- Isan PP
- Malu PP and
- Tapa PP
Ariosh managed the associated staff and client company interface. Subsequently, Ariosh trained her client’s engineering contractor how to use the Laser scan data as a virtual platform and eliminated site visits. The as-built drawings Ariosh generated for the three production platforms are currently being used for detailed engineering work.
Three Idoho Satellites As-Built Implementation Project
The Three Idoho satellite as-built implementation project was being executed under the Field-Wide As-Built to generate As-built drawings for all MPN production facilities. Ariosh performed 3D Laser scanning on the 3 satellite platforms to provide 3D laser As-built documentation to capture dimensional information of existing facilities and create 2D & 3D deliverables. Engineering information that laser scanning could not capture were obtained by disciplined engineers. Laser scanning was done entirely by Ariosh’s indigenous staff, data processing and drawing generation was done completely by our Nigerian nationals. We generated complete, accurate and statistically viable 3D laser models for the satellite platforms using Nigerian engineers in our Lagos office. We also generated PDMS model for one of the platforms on the request of our client. The over two hundred 2D integrity critical drawings we generated from the laser scan data are currently being used by our client.
EGP 3A Brownfield Offshore 3D Laser Scanning Survey Project and EGP 3A Design Verification Project
Challenge
Nigeria's natural gas resources are in excess of the nation’s proven crude oil reserve. Over 63% of the gas produced during the production of crude oil is currently being flared. In order to diversify its revenue base and reduce the huge wastage of valuable resources as well as the degradation of the environment as a result of flaring, the Nigerian Government, through the NNPC, is vigorously pursuing a number of natural gas utilization projects with its joint venture partners whereby associated gas would be harnessed to achieve these objectives.
The overall project work scope involved modification and tie-ins to Delta South PP and Okan GGCP to support two new platforms; Meji GGCP (Gas Gathering and Compression Platform) and Okan NWP (Non Associated Gas Wellhead Platform) and gather associated Gas from Delta South PP.
Piping and structural design were done in Bentley AutoPlant by a third party design firm. As-built drawings were not available or not accurate for a complete and clash free piping and structural design. Hence the design done had interferences and dimensional fit-up problems. The effects of this are numerous hot works, construction rework, and bump in schedule and an increase in project expenses.
Solution
Ariosh was contacted for re-engineering and provision of a clash and interferences free design.
Ariosh conducted 3D Laser Scanning Survey on Okan GGCP and Delta South PP. and generated 3D Model of the Okan and Delta South facilities in Prism software. Ariosh clashed the newly designed AutoPlant models with the actual as-built 3D Model in Prism to identify the clashes. Ariosh then delivered screen captures of each of the interferences found and copies of the clash report that were generated from Prism 3D. Ariosh subsequently reviewed the clashes with the client company and recommended prioritized clashes for resolution. Resolutions were done in Bentley AutoPlant and faulty construction ISOs were repaired. Ariosh later modified the detailed engineering design in Bentley AutoPlant. The project team derived immense value from the deliverables generated from this project. The goals were achieved and even greater benefits can be realized from the delivery of a turn-key solution which entails the commencement of a similar project by first conducting a 3D laser survey of the facility and then design the AutoCAD, Aveva PDMS or Integraph PDS models based on the As-built point cloud data.
Below is the design verification of a point along the pipeline on one of the EGP platforms
Idoho Complex As-Built Implementation Project
Challenge
Mobil Producing Nigeria Limited (MPN), executing the Idoho Complex As-built documentation Project in which MPN required detailed data acquisition of systems, structures and ancillary equipment on the Idoho wellhead, production, and quarter’s platforms. MPN requested Ariosh to provide As-built laser documentation to capture dimensional information of existing facilities and create 2-D drawing deliverables. Ariosh would be a sub-contractor to ILF. Furthermore, the laser data generated by Ariosh would then be supplemented by conventional engineering work processes to capture information typically not generated from laser data, such as equipment datasheets/specifications, Cause & Effect Matrix,
SAFE Chart, etc.
Solution
Based on the excellent performances in the execution of past MPN projects, MPN requested ILF Engineers to contract the as-built documentation and preparation of drawings (2-D and 3-D) of the Idoho complex to Ariosh Limited. Relying on the proven accuracy of the SceneModeler (laser camera), Ariosh collected field data which were converted to 3-D models using the Prism Software. The Actual positions and dimensions of structures and ancillary equipment on the well head were accurately determined. Using the 3-D model from the Prism software, 2-D drawings of the complex were generated using AutoCAD from which equipment datasheets/specifications, Cause & Effect Matrix and SAFE Chart were produced.
Chevron Intra Plant Pipeline Corridor As-built Project
Challenge
Chevron Nigeria Limited (CNL) and Nigeria National Petroleum Corporation (NNPC) are joint venture partners for the Intra-Plant Pipeline Corridor (IPC) project. The IPC project involved laying pipelines across the Escravos Terminal to the Escravos Gas Plant (EGP) for various services. The pipeline Services would transport produced water, potable water, sanitary wastewater and gas. The Intra-Plant Pipeline Corridor Project scope included installing pipeline from Escravos Dehydration Terminal to Escravos Gas Plant, a distance of about 10,000 linear feet.
Solution
Ariosh was contacted to carry out the as-built documentation of the pipeline corridor and to partner with Gulf-Interstate Engineering (GIE) to carry out the design of the pipeline. Due to the huge size of the job, Ariosh decided to execute the as-built documentation using two field crews composed of four personnel each. Ariosh team scanned the Escravos terminal from the Dehydration plant to the gas plant (a distance of about 10000 linear feet) in a total of twenty-six days. After carrying out QA/QC analysis on the scan data, Ariosh prepared the 3-D model of the proposed pipeline corridor using AutoCAD 2004. To check for clashes in the modeled corridor and the actual as-built condition, the modeled pipe corridor was imported into the PRISM 3-D software. The tie-in points that had clashes were modified using Bentley AutoPLANT and a new model was developed. The deliverables for the project included P&IDs and 3-D models that were generated with AutoCAD. The project achieved one of our aims of improving our indigenous engineers in the design of pipelines.
East Area Projects
Challenge
The East Area Projects were being executed by ExxonMobil to capture and process associated natural gas being flared. The overall project was being executed in a series of “Engineering Procurement and Construction” packages. Package 4, or EPC4, included scope associated with modifications to existing platforms. Detailed engineering for EPC4 was broken down into two packages, EPC4A and EPC4B. Willbros requested that Ariosh performs laser scanning of selected portions of four production platforms and scanning of the complete facility for ten well-head platforms as part of the EPC4A engineering phase. ExxonMobil also requested Ariosh to carry out Dimensional Control Services to generate more detailed information on the design and fabrication work done by Willbros. This was part of QA/QC requirements of ExxonMobil for the fabrication of spools before hydraulic pressure testing.
Solution
After carefully going through the job requirements, Ariosh decided to break the job down into two, namely:
As-Built Documentation and Dimension Analysis and Control
After reviewing the existing drawings and recent photographs of the platform to have some ideas about the actual site conditions Ariosh field crew mobilized to site to carry out the laser scanning. Relying on the proven accuracy of the SceneModeler (Laser Camera), all the required as-built documentation were generated from the 3-D models generated by the laser scanning with no further visits to the platforms. Ariosh provided 3-D Laser Scanning Service and Modeling for the EPC4A platform The Dimension Analysis was carried out as part of the Quality Assurance and Quality Control (QA/QC).Ariosh executed this project with a 3-man crew using an Electronic Distance Measurement (EDM) machine to determine the precise dimensions of each spool. Survey targets were shot and then developed on a designed spreadsheet created to calculate the exact geometry of these spools. Ariosh was then required to generate PDMS Models for the ten wellheads platform for subsequent designs which were ongoing.
Etim Imin Utue (EIU) SHE Upgrade As-Built Project
Challenge
ExxonMobil was carrying out upgrade and maintenance projects for the various facilities on Etim, Inim and Utue (EIU) production platforms. ExxonMobil also desired to improve schedule and cost-effectiveness associated with upcoming inspections and modifications of the EIU Production Platforms. However, current-existing conditions documentation was lacking and may not reflect actual field conditions. The expectation was that design quality for the planned revamp projects would be at grassroots levels.
Solution
ExxonMobil selected Ariosh and Quantapoint to record complete accurate status of existing EIU facilities in highly accurate 3D models for the FEED phase of the EIU-SHE Upgrade Project. After going through the existing drawings and recent photographs of the platforms to have some ideas about the actual site conditions, Ariosh field crew mobilized to site to carry out the laser scanning. The team scanned all three EIU production platforms in a total of 13 working days. Relying on the proven accuracy of the SceneModeler (Laser Camera), All the required as-built documentation were generated from the 3-D models generated by the laser scanning with no further visits to the platforms. ExxonMobil used EIU 3-D models to facilitate detailed engineering design, constructability reviews, interference checks and tie-in point location. This solution is most successful because Quantapoint 3-D Prism Software provides fully digital and digestible engineering for streamlining constructability reviews.
ExxonMobil was able to quickly generate engineering design drawings such as equipment arrangements, elevation plans, piping isometrics, and P&IDs with cutting edge precision and a minimum of personnel on board time. Significantly, the EIU Laser scanning data is expected to continue delivering benefits during the detailed engineering and the construction phases of planned projects.
Asabo As-built 3D Laser Documentation and Modeling Project
Challenge
Mobil Producing Nigeria (MPN) was modifying its ASABO Platform complex to support both safety initiatives and a portfolio of production improvement initiatives for a mature offshore oil field in Nigeria. The project involved extensive modifications to an existing wellhead, injection and production platform. Deliverables, in addition to a 3-D model for each platform, included 2D drawings for the various components of each platform. Each platform lacked accurate existing condition documentation. Furthermore, due to limited space in the living quarters, the number of people and time spent on each platform had to be minimized. MPN’s goal was to generate accurate existing conditions documentation in a manner that promoted safety yet significantly reduced the amount of time spent on each platform collecting the data.
Solution
Quantapoint and Ariosh were selected to perform laser scanning to generate the 3-D models.
Our 3-D data was used to generate 2-D drawings and deliverables. After going through the available drawings, Ariosh team of engineers mobilized to the platform to carry out the laser survey. The cellar, deck, main and top decks of each platform was scanned. The scanning of each platform lasted for about three days. Due to the capability of the camera to scan relatively hidden areas, the collection of the field data was done with no scaffolding or lift access. This also reduced the number of personnel required on the field to two. After scanning the platforms and performing QA/QC analysis on the obtained 3-D laser data, about two hundred drawings (2-D and 3-D) were then prepared from the laser data. The drawings produced included P&IDs, Piping Isometrics, Equipment Arrangements, Framing Plans, Piping Plans, Elevations and Miscellaneous Sections and Details.
Since the SceneModeler (Laser Scanning Camera) has the capability of producing 3-D models that are dimensionally accurate to within 1/8 inch (3mm), the drawings were generated relying solely on the laser-scanned data with no additional field trips to verify field conditions.
Hardware and Software procurement of 15 Productivity units Laptops for EAP project team
Ariosh provided fifteen Dell latitude D620 laptops with the following configuration;
Front End Engineering Support for MPN Facilities Department
The expatriate’s responsibilities included:
Structural Engineering Consultant - Analyzed Etim LB Platform structure for possible addition of up to six well conductors using Engineering Dynamics, Inc. SACS to model structure, with additional conductor cases and applicable environmental loads that have helped the company to plan future development work. Reviewed and modified deck accommodation concepts to provide a feasible means to include new conductors while maintaining much of the original design loading capacity.
Structural Engineering Consultant - Evaluated Usari “B” and “C” platform structures for conductor slot optimization and for the addition of conductors. The slot optimizations involve using larger diameter conductors and modifications to conductor support framing. Conductor additions require project team concurrence and involve optimized placement (using AutoCAD), deck additions and platform structural assessments. For both the slot optimizations and the conductor additions performed structural checks of the conductors considering Metocean data and axial loading and support conditions. Employed SACS to perform structure evaluations and EXCEL to perform manual calculations and to communicate design and layout concepts.
Structural engineering Consultant - Reviewed offshore platform and heliport structural assessments and provided appropriate recommendations for structural surveys and reinforcement work, incorporating skills and experience in modeling and analyzing structures using SACS.
|
|
