Cemented and Cased Hole Multistage Stimulation Technology Development and Field Wide Implementation in a North Sea Chalk Oilfield

In a typical well completion system, retrievable plugs run on wireline are used to set production packers and thereafter, to perform leak testing of the upper completion tubing. There are significant costs and risks associated with these intervention operations to set and retrieve aforementioned plugs. This paper presents the development and implementation of a system using dissolvable technology that allows for interventionless packer-setting and tubing testing of upper completions. The solution developed is a packer-setting kit consisting of a seat profile and a dissolvable ball. The seat is run as part of the tubing string below the production packer. After landing the completion string, the dissolvable ball is dropped from surface to land on the seat profile below the packer. This ball-seat system holds pressure from above, thereby, enabling the production packer to be set and a leak testing of the tubing to be performed. Eventually, the ball dissolves completely in the presence of downhole packer fluids permitting start-up of production activities. This paper documents the extensive qualification test program which was undertaken to qualify a dissolvable ball-seat system for one-such application. These tests were aimed to verify the capability of the packer-setting kit to fulfil the operational requirements (pressure rating, dissolution time periods) under the specific downhole conditions (packer fluid type, temperature). Following successful qualification testing, this solution was successfully implemented in 3 wells on the Norwegian Continental Shelf in 2018. Adopting this technology significantly improved operational efficiency by reducing well completion and intervention times along with associated costs. Consequently, this enabled earlier production start-up on these wells. The most challenging aspect of this new approach is the selection and qualification of a suitable dissolvable ball material appropriate for the application-specific requirements and operational constraints. The various steps and tests necessary to verify suitability of dissolvable technology for such applications are outlined in this work. Key operational considerations which need to be kept in mind when implementing this solution shall also be addressed.

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Towards Achieving Indonesia's Oil Production Target of 1 MMBOPD by 2030: An Outlook from IATMI Norway

Fitnawan¹,

Harsum²,

Hasan³

et al. 2021

SPE/IATMI Asia Pacific Oil &Amp; Gas Conference and Exhibition

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Indonesia has become a net-oil importer since 2004 as the growing internal demand exceeds Indonesia's oil production. As many fields go into mature phase and combined with other challenges, the national oil production in the last decade has been decreasing from 945 MBOPD to 745 MBOPD with a decline rate of 3-5% per year. Thus, the contribution of the oil and gas sector to the state revenues has also shown a downward trend from 21% in 2010 to only 9.2% in 2019. However,oil production is still strategically importantfor the national economy. It is important for economic value creation, power generation, transportation, and industries as most of the archipelago's infrastructures are still based on fossil energy. If no effort is made to increase production, the country will be fullydependent on crude oil imports, which poses a threat to national energy security. It is thereforeinthe nation's great interest to enhance oil production, minimizing the deficit gapbetween export and import. Several key strategies may be considered to achieve this ambitious target. These strategies can be categorized into the following: 1) People and high performing organization; 2) Exploration, as critical factor for future production; 3) Improved oil recovery (including enhancedoil recovery) technologies, to grow production from the maturing fields; 4) Fast track and simplified project to develop small field discoveries; 5) Strong collaboration between government, industry, academia, and professional associations; and 6)Cost conscious culture. The derivatives of the above-mentioned strategies are among others: standardized resource data management, open source & digitalized geoscience data library, reimbursement system for exploration costs, near field/infrastructure exploration,new play concept, cluster license collaboration, infill wells campaign, multilateral wells, waterflooding, gas injection, stimulation and hydraulic fracturing campaign, well interventions, EOR screening, perfect-well optimization, standardize subsea and/or topside production system, digitalization, and attractive fiscal and regulation that encourages not only the ‘big operator’ to participate in the petroleum sector. The foundation of these strategies should be the legal certainty and effective & proactive bureaucracy. Above all, it is also important to emphasize the common ground of havingearly HSE involvement as part of the solution. In this paper, the authors would like to contribute in sharing the knowledge, technology and perspectives to all petroleum industry professionals in Indonesia based on the authors exposure in the Norwegian petroleum activities. The paper will also review the strategies, short term and long-term opportunities that may inspire Indonesian petroleum authorities and industry in transforming the ambition into action to achieve the national production target of 1 MMBOPD and 12 BCFD gas by 2030.

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Cemented and Cased Hole Multistage Stimulation Technology Development and Field Wide Implementation in a North Sea Chalk Oilfield

Cited by 6 publications

References 0 publications

Field Application of High-Temperature Dissolvable Bridge Plug in Shale Gas Horizontal Well

Field Application of High-Temperature Dissolvable Bridge Plug in Shale Gas Horizontal Well

Dissolvable Technology Enhances Operational Efficiency of Offshore Completion Operations on the NCS

Towards Achieving Indonesia's Oil Production Target of 1 MMBOPD by 2030: An Outlook from IATMI Norway

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