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Results
Formation Pressure While Drilling Technology Applied in Arctic Environment: Yamal Region Case Study
Ivashin, Maxim (Schlumberger) | Truba, Andrey (Schlumberger) | Zhernakov, Vladimir (Schlumberger) | Gluschenko, Mariya (Schlumberger) | Pavlov, Valeriy (Schlumberger) | Korelskiy, Evgeny (Schlumberger) | Weinheber, Peter (Schlumberger) | Yakovlev, Alexander (Schlumberger) | Makhmotov, Akikat (Schlumberger) | Zadvornov, Dmitriy (Schlumberger) | Kozlov, Vsevolod (JSC NOVATEK) | Glebov, Evgeniy (JSC NOVATEK) | Shokarev, Ivan (JSC NOVATEK) | Buldin, Albert (ZAO Investgeoservice) | Gulov, Artur (ZAO Investgeoservice) | Chimbulatov, Feliks (ZAO Investgeoservice)
Abstract Formation Pressure While Drilling tools were introduced to the industry several years ago (Pop, 2005). They have had widespread application and success especially in difficult offshore environemnts (Mishra, 2007) and very long horizontal sections (Larsen, 2008) but until recently they have been limited to high cost, deepwater environments. In many land environments Wireline Formation Tester (WFT) tools have often made more economic sense. In Russia FPWD tools have been run in the North Caspian and offshore Sakhalin both for drilling optimization (James, 2012) and for formation pressure guided well placement (Gupta, 2013) but had not ever been run on Land. In 2014, however a unique opportunity presented itself with very high angle wells drilled by Novatek in the field under Taz Bay. The wells being drilled had over 7000 m of vertical departure with deviation over 70 degrees. Additionally, since the field had been on production for some time, the wells were expected to encounter highly depleted sand layers. This implied highly unstable hole conditions and a significant risk of differential sticking. However, understanding the current reservoir pressure and therefore the amount of depletion was critical for managing the drilling hazards for this and future wells and for an accurate update of the hydrodynamic model. Given the risks associated with the hole instability a pipe-conveyed WFT was judged to be too risky and the FPWD tool was proposed. In this paper we will divide our presentation of this operation into three areas: conveyance and operational considerations, pretest design and execution and data analysis and integration
- Europe (0.49)
- Asia > Russia > Far Eastern Federal District > Sakhalin Oblast (0.25)
- North America > Canada > Newfoundland and Labrador > Newfoundland > North Atlantic Ocean > Atlantic Margin Basin > Grand Banks Basin > Jeanne d'Arc Basin > Hibernia Field > Hibernia Formation (0.99)
- North America > Canada > Newfoundland and Labrador > Newfoundland > North Atlantic Ocean > Atlantic Margin Basin > Grand Banks Basin > Jeanne d'Arc Basin > Hibernia Field > Avalon Formation (0.99)
Record Erd Senomanian wells on Yamal
Zadvornov, Dmitriy (Schlumberger) | Truba, Andrey | Petrakov, Yuriy | Sobolev, Alexey | Pavlov, Valeriy | Dymov, Sergey | Grachev, Oleg | Sosedkin, Dmitriy | Ivashin, Maxim | Gaynanov, Ilnur | Zhernakov, Vladimir | Glebov, Evgeniy | Shokarev, Ivan | Gulov, Artur | Zhludov, Alexey
Abstract The article is based on experience of drilling record Senomanian ERD wells on Yurkharovskoe field from the bank of the Tazovskaya Guba towards offshore. Core problem happening while drilling such extended wells is wellbore instability happening in mudstone intervals when drilling close to the bedding. This article is devoted to study of the specific breakout mechanism in mudstone at shallow depth and finding the solution for well trajectory optimization to prevent wellbore instability. The main problem was solved in the work is optimization of shallow Senomanian wells trajectories via geomechanical modeling coupling with drilling experience which allow to find the solution and solve the instability problems while drilling. Drilling experinse of Senomanian wells was analized and used for geomechanical model verification and chose the best wells trajectories. Feature of mudstone collapse while drilling close to bedding at shallow depth was investigated, also termal expansion effect and its inpact on wellbore instability was evaluated. The result of the work was trajectories optimization and succesfull drilling of Senomanian wells on Yurkharovsko? field. Drilled wells have record horizontal displasement from vertical among all wells on YaNAO. The aggregate results of engineering calculations and obtained experience of Senomanian wells drilling have perspective opportunities of design and construction of such wells in YaNAO.
- Asia > Russia > Ural Federal District > Yamalo-Nenets Autonomous Okrug > Gulf of Ob (0.35)
- Asia > Middle East > Qatar (0.28)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Mudrock (1.00)
- Geology > Geological Subdiscipline > Geomechanics (1.00)
- Asia > Russia > Ural Federal District > Yamalo-Nenets Autonomous Okrug > Gulf of Ob > West Siberian Basin > South Kara/Yamal Basin > Yurkharovskoye Field (0.99)
- Asia > Middle East > Qatar > Arabian Gulf > Rub' al Khali Basin > North Field (0.99)
- Asia > Middle East > Oman > Central Oman > South Oman Salt Basin > Nahr Umr Formation (0.99)
Yurkharovskoye Extended Reach Drilling Campaign Resulted in the Successful Completion of Record Multilateral Well
Glebov, Evgeny (Novatek) | Shokarev, Ivan (Novatek) | Gulov, Artur (Investgeoservice) | Zhludov, Alexey (Investgeoservice) | Dymov, Sergey (Schlumberger) | Dobrokhleb, Pavel (Schlumberger) | Kretsul, Vyacheslav (Schlumberger) | Zadvornov, Dmitry (Schlumberger) | Kondarev, Vitaly (Schlumberger) | Fedotov, Andrey (Schlumberger)
Abstract As part of the field development plan Novatek, Russia's largest independent natural gas producer, recently planned an extended reach drilling (ERD) campaign at the Yurkharovskoye field, in the northern part of Western Siberia, Russia. The focus of this campaign is the development of an offshore part of the field from onshore locations using ERD techniques and implementation of new systematic approach - specific combinations of the drilling technologies, engineering and organizational solutions. Developed a new drilling program based on engineered drilling system (EDS) approach. Geomechanical model was created to address main challenges related to wellbore stability. Key drilling and measurement technologies, including multipole sonic-while-drilling, high-speed telemetry, multifunction logging-while-drilling technologies in combination with rotary steerable technology, polycrystalline diamond compact bits and oil-based drilling fluid were used to deliver superior drilling performance and control drilling regimes in real time. Another specific of this project was multilateral completion at TAML (Technology Advancement for Multi-Laterals) level 3 junction and the deepest casing exit from 178-mm string alone with the first in mainland Russia run of LWD tools for the direct formation pressure measurement while drilling. Four extended reach wells were drilled in this Yurkharovskoye ERD campaign with outstanding results in performance. Use of most advanced and superior technologies allowed setting several records for entire mainland Russia and to successfully drill and complete the longest ERD and longest multilateral ERD wells. A new approach in interaction between all participants in the project and engineered technological solutions as part of integrated drilling system was successfully implemented on all wells acknowledging its effectiveness in improving project performance and elimination of undesired incidents. Geomechanical model updated in real time was crucial in defining safe operational drilling parameters and regimes, together with precise drilling-fluid management, enabled rapid response to actual well conditions (i.e., fracture gradients, wellbore stability, hole cleaning and high torque) while drilling. Use of special casing milling system allowed performing whipstock orienting and casing exit in one run with full-size window at high inclination and long departure from surface. Well construction and production objectives were successfully archived and led to changes to the field development plan including planning new ERD wells for shallower pay zones on the field. This paper will describe how multidisciplinary well design and construction team addressed drilling challenges in variety of extended reach horizontal wells in Yurkharovskoye oilfield. Achieved results of new approach for complex technical projects will be presented; lessons learned and plans for future field development will be described.
- Europe (1.00)
- Asia > Russia > Ural Federal District > Yamalo-Nenets Autonomous Okrug > Gulf of Ob (0.55)