G. Mckay et al., Harding a field case study: Sand control strategy for ultra high productivity and injectivity wells, J CAN PET T, 40(5), 2001, pp. 60-66
The Harding field is the first horizontal well development by BP and partne
rs in the highly unconsolidated Balder Massive Sandstone. The field develop
ment utilizes a TPG 500 Jack-up Drilling and Production Unit in conjunction
with a concrete Gravity Base Tank (GBT), providing oil storage of 500,000
bbls. A combination of the highly permeable, unconsolidated formation with
active water/gas drives and viscous oil creates a high coning potential. Th
is means that achieving and maintaining sand free production through optima
l completion design was critical to the overall success of the development.
The first phase of horizontal wells was drilled and completed for sand free
, ultra-high rate production, namely up to 30,000 BOPD per well with PIs in
excess of 1,000 bbl/day/psi. High rate water injectors are required for vo
idage replacement and pressure support. Initial injection water requirement
s were provided by two dedicated aquifer source wells.
This paper describes the strategy adopted and the factors considered in the
development of the sandface completion design for Phase 1 of field life. T
he experience gained on Phase 1 has contributed to the design enhancements
required for the more complex and challenging aspects of Phase ii, which wi
ll include extended reach horizontal wells to neighbouring satellite pools.
These enhancements have been engineered taking into account the variations
in reservoir quality, physical installation challenges, and production pro
file requirements, in order to achieve continuing longevity and the high we
ll PIs/IIs characteristic of the Harding Development.