Yenagoa

Collaborating Authors

All in One Concept With Expandable Tubular and Swellable Elastomer Technology: A Systems Approach to Well Design

Young, Ifeh Higson (Shell Petroleum Development Company of Nigeria) | Ekeigwe, Augustine Chukwudi (Shell Petroleum Development Company of Nigeria) | Alabi, Isaac Babatunde (Shell Petroleum Development Company of Nigeria) | Oluwatosin, Adedeji O. (Shell Petroleum Development Company of Nigeria) | Obanya, Nwabunor Phillip (Shell Petroleum Development Company of Nigeria)

OnePetroOctober, 2009

Abstract GU field high rate gas campaign was selected by management as a pace setter project to deliver NAG to the Nigerian LNG trains project as part of the overall strategy of implementing the revitalized performance improvement initiative in Nigeria. To deliver top quartile performance at lower unit technical cost without compromising on safety and sustainable community development, an innovative well design philosophy with game changer technology was proposed. The approach utilized a number of innovative techniques; slim well design with 2-casing string philosophy; 1-skin strategy and casing flow design. The 9 5/8" string acted both as the surface and production casing with the shoe above shallowest hydrocarbon. The build up, landing and drain section was drilled in a single trip through several unstable and reactive shale sections hence the "all-in-one approach". The 7" production liner was combined with 5 ½" expandable sand screen lower completion in a single trip. The 5 ½ Expandable Sand Screen was compliantly expanded to the 8 ½" drain hole. Unlike previous concepts where zonal isolation was provided with cement, zonal isolation was provided with swellable elastomers bonded and spaced out on the 7" production liner. GU-11ST well was successfully completed as a single string single gas producer with 7" 13 Cr completion tubing. The well tested to a facility-limited rate of 52 MMscf/d with FTHP of 3423 psig and condensate rate of 3900 bbl/d psi. Extrapolated well test results showed that the well can produce at 120 MMscf/d at a draw down of ca. 18psi; with extra swing capacity to go up to 160 MMscf/d when required. Several well testing challenges were addressed during the cleanup and flow period. The systems approach on well design in GU-11ST resulted in lower unit technical cost compared to other wells in the campaign. It has also proven to be a future enabler to implementation of the small location concept with light and less expensive rigs without compromising safety and well objectives. Background The GU field is a large, partially developed field situated in OML-28 in the seasonal fresh-water swamp area, some 110 Km west of Port Harcourt or 20 km North East of Yenagoa. The field was discovered with the drilling of GU-001 well in 1967 and is currently in the early appraisal/development stage. To date, eleven appraisal/development wells have been drilled. GU -02 and -11 were abandoned due to lack of completable interval. The eleven wells, (5 verticals and 5 horizontals), drilled so far in the field encountered a total of 23 hydrocarbon bearing horizons within a depth range of 7300 ftss to 15000 ftss. Of these, 2 are oil bearing, 4 are oil and gas bearing while the remaining 17 contain non-associated gas. SPDC's drive to increase and sustain production at reduced Unit Technical Cost favoured accelerated production achievable through the drilling of high-rate wells and delivery of a low cost initiative without comprising well integrity. As highlighted most of the well designs in the Niger Delta transverses depleted sands separated by highly stressed or faulted mud stones. In the GU field this has resulted in severe cost over run & in most cases a compromise in the well objective.

OnePetro

doi: 10.2118/124591-MS

SPE

SPE-124591-MS

SPE Annual Technical Conference and Exhibition

Country:

Africa > Nigeria > Rivers > Port Harcourt (0.25)
Africa > Nigeria > Niger Delta (0.25)
Africa > Nigeria > Bayelsa > Yenagoa (0.24)

Genre: Research Report > New Finding (0.34)

Industry:

Energy > Oil & Gas > Upstream (1.00)
Materials > Chemicals > Commodity Chemicals > Petrochemicals (0.78)

SPE Disciplines:

Well Drilling > Well Planning (1.00)
Well Drilling > Casing and Cementing > Casing design (1.00)
Well Completion > Well Integrity (1.00)
(6 more...)

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Strategic Framework: A Key To A Successful Comprehensive And Sustainable Response To HIV/AIDS Epidemic

Fakunle, Babatunde Adedayo (Shell, Nigeria) | Imam, Adamu (Family Health International)

OnePetroApril, 2008

Abstract HIV/AIDS continues to pose serious challenges to sustainable development, especially in developing nations and communities. The Bayelsa State of Nigeria is one state with an emerging HIV/AIDS epidemic. The Bayelsa State Action Committee on AIDS (BSACA) was the state body responsible for coordinating the response, however at the time of the study it had nor developed a strategic plan to address the epidemic. Against this background, the Shell Petroleum Development Company (SPDC) contracted Family Health International (FHI) to assist the State Government to develop a five year State Strategic Framework (SSF) for a comprehensive and sustainable response to the HIV/AIDS epidemic. Processes leading to the development included a desk review, formative assessment and training of stakeholders on technical strategies for an expanded comprehensive response (ECR). The SSF enabled the State to coordinate the use of resources and for every community to develop a strategic framework for a sustainable response to the HIV/AIDS epidemic. Introduction With a HIV/AIDS prevalence rate of 3.8 per cent in the 2005 Sentinel Survey report, Bayelsa State has an estimated 40,000 people living with HIV/AIDS. The State coordinating structure, the Bayelsa State Action Committee on AIDS (BSACA) has limited capacity to develop an SSF that will guide a coordinated resource mobilization and response to the HIV/AIDS epidemic. Only two health facilities carry out comprehensive antiretroviral therapy services, with limited number of staff who are also not well prepared to provide quality services according to national and international standards. In recognition of this, SPDC contracted FHI to render technical assistance to the State Government in the development of an SSF that will give strategic direction in resource mobilization and utilization to improve the delivery of quality comprehensive HIV/AIDS services to the general population in the State. Description and Application of Processes Three key processes that preceeded the development of an SSF for Bayelsa State were desk review, formative assessment and training of stakeholders on the technical strategies for an expanded comprehensive response (ECR). The methodologies involved a review of available documents on HIV/AIDS activities in Bayelsa State, with guided discussions with key stakeholders in the State. The desk review was immediately followed by a rapid formative assessment of the HIV/AIDS situation in the State. The rapid assessment was necessary to obtain required information relevant to specific target groups. The formative assessments took place in three Local Government Areas (LGAs) of the State: Yenagoa, Brass and Sagbama; representing the urban, peri-urban, and rural LGAs respectively. A combination of focus group discussions and in-depth interviews were conducted among six key target populations: in-school youth, female sex workers, low income women, transport workers and people living with HIV and AIDS (PLWHA). The rapid assessment aimed to determine the knowledge, attitude and behavior of these most at risk population (MARPs), regarding HIV and AIDS, including major risk factors and vulnerabilities. Information regarding health seeking behaviors was also gathered. Results gathered from these two assessments informed the training of stakeholders on the technical strategies for implementing an ECR in a resource constrained environment such as the Bayelsa State. Knowledge gained from this training increased the stakeholders capacity to fully participate and to make valuable contributions towards the development of the SSF.

OnePetro

doi: 10.2118/111820-MS

SPE

SPE-111820-MS

SPE International Conference on Health, Safety, and Environment in Oil and Gas Exploration and Production