summary key wordsfig.net/pub/fig2008/ppt/ts04f/ts04f_06_ajayi_owhojeta... · 2010. 11. 10. ·...

GPS DATA INTEGRATION INTO GIS FOR OFFSHORE FACILITIES MANAGEMENT –

CHEVRON NIGERIA EXPERIENCE

Emmanuel Olayinka AJAYI, Nigeria and

Sylvester Efe OWHOJETA, Nigeria

Key words: geo-information, geodetic services, GPS data integration, GIS technology adoption.

SUMMARY

The revolution of Geodetic information for operational and facilities management, and change in paradigm motivates GIS technology adoption by Chevron Nigeria. The production and management of geo-information, to cope with the increased demand for geodetic services within chevron naturally informed the need for modern methods of data capture.

When Chevron Nigeria was faced with problems of having different types of survey information, which were based on different reference datum. The Company decided to use GPS technology (LEICA GPS System 500 with SKI-Pro software) in 2002 to capture both spatial and attribute information of all offshore facilities (oil wells, jacket orientation, helicopter landing, etc.) in the Niger Delta area of Nigeria and exported data captured for use in ArcGIS.

Chevron Nigeria has found GPS to be a powerful, cost-effective data gathering tool. It is easily integrated into GIS and significantly improves the quality of information used in decision making. With update maps resulting from the integration of GPS and GIS, the company has benefited immensely from the combination of technologies which offer the potential of more and better spatial information for pipeline planning, decision making, and data management.

This presentation hereby highlighted the experience, the tasks, and moreover the challenges faced by Chevron Nigeria on the acquisition of GPS datasets for offshore facilities.

PROJECT STUDY AREA

1/4TS 4F - Hydrographic Information ManagementEmmanuel Olayinka Ajayi and Sylvester Efe OwhojetaGPS Data Integration into GIS For Offshore Facilities Management

WellWellTripod Tripod LegsLegs

HelideckHelideck((HelicopterHelicopterLanding)Landing)

StaircaseStaircase

RiserRiser

Spare Spare SlotsSlots

SurveySurvey PointPoint

Figure 2: An Offshore JacketFigure 1: An Offshore Production Platform

GPS PRE-PLANNING


Figure 4: Scanned Analogue Map Before Data Integration Into GIS

Figure 5: GPS Data Integrated Into GIS

SAMPLE GPS & EXISTING DATA SETS

299910.279

298892.487

298890.257

298891.677

297650.907

299910.433

299019.484

298976.228

297682.303

297400.493

MINNA_EAST

EXISTING _GRID RECORD

173411.850

174681.650

174681.954

174683.758

176971.161

173414.265

177256.437

176611.679

175808.675

178470.188

MINNA_NORTH

2.6361.798173414.486299912.0775 7 25.419998 E5 34 8.135087 NShut-InOilWell 1813-WH18DES10




2.2352.717176973.396297653.6245 6 12.143644 E5 36 4.091764 NIn UseOilWell 1409-WH14DES6




1.3631.595175810.038297683.8985 6 13.088448 E5 35 26.210782 NShut-InGasWell 1010-WH10DES2


MINNA_NORTHMINNA_EASTNorthing (M)Easting (M)Longitude (D M S)

Latitude(D M S)

StatusContentWellName

Point_IdFac_IDS/n

DIFFERENCES_IN CO-OD(∆ E ) (∆ N)

GPS_RESULT_GRIDGPS_RESULT_LAT/LONG

Figure 3: Table Showing GPS Result in Geographic and Grid Coordinates.


–– Sensitizing our customers toward adoption of new coordinate set Sensitizing our customers toward adoption of new coordinate set for for planning and design.planning and design.

–– Synchronization of all Spatial Database Engine (SDE) layer to thSynchronization of all Spatial Database Engine (SDE) layer to the new e new coordinate set.coordinate set.

–– Adoption of GPS in swamp and land locations (view blockageAdoption of GPS in swamp and land locations (view blockage--mangrove forest)mangrove forest)

–– Control extension to land locationsControl extension to land locations

–– Tracking and documenting changes resulting from data dynamicsTracking and documenting changes resulting from data dynamics

–– More economic and efficient data updating approachMore economic and efficient data updating approach

–– Opportunity for deformation studies of Chevron facilitiesOpportunity for deformation studies of Chevron facilities

–– SurveySurvey--aware features position updating in GIS (survey analyst Ext)aware features position updating in GIS (survey analyst Ext)

–– Provision of consistent data with known reliability in ArcIMS Provision of consistent data with known reliability in ArcIMS deploymentdeployment

– Geospatial data should be saved and stored so that it may be retrieved later.

– GPS positional data should be used to upgrade a less accurate GIS base map.

– All digital maps should have their associated metadata tagged tothem.

– By using accurate GPS points from a variety of projects can result in a digital base map that possesses a higher level of spatial accuracy in GIS environment.

– GPS data, combined with the field application of the conceptual work as presented in the study will generate more and better spatial information for offshore facilities planning, engineering, and research.

CONCLUSION CONCLUSION RECOMMENDATIONSRECOMMENDATIONS

BIOGRAPHICAL NOTESBIOGRAPHICAL NOTES

Surv. Emmanuel Olayinka Ajayi,Surv. Emmanuel Olayinka Ajayi, born in 1957 is a fellow of the born in 1957 is a fellow of the Nigeria Institution of Surveyors. Graduated in 1982 with a B.Sc Nigeria Institution of Surveyors. Graduated in 1982 with a B.Sc in in Surveying from University of Civil Engineering, Bucharest, RomanSurveying from University of Civil Engineering, Bucharest, Romania. ia. Obtained M.Sc degree in Surveying (with bias to Geodesy) from Obtained M.Sc degree in Surveying (with bias to Geodesy) from University of Lagos, Nigeria in 1988 and MBA degree in Project University of Lagos, Nigeria in 1988 and MBA degree in Project Management from Obafemi Awolowo University, IleManagement from Obafemi Awolowo University, Ile--Ife, Nigeria inIfe, Nigeria in2001. He was registered to practice as a Surveyor in Nigeria in2001. He was registered to practice as a Surveyor in Nigeria in 1989. 1989.

He joined Chevron Nigeria Limited in 1994 as a Survey Engineer iHe joined Chevron Nigeria Limited in 1994 as a Survey Engineer in the n the Facility Engineering Department and rose to the position of ChieFacility Engineering Department and rose to the position of Chief f Surveyor, GISSurveyor, GIS--Survey Unit, Chevron Nigeria Limited since May 1998. Survey Unit, Chevron Nigeria Limited since May 1998.

Surv. Sylvester Efe Owhojeta,Surv. Sylvester Efe Owhojeta, born in 1967 is a member of the born in 1967 is a member of the Nigerian Institution of Surveyors. Graduated in 1991 with a B.ScNigerian Institution of Surveyors. Graduated in 1991 with a B.Sc in in Surveying, Geodesy and Photogrammetry from University of NigeriaSurveying, Geodesy and Photogrammetry from University of Nigeria, , Nsukka, Nigeria. Obtained a Masters degree in Petroleum EconomicNsukka, Nigeria. Obtained a Masters degree in Petroleum Economics s from Ambrose Alli University, Ekpoma, Nigeria in 2005. He was from Ambrose Alli University, Ekpoma, Nigeria in 2005. He was registered to practice as a Surveyor in Nigeria in 2001. Up to dregistered to practice as a Surveyor in Nigeria in 2001. Up to date ate he has been practicing as a Registered Surveyor. Since July 2005he has been practicing as a Registered Surveyor. Since July 2005 on on contract engagement with the GIScontract engagement with the GIS--Survey Unit of Chevron Nigeria Survey Unit of Chevron Nigeria Limited, Escravos Limited, Escravos –– Nigeria. Nigeria.

CONTACTSCONTACTS

Surv. Emmanuel Olayinka Ajayi Surv. Emmanuel Olayinka Ajayi GISGIS--Survey Unit, Survey Unit, Chevron Nigeria Limited,Chevron Nigeria Limited,P.M.B 12825, Lagos State, NigeriaP.M.B 12825, Lagos State, NigeriaTel: +234Tel: +234--11--36737293673729Mobile: +234Mobile: +234--805805--588588--02650265Fax: +234Fax: +234--11--367367--47154715Email: [email protected]: [email protected]

Surv. Sylvester Efe OwhojetaSurv. Sylvester Efe OwhojetaGISGIS--Survey Unit,Survey Unit,Chevron Nigeria Limited,Chevron Nigeria Limited,P.M.B 12825, Lagos State, NigeriaP.M.B 12825, Lagos State, NigeriaTel: +234Tel: +234--11--36737233673723Mobile: +234Mobile: +234--805805--275275--6804; +2346804; +234--803803--721721--06310631Email: Email: [email protected]@chevron.com; [email protected]; [email protected]


summary key wordsfig.net/pub/fig2008/ppt/ts04f/ts04f_06_ajayi_owhojeta... · 2010. 11. 10. ·...

Documents