Revolutionary Terminal and Logistics Planning System (Shell)

ADGENT：expands use of simulation
ADGENT：uses the most up-to-date simulation technology, providing a user-friendly graphical interface and drag-and-drop functionality. It has the same look and feel as a standard Windows environment and will run on a PC with Windows or NT.

A basic model can be set up and running with just a few mouse clicks. The user simply drags element icons (such as tanks, jetties or well heads) onto the screen and builds up the system to be modeled. Each element has predefined properties such as capacity and pump rate. There is no need to do any programming.

ADGENT has both a Gantt and matrix style MYDP (Multi-Year Delivery Program) editor that allows users to edit the ship delivery program generated by ADGENT. Edits can be made to the ship arrival/departure dates at loading and receiving terminals, cargo sizes, the loading/receiving terminal the vessel should sail to next or any contingencies applied to voyages. If any edits break the model logic, such as trying to arrive at a port before it is feasible, users are automatically informed. This allows users to quickly and easily build complex delivery schedules.

The graphics and animation make models built in ADGENT very transparent. Users can observe the system as it runs, identifying any telltale signs of bottlenecks in the terminal or vessel queuing. Similarly, there are many pre-defined reports that enable users to diagnose any problems with the system. Reports can also be defined for any chosen element of the model; these can either be in the form of tables or dynamically updating graphs.

As with all complex systems, LNG systems have elements of uncertainty associated with them. Users can simulate this uncertainty in ADGENT by defining events such as breakdowns, maintenance, weather or tidal restrictions. Different speed strategies can also be defined for different ships.

ADGENT is a flexible and powerful tool that can be used for terminal studies, terminal operations, vessel logistics, supply and demand studies and even negotiations.

Results

How Shell International uses simulation
To date, ADGENT has been used to:

• keep the volume of existing LNG storage tanks to a minimum
• optimise the LNG ship capacity and speed requirements
• optimise the level of storage capacity needed to guarantee reliable delivery of LNG and eliminate bottlenecks in existing LNG plants.

The companies belonging to the Royal Dutch/Shell Group of companies are separate and distinct entities, but in this document the collective expression"Shell"is sometimes used for convenience in context where reference is made to companies of the Royal Dutch/Shell Group in general. Those expressions are used where no useful purpose is served by identifying the particular company or companies.

The information contained in this document is supplied only as a resource for your consideration and is not supplied with a recommendation that it can be used in any given situation, it is not a substitute for the user's own independent judgement. SSI Ltd. disclaims any and all liability arising directly or indirectly from the use of the information contained in this document.