Tuesday, March, 1999 - SKBB hotel, Kuala Beliat
"PERFORMANCE PREDICTION AND TESTING OF MULTILATERAL AND HORIZONTAL WELLS" by Leif Larsen from Statoil,
After a month from the previous presentation by Timothy Ong, SPE Brunei had organised another event on 9th. March 1999 at SKBB Plaza in Kuala Belait sponsered by Development function (BSP). The topic was on the Performance of Multilateral and Horizontal wells. The evening was attended by various professionals from various disciplines. The evening was kicked off by a speech from Development function manager, Martin Graham where he gave a brief introduction of the speaker for that night, Mr. Leif Larsen (refer to Biography below) followed by dinner.
Abstract from the Presentation
The choice of a multilateral well versus a horizontal well versus a vertical well is never made without proper pre-evaluation of costs, risks and benefits. "Proper pre-evaluation" depends on the case under consideration but should include the factors learned in previous "post-evaluation" of similar well cases. The best choice can be made through learning and technology transfer of all well-performance elements. The productivity index alone cannot judge a successfully drilling and completed well. Reservoir capabilities often determine a better than expected, or poorer than expected, well result.
All simple or complex wells destined to commingle production from multiple but isolated zones lead to accurate productivity potential, if key performance parameters of each zone are known. The difficulty arises in determination, of which parameters were not correct, if productivity is not met. With a properly designed test program, enough of the correct answers allow the right conclusions for future planning or immediate remedial actions.
The lecture addresses the problems and challenges of key performance parameter determination. It covers methods for performance prediction of complex wells with commingled production from isolated targets and of complex wells with production from a single drainage. Testing procedures and analyses techniques of pressure-transient data are included. The theory is illustrated with field examples and lessons learned from tailored tests.
Biography of Mr. Leif Larsen
Leif Larsen is a staff engineer in the Production Technology Department of Sterol, Stavanger, Norway. Mr. Larsen specializes in pressure-transient analysis and inflow performance prediction. Before joining Staroil in 1991, he spent ten years at Rogaland Research Institute. Concurrent with his industry work, he has been an Adjunct Professor at Stavanger College Centre.
Leif Larsen has authored numerous papers on analytical modelling of pressure-transient data from single and multiple layered reservoirs with regular and more complex boundary patterns. He has also presented papers on behaviour of multilateral, branced and multifractured deviated and horizontal wells. Larsen has served as Technical Editor and as a member of the Pressure Transient Testing Technical Committee. He holds B.A. and Ph.D. degrees in mathematics from University of California at Irvine before returning to Norway in 1975.
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In Bandar Seri Begawan, Negara Brunei Darussalam :
In Kuala Belait, Negara Brunei Darussalam :
SPE Brunei Homepage is on http://www.geocities.com/CollegePark/Library/4218 which is also linked to SPE International (http://www.spe.org).