Meet a Business Object

1
Meet a Business Object

• By Clay Harter - Chevron petroleum Technology
  Company (on loan to Prismtech)andIneke
  Reijsmeijer - Shell International Exploration and
  Production

2
Outline

• Business Objects Are .
• Things Familiar to End-Users
• Software Components
• Defined by their Interface
• Business Objects Encapsulate Data
• WellBore/Well Pick Example
• Business Objects Provide Services
• Earth Model Intersector Example
• Business Object FrameWork
• OpenSpirit Example

3
Business Objects Represent Things Familiar to
End-Users in the Subject Domain

• Data
• Well, Well Bore, Horizon, Fault, Drill String,
  RFT, .
• Process
• Time-depth conversion, intersection, production
  allocation rule, .
• Presentation
• Map viewer, section viewer, bar chart, table,
  list view, 3D viewer, .

4
Business Objects are Software Components

• Implemented in a computer language
• Reusable in different applications
• Business objects may be distributed (e.g.
  accessible across a network or across processes)

5
Business Objects are Defined by Their Interfaces

• A BO interface is a contract with a user of the
  BO to provide some data or service
• Interfaces are defined in IDL (Interface
  Definition Language)
• The same Interface may have multiple
  implementations (e.g. different vendors,
  different languages, different implementation
  characteristics) but all are interchangeable
• DCOM (Microsoft) and CORBA (OMG) are most common
  distributed object mechanisms and have their own
  IDLs

6
Business Objects Encapsulate Data

• Allows access to read and write data without
  concern as to physical location or format issues
• Only data that is of direct interest to
  applications is exposed

7
Application Examples Using Business Objects that
Encapsulate Data
Business Objects Encapsulating OpenWorks and
GeoFrame Well Data Gocad using OpenSpirit
Well/WellBore Business Objects Gocad using
OpenSpirit WellPick Business Objects
1
2
8
Behind the Scenes - IDL Snippet
WellPick Business Object

• interface WellPick
• EpiTypesDataQuantity getDepth() raises
  (EpEntityPSException)
•  
• void setDepth(in EpiTypesDataQuantity depth)
• raises (EpEntityReadOnlyException,
  EpEntityValidationException)
•  
• string getPickName() raises (EpEntityPSExcept
  ion)
•  
• void setPickName(in string pickName)
• raises (EpEntityReadOnlyException,
  EpEntityValidationException)
• .. much omitted ..
• // end interface Pick

9
Behind the Scenes Sequence Diagram
User
Session Event
WellPick
WellPick
Object Selector
Gocad
Service
(GeoFrame)
(OpenWorks)
1 select well picks
2 object selection event
3 object selection event
4 getPickName, getDepth
Display WellPick
5 getPickName, getDepth
6 edit well pick
Display WellPick
7 setDepth
8 object update event
9 object update event
10 getDepth
Redisplay WellPick
10
Business Objects Provide Services

• Business Objects can provide a variety of
  services
• Business logic
• Algorithmic/computational
• Visualization

11
Application Example Using Business Objects that
Offers a Service
Business Object Offering an EarthModel
Intersection Service Gocad as an EarthModel
Intersector
12
Business Object Framework

• A coherent set of business objects and related
  object services to provide a set of building
  blocks for application development and deployment
• Defined design patterns for usage and extension
  of framework
• e.g. how to find objects, create new objects,
  etc..
• Allows developers to be very productive and
  presents a degree of consistency and ease of use
  for end-user

13
Interoperability Framework

• Developed by PrismTech with sponsorship from
  OpenSpirit Alliance Shell, Chevron, Elf,
  StatOil, British Gas, CGG, Shared Earth,
  GeoQuest, IFP, )
• An interoperability framework with primary focus
  on Data Business Objects

14
FrameWork Modules
2D Viewers
Earth Model Services
3D Viewers
Signal Processing/ Statistics
Service Modules
Data Modules
Sub-Surface
Drilling
Production

• Object Services (Trader, Naming, Notification, )
• Units and Coordinate Conversions)
• Project and Session Objects

COM Option
Base Framework
15
Sub-Surface Business Objects
V1 (in 2nd beta)
V2 (mid development ship Q2 00)

• Well
• Well Bore
• Well Pick
• Well Log
• Well Velocity
• 3D Seismic
• 2D Seismic
• Earth Model
• Horizon
• Fault

• Well
• Well Bore
• Well Pick
• Well Log
• Well Velocity
• 3D Seismic

16
Summary

• Business objects relate to real world things
  they are understandable to end-users
• They offer a convenience for both developers and
  end-users
• Business objects can encapsulate data and expose
  common services