas reservoirs can induce significant pressure and temperature
changes at the wellbore. The temperature signal is sensitive to reservoir properties and …

Trapped annular pressure caused by thermal-expand liquid greatly threatens well integrity,
so its mitigation is very necessary and essential. Nitrogen gas has been proved as an …

With the increasing development of smart well technology in the oil and gas industry, there is
a need for robust and reliable downhole power supply in order to provide stable power for …

The temperature difference between hot flowing production (including petroleum & natural
gas) and fluid in the sealed annuli leads to annular pressure buildup (APB). The pressure …

The significant pressure and temperature signals at wellbores associated with hydrocarbon
production can be very useful for reservoir characterization and production analysis …

Current analytical approaches for temperature transient analysis heavily rely on the
assumption of the constant rate production, which is often invalid for the extended period of …

Predicting the behavior of an underground reservoir requires precise reservoir properties
determination. One of the most effective tools for this purpose is well test analysis …

The significant temperature difference between the fractured and non-fractured regions
during the stimulation fluid flow-back period can be very useful for fracture diagnosis. The …

Thermal expansion induced by the temperature difference between the hot wellbore fluid
and the cold fluid in the trapped multi-annuli, severely threatens the casing safety and the …