Schlumberger Technology Corporation

Stephen J Kimminau

John R Lovell

Rogerio Tadeu Ramos

Kashif Rashid

George Albert Brown

Mohammed Rupawalla

Cyril Lagrange

David Michael Hargreaves

A system and method are provided for detecting fluid invasion of an annular space in a pipe structure. The system includes a thermal element and a temperature sensing element placed in the vicinity of each other in the annular space of the pipe structure. A thermal signal is generated by the thermal element. The temperature sensing element is connected to a monitor that monitors and processes the thermal signal. As the thermal signal changes when conducted through different types of fluids, the invasion of an annular space by seawater that normally contains oil or gas may be reliably detected.

Method and system for detection of fluid invasion in an annular space of flexible pipe

A method is disclosed of characterizing a well using a series of measurements taken along the sandface of that well in order to optimize a well model. The method may comprise providing a well model with a plurality of adjustable physical parameters, providing a data set made up of a plurality of sandface measurements, and running the well model with different combinations of adjustable physical parameters so that the results of the well model substantially match the results of the sandface measurements. In one embodiment, the method may comprise creating a communication pathway between the surface and the sandface including an inductive coupler. A further step may include pre-processing the plurality of the sandface measurements. In addition, a further step may be to establish or set at least one control device in order to change the flow characteristics of the production fluid in the well.

Combining reservoir modeling with downhole sensors and inductive coupling

One aspect of the invention relates to a method () for characterizing a well () using distributed temperature sensor (DTS) data to optimise a well model (). The method comprises providing a well model of flow and thermal properties () of the well (), where the well model () has a plurality of adjustable physical parameters, providing a data set made up of a plurality of DTS temperature profiles of the well () taken at different times during operation of the well (), and running the well model () with different combinations of the plurality of adjustable physical parameters to match to the plurality of DTS temperature profiles. The DTS temperature profiles may also be pre-processed to make them consistent with one another.

Well characterisation method

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Sudbury, United Kingdom

Stephen J Kimminau