TITLE:
Development of Film Forming Agent HN-1 and Its Application in Drilling Fluid
AUTHORS:
Youlin Hu
KEYWORDS:
Ultra-Low Permeable; Film Forming Agent; Drilling Fluid; Reservoir Protection
JOURNAL NAME:
Geomaterials,
Vol.3 No.4,
October
14,
2013
ABSTRACT: Borehole instability and reservoir damage had become the international technical problems of petroleum exploration and development of
complicated area, and the water of drilling fluid invading borehole wall and
petroleum reservoir was the main cause of borehole instability and reservoir
damage. In order to prevent the water of drilling fluid invading borehole
wall and petroleum reservoir, domestic and foreign scholars recently put
forward the technology of ultra-low permeable drilling fluid. Film forming
agent was the key treating agent of ultra-low permeable drilling fluid, the
film forming agent (HN-1) was developed, which did not affect properties of the
drilling fluid and could decrease the filter loss of drilling fluid applied in
Enping 24-2 oil field. Based on this research, ultra-low permeable drilling
fluid could be applied to Enping 24-2 oil field. By the methods of
testing ultra-low permeable drilling fluid properties, the drilling fluid
invasion sand-bed depth, drilling fluid high temperature/high pressure (HTHP)
sand-bed filter loss, the pressure-bearing ability of
rock core and the ability of reservoir protection were studied. By
synergistic effect, HN-1 containing the organic silicate and natural fiber
polymer modified by organic amine prevented the liquid and solids in drilling
fluid invading reservoir, decreased drilling fluid invasion sand-bed depth and
drilling fluid HTHP sand-bed filter loss, improved the pressure-bearing ability
of rock core and the ability of reservoir protection. The drilling fluid could
decrease reservoir damage to the maximal degree, and it offered efficiency
guarantee for exploitation Enping 24-2 oil field.