10^th Asia Pacific Congress on Oil and Gas December 03-04, 2018 Bangkok, Thailand

David Jaramillo holds a Master in Naval Architecture from the University of Hamburg. He hasrnmore than 25 years experience in the maritime and offshore sector, He also holds an MBA in Sustainabilty Management from the University of Lüneburg. After more than 17 years at GErmanrnclassification society Germanischer Lloyd Mr. Jaramillo works since 2013 for the German chain manufaturer RUD Ketten, as Manager Business Development for the Offshore and Maritime sector.

The daily tasks in the Oil & Gas offshore construction industry include the safe and reliable lifting and lowering of loads, as well as their movement and precise positioning - even in adverse underwater conditions. Controlling these operations using remotely operated vehicles (ROVs) with gripping devices at depths of up to several thousand meters, places the highest demands on people and material. These specific demands became in the past increasingly apparent through the loss or damage of valuable equipment by the accidental opening of hooks, as documented i.e. in several IMCA papers and incident reports. In addition to entangling or snagging risks, the operation that requires both ROV arms to control and manipulate the loads was cumbersome and time consuming. Ultimately, compromising safety and leading to high and avoidable costs. The present work describes the development of a novel approach, which has been initiated by RUD in cooperation with Subsea 7 resulting in a product that meets both the operational safety and speed of use requirements that are currently missing from the industry. This innovative hook features an unconventionally outwards opening safety latch and is operated by pressing a trigger or pulling on a lanyard for operational flexibility. The safety latch closes and most importantly, locks automatically, when releasing the triggering mechanism. This important innovation promises to set the standard for the next generation of ROV friendly subsea hooks in terms of safety, ease of use and reliability.

I Muhammad Irfan have recently completed my Bachelors in Petroleum and gas Engineering from University of engineering and technology, Lahore, Pakistan. I have scored good grades in my Engineering.I am a executive member of Society of Petroleum Engineers,Lahore Student Chapter (SPELSC,UET Lahore). I have done internship in Oil and gas developement Pakistan I have keen interest and passion to work in Petroleum industry and to preent my knowledge at different forums.

Material Balance and Decline curve analysis are the oldest and the most common mathematical approaches for estimation of reserves. Pitfalls are associated with these techniques that leads to their continuous modifications. Still both their theory and practice continue to suffer widespread mis-understanding and lackluster implementation. DCA is not just a curve fitting exercise and should not be limited to isolated rate time graph with sloppy defaults of most graphing programs. A practitioner should adept at creating different graphs and examined them in parallel. Arp’s method should be used along with type curves that combine MBE with inflow performance relationship for a better evaluation. The conventional material balance (P/Z plots) for gas reservoirs require shutting-in the wells and measuring pressures at different points of time in the life of a reservoir. Material balance calculations can be performed without shutting-in the well, \r\nthis method is known as flowing material balance (FMB). This method is proven to be a sound technique but limited to constant flow rate. Unfortunately, most wells do not flow at constant rate for extended periods of production. Dynamic material balance is the extension of FMB. It is applicable to variable flow rate. Non-linear behavior of gases is incorporated by using pseudo functions. Three different case studies can be used to evaluate different MBE and DCA techniques. A constant BHFP production history for a dry gas reservoir can be utilized to compare Conventional DCA and Decline Type Curves. A constant rate production history for a dry gas reservoir to compare Flowing Material Balance (FMB) and Static MB techniques. Finally, a variable rate variable pressure production history for a dry gas reservoir can be used to compare Dynamic MB and Rate Normalized MB techniques.