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Wireline Pressure Test Advances in Low Mobility Formations - Results from Recent TEPUK HPHT WellsNormal access

Authors: M. Dougherty and A. Hooker
Event name: First EAGE Workshop on Pore Pressure Prediction
Session: Poster Session 1C
Publication date: 19 March 2017
DOI: 10.3997/2214-4609.201700043
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 362.28Kb )
Price: € 20

Summary:
Advances in pressure testing technology and procedures were necessary in order to acquire pressure data over the low mobility Chalk Group for overburden studies within Total E&P UK. Extensive preparation, testing, and integrated planning between TEPUK and Baker Hughes was critical to achieving TEPUKs overburden data acquisition objectives. Development of new probe-based pressure testers has replaced the reliance of using Straddle Packer/inflatable-based tools for low mobility testing. The introduction of the FTeX tool (Formation Testing Explorer), with its very low tool storage volume and sophisticated electro-mechanical pump, has given TEPUK the ability to obtain pressures much faster and with significantly reduced risk. Accurate pore pressure data has been obtained with the Baker FTeX tool in extremely low mobility formations (0.001mD/cP). Pressures and samples were also obtained in <1mD/cP formations utilising the TEPUK-designed large-faced XXR probe. Significant rig-time saving and run cost savings utilising probe based tools for pressure testing and sampling in very low mobility formations. Acquisition of such critical data has allowed TEPUK to comprehensively model overburden pore pressure in the Elgin, Franklin and West Franklin Fields.


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