To maximize oil and gas production profitability, it is paramount to reach the whole reservoir and extract the hydrocarbon resources efficiently. In offshore environments well prospects are sited at fracture gradients and narrow pressure gradients. Thus in this type of environment drilling hazards are aplenty and this makes wellbore completion a tough challenge. If the wellbore is not completed properly then there can be an economic as well as environmental disaster. In such situations there often exists a drilling window between fracture pressure gradient and also pore pressure through which when drilling done yields out proper results. Thus this paper overviews the possibility of applying MPD technique in Well construction and completion in offshore conditions. The experimental as well as onsite usage of MPD technique has proved so far that this technique performs quicker and better than the conventional drilling technique which drills without any wellbore pressure management. Also the environmental hazards and risks related to conventional drilling usage in offshore hostile conditions are lowered through MPD. MPD can also reduce NPT as well as reduce drilling fluid loss which can in return lower the OPEX. MPD can also add value to production casings cementing operations in HPHT wells and also mitigate any further damage to wellbore.Here in this paper MPD techniques and its case studies of usage on various offshore fields of India are reviewed and then the unique challenges associated with application of MPD in offshore basins of India are highlighted. Also here a proper drilling program using MPD has been proposed for various petroliferous basins of India. Albeit few offshore basins of India which have established proven reserves, many are still loosely explored and thus with the information available a new proposal using MPD has been conceived here for basins which are petroliferous for further drilling activity in the proposed basin. This in return will add knowledge to the stakeholders, government and operators for future planning and development of field. An effective comparison between conventional and MPD technique has also been highlighted in this paper for regulators of hydrocarbon industry for basic understanding of MPD.

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Coiled tubing is used for a range of oil and gas well operations. It is mainly used in drilling, work over, pumping, logging etc. This technology is becoming an economic substitute to conventional drilling as it is highly cost and time saving. Drilling with Coiled tubing allows incessant supply of the pipe into the hole without constant interruptions, whether it can be as a drill string or tubing. Nowadays, most of the wells drilled are deviated because oil & gas reservoirs can be exploited more efficiently through extended horizontal wells. Also, Extended reach drilling make economic as well as environmental sense by reaching different pockets without drilling lots of wells. Through ERD we can also construct multiple wells to drain a large area from a single surface location. Moreover, the reserve situated in a populated area and geographically harsh area can be thoroughly exploited using high angle extended reach deviated and horizontal well. However in drilling high angle deviated and horizontal wells with coiled tubing, the motion of coiled tubing drilling is somehow restricted due to generation of high friction forces which lead to buckling inside the well. Another challenge using CTD for ERD is effective transport of drilled cuttings, as the complete string is in sliding mode while drilling. Apart from this there many challenges which drilling industry is facing in CTD usage with ERD. The main aim of this paper is to synchronize CTD usage with ERDs. Here we have presented the benefits & challenges of CTD-ERD system which can be used to save time and cost as well as proposing the possible current solutions. Knowing the limits and appropriate usage of coiled tubing in ERDs will save lot of costs and has potential to revolutionize the existing drilling activity of whole exploration, production and geothermal sectors.