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Considering current Energy crisis in Pakistan and with many of the easily accessible reserves exploited,Pakistan’s O&G industry today has no choice,but to explore new and ever more challenging frontiers with respect to exploration,production,drilling and security perspectives.At the same time,there is a pressing need to maximize the already discovered production potential in mature fields.Production from these fields has played a major role in meeting the Pakistan’s energy needs,and today holds the potential to further bridge the supply gap.However,years of producing oil and gas has subsequently drawn down the reservoir pressure of these mature fields.Consequently,many of these structures are severely depleted – in some instances the depletion is so severe that continued development is economically unfeasible.Many of these fields’ still hold abundant hydrocarbons,but the eventual production of these trapped reserves require infill drilling or workover to adequately exploit the field.In others,drilling deeper for new production is necessary,and combined with the ability to preserve the present zone for continued production,can improve field economics.When depletion draws down the pore pressure in what is typically a sand of other porous and permeable zone it becomes vulnerable to invasion from fluids used in drilling,workover,and/or completion.This paper will review challenges that our industry encounters and the common practices that are used to address them.This paper will compare and distinguish how these same circumstances can be addressed much more efficiently with engineering evaluation processes,applying the new technologies available globally which will not only help us to maximize drilling performance but will reduce impacts on Reservoir Damage and Productivity decline.