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Managing your data with Landmark

Tuesday, November 22, 2011

Nailya Gusein-zade, managing consultant with data management at Landmark (Halliburton) in Baku, Azerbaijan, provides an overview of the different types of data which can be managed in Landmark's OpenWorks database



The OpenWorks project database is organized in the Oracle relational database and represents a set of more than 1,000 tables capable of storing more than 10,000 data elements, including various geological, geophysical, and petrophysical data, such as well information, log curves, faults, seismic navigation, production data and interpretation.



Well headers

The main data forms that categorize a well according to its type and locations include Well Header, Elevation, TD, Directional Survey, and Positional Log.

In an ideal situation, each well would possess a certain unique identification number within a company, corporation, or country. If such information is not present, then we should devise a rule for creating Unique Well Identifiers.

The following Well Header fields are especially important and demand attention: XY surface, XY borehole; Elevation and Elevation type; Total Depth; Current Well Status; CRS; Data Source; ;Remark


Stratigraphic data

OpenWorks database offers the capability for each interpreter to create his own stratigraphic column for well analysis.

Experience shows that this possibility generates a mass of well picks and stratigraphic formations. A detailed study of this mass found that several of the picks, in fact, have the same names, but different registers, syntax, and abbreviations were used in the naming, and, as a result, these picks do not match each other (e.g., Pick A, PickA, pick A, pick a, etc.).

The occurrence of such a name variety in identical picks is based on the fear of interpreters 'losing' and 'not recognizing' their own interpretation, which indicates insufficient understanding of the OpenWorks and StratWorks application capabilities.


Log curve data

For the unification of log-curve names, Landmark offers a list of more than 500 curve names by default, based on the Schlumberger curve names list.

Upon loading the log curve into an OpenWorks project, a curve, whose name is not described in the above-mentioned list, the Curve Loader utility offers two options-to pick a log curve name from the list of available names or to add a new name to this list.


Production data

The OpenWorks database enables the storing of oil, gas, condensate, water production, and injection data daily, monthly, and cumulatively, as well as perforation, completion, and treatment data. These data can be identified by wells, an oilfield facility, leases, or by fields. In my practice, production and injection data were assigned to wells, and OpenWorks database served as a database for DTVIP, GeoGraphix, and DSS applications.

The usability of such storage is obvious-the database reliably protects against losses; the data are periodically updated, and named applications easily import the necessary data to particular working projects. In classical applications, it is possible to build bubble maps in StratWorks on the basis of production and injection data and to visualize these diagrams in AssetView software.


Seismic data

The allocation of seismic and seismic interpretation data in OpenWorks database differs from other types of data allocations; for example, not all data relating to seismic are stored in an OpenWorks project database.

OpenWorks tables store 2-D lines navigation data, 3-D survey data, 2-D horizons, faults, horizon and seismic data catalogs, seismic, and horizon data-processing history, as well as information about the physical allocations of data, which are stored out of the Oracle database as flat files. The data stored in Oracle database include seismic data, 2-D and 3-D, and 3-D horizons.

Interpretation projects are based on the following primary data: seismic data 2-D and 3-D; navigation data; horizons; faults.


Web OpenWorks (WOW)

The Web OpenWorks (WOW) application allows access to data through the company intranet. It allows for the viewing and analyzing of data from all databases of such Landmark applications, including OpenWorks, SeisWorks, GeoProbe, Z-MAP Plus, ProMAX, CDA, VIP®, Asset Journal, as well as the third-party application, Geolog.


Fig. 10-Access to Z-MAP Plus data through the WOW interface. WOW interface easily solves many data management tasks and, among them, such tasks as joining data into one interface and even e-mailing to users the notifications about data updates.

When viewing the application data, the applications that created these data are not being used.

The WOW program also has the capability of providing QC data and comparison analysis across multiple projects, which is especially useful for data managers.


Corporate Data Archiver

Landmark offers users the Corporate Data Archiver (CDA) application, which only makes copies of the data on media for archiving.

The CDA application creates an organized archive of the data as well as information and data from a particular activity, such as a field study or prospect evaluation.

The CDA application organizes data into logical archives. For example, the archive can contain multiple geological and geophysical projects, Linux directories containing varied applications data, and documents from Microsoft Office from different shared folders. Thus, detailed 'snapshots' of projects are produced, which are always accessible online, even after the archive is transferred to external media, such as tapes or disks, and removed from the system. Snapshots contain such extensive data in the archive that there is no need for restoration just to see the data.


Asset Journal

Sooner or later, any group, department, or company as a whole will realize the need for the creation of an electronic library of the documentation on geo-researches. As a result, Landmark recommends the Asset Journal easy-to-use application for creating documents in HTML format. Asset Journal application edits and operates all types of information, including common files, screen captures, tables, audio files, and images.

Thus, Asset Journal application enables the creation of all possible documents and organizing them into libraries, including reports, procedures, atlases, presentations, notes, and notices. In addition, the ability to access Asset Journal projects through WOW software enables continuous access to company documents. Moreover, using this application while working on a project allows experts to prepare a report directly in an operating time.


PowerExplorer

If management needs to make an important decision regarding a particular lease and there is a deadline to find all information on this lease as well as its limits, say, a radius of 2-3 km. The problem becomes complicated when this information is contained in different company databases.

PowerExplorer database is ideal for these types of situations. This package allows you to carry out this type of search quickly. The selected information arrives in the project, bypassing the tiresome and dangerous stage of exporting data to external files. Thus, the dilemma of centralizing the different databases and granting a common interface for search and transfer of this data for future research is resolved by the PowerExplorer application.

The application is capable of integrating every possible geo-data store, including OpenWorks, SeisWorks, Z-MAP Plus, CDS, MDS, ArcGIS, GeoFrame projects.



Fig. 12-Window PowerExplorer application with data sample of the AOI. The Area of Interest Wizard allows users to easily create a geographical area with which they want to work and to operate them to add other sources of the data for display.



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