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Society of Petroleum Engineers - SPE Middle East Health, Safety, Security, and Environment Conf. and Exhibition 2012, MEHSSE - Sustaining World Energy Through an Integrated HSSE and Business Approach | Year: 2012

The purpose of this paper is to provide the best practice to prevent injuries and fatalities during drills and maintenance for totally enclosed motor propelled survival craft (TEMPSC) on any normally manned Fixed offshore installations, Mobile Offshore Drilling Rigs, jack-up barges and floating barges/ heavy lift vessels to ensure safe evacuation of personnel to safe place where they can be recovered. Lifeboats have been involved in a number of serious/fatal incidents during maintenance operations and drills (e.g. Offshore Drilling Rig AD22 in 2009) when the boat has inadvertently fallen into the sea. The outcomes of worldwide Survey investigated the root causes of most lifeboats incidents in the last 15 years, Root causes have been categorized as follow: • Unsafe practices during lifeboat drills and inspections; • Communication failures; • Inadequate maintenance of lifeboats, davits and launching equipment; • Inadequate training for personnel maintaining/operating the lifeboat. • Lack of familiarity with lifeboats, davits, equipment and associated controls; • Failure of on-load release mechanism; • Inadvertent operation of on-load release mechanism;and • Design faults other than on-load release mechanisms. [2] The survey highlited that unsafe drills by manned launching and recovery of lifeboats and poor maintenance have been played the significant root causes in the high number of incidents and consequences. Totally enclosed motor propelled survival craft (TEMPSC) should be considered to be a safety-critical element, Therefore Performance Standards should be established and a Written Scheme of Verification prepared to demonstrate their integrity. Performance standards should be expressed in qualitative and quantitative terms against the fundamental parameters of Functionality, Reliability/Availability, and Survivability and should be measurable & auditable. Eliminating the associated root causes of fatal Lifeboats accidents during launching and recovery of lifeboats for the purpose of drills/preventive planned maintenance program is the way forward by Making Lifeboat Drills Safer. Copyright 2012, Society of Petroleum Engineers. Source

Society of Petroleum Engineers - SPE Middle East Health, Safety, Security, and Environment Conf. and Exhibition 2012, MEHSSE - Sustaining World Energy Through an Integrated HSSE and Business Approach | Year: 2012

To maintain oil production at sustainable rates through minimizing the production loss factors, there was a need to investigate the feasibility of conducting SIMOPS on old wood, unprepared & un-equipped, high producing oil Well Head Towers (WHT). For this purpose, Management has formed a multi-disciplined team to investigate the possibility of allowing oil production & water injection operations while carrying out drilling/workover activity in a similar manner to that adopted for ZADCO oil WHTs. While SIMOPS has never been implemented on ADMA-OPCO WHTs for oil production, it was noted that water injection SIMOPS was already under implementation. The methodology adopted by the taskforce is as follows : (i) re-visiting the risk assessment which constituted the basis for the current SIMOPS by ZADCO through ADMA-OPCO. (ii) Categorising & identifying the WHTs where SIMOPS can be implemented based on considerable incremental oil production level. (iii) Site verification of SIMOPS by ZADCO. (iv) Reviewing & amending the current SIMOPS procedures with the purpose of producing special procedure for ADMA-OPCO oil WHTs. Site verification visits to rigs carrying out SIMOPS were made where open discussions with rig personnel were held and equipment / systems were checked and tested. It was noted during the function test of the deluge system that the water supply by the injection facilities/ system on the WHTs is satisfactory where as the back up water supply from the rig was ineffective. The risk assessment has shown that most hazards are assessed at ALARP or acceptable level except for the following: • Rig Collapse : Mitigation of the hazard is through the major improvements in NDC Systems (Management, Maintenance). • Dropped Objects : Mitigation through re-enforced Impact Protection on top of production facilities. • High Pressure Testing : Shut down production and depressurisation of service pipe works will constitute appropriate protection. The current SIMOPS procedures maintained in ADMA-OPCO's were reviewed and amended to reflect the required modification to allow for SIMOPS on ADMA-OPCO Towers. The SIMOPS procedure will require formal approval of Site Operating Authorities (Umm Al Shaif (US), Zakum (ZK)), both Asset Managers & the Drilling Manager. Copyright 2012, Society of Petroleum Engineers. Source

Al Mutwali O.,ADMA OPCO
2nd EAGE Workshop on Geosteering and Well Placement: Geosteering and the Benefits it Brings to Subsurface Understanding | Year: 2013

Prior to the global oilfield boom and its effect on technological development, wellbores were restricted to simple vertical drilling and basic wireline logging. However, technological developments in line with increased global energy demand, has resulted in commercially viable development efforts for previously untapped unconventional reservoirs. The challenges associated with unlocking the potential of these highly heterogeneous and thin reservoirs has encouraged a fresh approach for reservoir development and management strategy, including increased utilization of deviated and horizontal well drilling in order to maximize reservoir exposure, hence flow area for hydrocarbons. This brought on the introduction of steerable and logging while drilling systems, consequently the industry began its step change in its outlook towards drilling and logging operations. Source

Belhaj H.,The Petroleum Institute | Abukhalifeh H.,The Petroleum Institute | Javid K.,ADMA OPCO
Journal of Petroleum Science and Engineering | Year: 2013

Carbon dioxide miscible injection is one of the non-thermal effective enhanced oil recovery (EOR) methods. In the Middle East, particularly Abu Dhabi, pilot testing is already implemented in the Rumaitha Field for CO2 miscible injection. This paper investigates the means of improving CO2 miscible injection by enriching it with N2 and HC gases. The emphasis is on identifying CO2 solvent mixtures with reduced MMP to achieve miscibility at reasonable injection pressures in Abu Dhabi fields. The minimum miscibility pressure (MMP) of targeted oils from Abu Dhabi carbonate reservoirs with mixtures of N2, CH4, C2H6, and HC rich gases of varying composition with CO2 injection gas are evaluated through simulation. The first contact miscibility (FCM) and the multiple contact miscibility (MCM) of injected gases/oil mixture under reservoir temperature have been determined using WINPROP module of the Computer Modeling Group (CMG) simulator. In addition, the corresponding oil recovery factors for various N2/CO2 content displacements were calculated by 1-D compositional simulation of slim tube using BUILDER and GEM module of CMG Simulator. Results show that miscibility is predicted to occur with multiple contact miscibility (MCM): vaporization and/or condensation mechanisms. The increase of C2H6 concentration in the CO2 injected gas reduced MMPs for targeted Oil 1 by 100psi/10mol%. However, N2, CH4 and HC rich gas increments in CO2 injected gas increased the MMPs for targeted Oil 1. MMP was observed to be 2300psi for pure ethane with Oil 1. In addition, MMPs for targeted oils with N2/C2H6 and N2/CH4 injected gas mixtures are assessed. This study can open possibilities for future enriching of CO2 and N2 miscible injection to improve miscibility and recovery of oil. © 2013 Elsevier B.V. Source

Society of Petroleum Engineers - 14th Abu Dhabi International Petroleum Exhibition and Conference 2010, ADIPEC 2010 | Year: 2010

ADMA-OPCO Engineering Division has recently innovated a Subsea Cooling Scheme capable of rapidly cooling down the temperature of operating fluids even in high flow gas pipelines. The scheme can be inherent into the original pipeline design without adding any additional costs resulting in the elimination/ reduction of various major risks whenever temperature is a main contributor. The higher the temperature, the higher are the cost savings and risk eliminations/ reductions. ADMA-OPCO has already applied the scheme into the detailed design of one of its major gas projects resulting in extensive savings in addition to other numerous benefits relevant to risk reduction and operations. The subject paper describes the challenging process of identifying all risks associated with the first application of its kind. Not less challenging was the technical management of those identified risks to acceptable levels. In addition to above, the paper describes the concept of subsea cooling and what are the associated extensive benefits to the pipeline system design and operations. Moreover, how to technically adopt such scheme to various needs utilizing the knowledge captured from the pilot application in ADMA-OPCO Project. The paper also briefly describes typical constraints which would limit the application of such a scheme. Finally, the paper highlights potential future developments relevant to the concept/ scheme and what is deemed required for widening its applicability. Copyright 2010, Society of Petroleum Engineers. Source

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