The Experts below are selected from a list of 144 Experts worldwide ranked by ideXlab platform
Nguyen Van Hung - One of the best experts on this subject based on the ideXlab platform.
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overview of geomechanics and its applications to petroleum industry a case study for minimum Overbalance Pressure calculation
2020Co-Authors: Nguyen Van HungAbstract:Geomechanics plays an essential role in drilling and production petroleum industry from beginning with pre-drill well planning and continuing with wellbore stability support while drilling and sand production management. This paper will cover an overview about geomechanics from its fundamental knowledge and geomechanical models to its applications in practical problems of oilfield operations such as wellbore instability, sand production. Additionally, a full review about input data and how to get them by measuring in laboratory and calibration with field measurement will be presented. The result shows that the Mohr – Coulomb criterion can be used for the wells with the borehole inclination from 0 to 60° in this study area.
Nguyen Van Hung - One of the best experts on this subject based on the ideXlab platform.
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Overview of Geomechanics and its applications to petroleum industry – a case study for minimum Overbalance Pressure calculation
CIGOS 2019 Innovation for Sustainable Infrastructure, 2020Co-Authors: Nguyen Van HungAbstract:Geomechanics plays an essential role in drilling and production petroleum industry from beginning with pre-drill well planning and continuing with wellbore stability support while drilling and sand production management. This paper will cover an overview about geomechanics from its fundamental knowledge and geomechanical models to its applications in practical problems of oilfield operations such as wellbore instability, sand production. Additionally, a full review about input data and how to get them by measuring in laboratory and calibration with field measurement will be presented. The result shows that the Mohr – Coulomb criterion can be used for the wells with the borehole inclination from 0 to 60° in this study area.
Gursat Altun - One of the best experts on this subject based on the ideXlab platform.
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Thermal effects on differential Pressure pipe sticking tendency
Journal of Petroleum Science and Engineering, 2016Co-Authors: Ali Ettehadi, Gursat AltunAbstract:Abstract Differential Pressure pipe sticking as one of the common borehole instability mechanisms occurs when the Overbalance Pressure pushing drill string toward filter cake. The aim of this study is to experimentally investigate possibility of "stuck pipe" tendency taking place during the utilization of two commonly in use drilling fluids (Bentonite/Polymer, and Lignosulfonate based drilling fluids) and a new developed drilling fluid system (Sepiolite based drilling fluid) at elevated temperatures. Drilling fluid samples were thermally aged for 16 h up to 204 °C (400 °F). Rheological and filtration properties of samples were then measured for initial confirmation. After that, the samples were subjected to the differential sticking test under differential Pressure of 3.447 MPa (500 psi). Sticking coefficients and corresponding sticking times were measured at various set times. Results indicated that Bentonite/Polymer and Lignosulfonate drilling fluids have lower sticking coefficients than those of sepiolite drilling fluids at temperatures below 121 °C (250 °F). However, the sepiolite drilling fluids demonstrated remarkable low sticking coefficients particularly above 149 °C (300 °F) implying low stuck pipe possibility due to the differential Pressure. This study could contribute on providing database regarding the differential Pressure pipe sticking tendency of various drilling fluids at elevated temperature.
Sordadang Sordadang - One of the best experts on this subject based on the ideXlab platform.
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PENANGGULANGAN PROBLEM PIPA TERJEPIT (PIPE STICKING) DI SUMUR „X‟ LAPANGAN „Y‟ PT MEDCO E&P INDONESIA
2012Co-Authors: Sordadang SordadangAbstract:Salah satu masalah dalam operasi pemboran adalah pipa terjepit (pipe sticking), akibat dari terjepitnya pipa ini adalah terhambatnya operasi pemboran dan meningkatnya biaya guna mengatasi pipa terjepit dan sewa rig yang harus ditanggung. Latar belakang penulisan ini adalah mencoba menganalisa mengenai penyebab terjadinya pipa terjepit dan upaya – upaya yang dilakukan untuk mengatasinya hingga mampu menangani problem pipa terjepit pada sumur X 1lapangan Y PT MEDCO ENERGI E&P INDONESIA trayek pemboran 8 / 2 “. Metodologi yang digunakan dalam tugas akhir ini adalah : pengumpulan data, identifikasi problem pipa terjepit, penanggulangan pipa terjepit. Berdasarkan identifikasi, maka dapat disimpulkan bahwa problem yang terjadi adalah pipe sticking, hal yang dapat diketahui adalah : 1). Perbedaan tekanan (Overbalance Pressure) sudah melebihi batas aman yang direkomendasikan antara 100 - 200 psi yaitu 302.67 psi. 2). Jenis batuan yang ditembus yaitu daerah porous dan permeable, yaitu ditandai dengan serpih (batu pasir) dan limestone (batu gamping). 3). Rangkaian pemboran seperti (Drill Collar dan HWDP) mempunyai ukuran diameter lebih besar akan bersandar dan menempel pada dinding lubang pemboran tepatnya dalam mudcake. Penanggulangan yang dilakukan untuk mengatasi pipa terjepit pada trayek 1pemboran 8 / 2 “ ini antara lain dengan upaya penentuan titik jepit dimana setelah melakukan pengukuran titik jepit terdapat dikedalaman 4992 ftTVD. Selanjutnya melakukan perendaman spotting fluids (EZ-Spott 40 bbl), dan melakukan tarik regang lepas (tarikan 240 klbs) yang mana cara tersebut efektif dan dapat membebaskan pipa yang terjepit. Kemudian dilanjutkan program selanjutnya yaitu melanjutkan pengeboran
Felipe Robles Lopes - One of the best experts on this subject based on the ideXlab platform.
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Experimental studies of formaion damage in porous medium
2017Co-Authors: Felipe Robles LopesAbstract:Resumo: A invasão de fluidos de perfuração e suas consequências na produção de petróleo são bem conhecidas e intensivamente discutidas por especialistas. Além disso, a comunidade científica tem buscado o entendimento dos mecanismos de invasão e do retorno de permeabilidade. Este estudo estende investigações anteriores sobre análise de dano e inclui as etapas de invasão de fluido de perfuração e de fluxo reverso de óleo. Foram realizados testes de invasão de fluidos base-água, soluções de goma xantana e de poliacrilamida, à pressão constante, em amostras saturadas com óleo e água conata. Usando um porta-testemunho especial, perfis de saturação e de pressão foram monitorados durante a invasão e o fluxo reverso, permitindo a observação das características do processo de invasão e de remoção do dano de forma dinâmica. A condição de saturação da amostra antes da invasão de polímero, óleo e água conata, permitiu melhorar a representatividade de um reservatório de petróleo. O monitoramento da pressão ao longo da direção de escoamento e varreduras de Raios-X combinados com o balanço de massa de fluidos injetados e produzidos permitiu observar o avanço do fluido invasor. Durante o fluxo reverso foi possível acompanhar dinamicamente a mudança de permeabilidade da região invadida. As principais contribuições deste estudo referem-se à análise do retorno de permeabilidade devido à produção de óleo em uma região danificada pela invasão do fluido de perfuração, bem como a influência da presença de água conata nestes processos.Abstract: Invasion of drilling fluids and their effects on oil production are well known and have been extensively discussed by experts. Furthermore, the scientific community has invested a lot of effort into understanding the mechanisms of invasion and permeability restoration. This study extends previous investigations and includes both invasion and back flow evaluation conditions. Test sample, initially at connate water condition, were submitted to constant Pressure displacement. Using a special core holder, saturation and Pressure profiles were monitored during Overbalance Pressure invasion and oil back flow. Monitored data has allowed observing the formation damage characteristics as well as cleaning dynamics. In this work, polymer injection into the sample at residual water saturation has improved the reservoir representation. The Pressures data, from the taps along the core, X-Ray data and also the mass balance allow the author to follow the invasive fluid going through the core. Additional insights about dynamic mechanisms were also discussed based on a large quantity of monitored data. During the back flow was possible to dynamically monitor the change of permeability of the invaded region. The main contributions of this study are related to the analysis of the permeability restoration due to oil natural cleanup of the region damage by drill in fluid. The influence of connate water in this process was also importante
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Experimental studies of formaion damage in porous medium
Universidade Estadual de Campinas, 2012Co-Authors: Felipe Robles LopesAbstract:A invasão de fluidos de perfuração e suas consequências na produção de petróleo são bem conhecidas e intensivamente discutidas por especialistas. Além disso, a comunidade científica tem buscado o entendimento dos mecanismos de invasão e do retorno de permeabilidade. Este estudo estende investigações anteriores sobre análise de dano e inclui as etapas de invasão de fluido de perfuração e de fluxo reverso de óleo. Foram realizados testes de invasão de fluidos base-água, soluções de goma xantana e de poliacrilamida, à pressão constante, em amostras saturadas com óleo e água conata. Usando um porta-testemunho especial, perfis de saturação e de pressão foram monitorados durante a invasão e o fluxo reverso, permitindo a observação das características do processo de invasão e de remoção do dano de forma dinâmica. A condição de saturação da amostra antes da invasão de polímero, óleo e água conata, permitiu melhorar a representatividade de um reservatório de petróleo. O monitoramento da pressão ao longo da direção de escoamento e varreduras de Raios-X combinados com o balanço de massa de fluidos injetados e produzidos permitiu observar o avanço do fluido invasor. Durante o fluxo reverso foi possível acompanhar dinamicamente a mudança de permeabilidade da região invadida. As principais contribuições deste estudo referem-se à análise do retorno de permeabilidade devido à produção de óleo em uma região danificada pela invasão do fluido de perfuração, bem como a influência da presença de água conata nestes processos.Invasion of drilling fluids and their effects on oil production are well known and have been extensively discussed by experts. Furthermore, the scientific community has invested a lot of effort into understanding the mechanisms of invasion and permeability restoration. This study extends previous investigations and includes both invasion and back flow evaluation conditions. Test sample, initially at connate water condition, were submitted to constant Pressure displacement. Using a special core holder, saturation and Pressure profiles were monitored during Overbalance Pressure invasion and oil back flow. Monitored data has allowed observing the formation damage characteristics as well as cleaning dynamics. In this work, polymer injection into the sample at residual water saturation has improved the reservoir representation. The Pressures data, from the taps along the core, X-Ray data and also the mass balance allow the author to follow the invasive fluid going through the core. Additional insights about dynamic mechanisms were also discussed based on a large quantity of monitored data. During the back flow was possible to dynamically monitor the change of permeability of the invaded region. The main contributions of this study are related to the analysis of the permeability restoration due to oil natural cleanup of the region damage by drill in fluid. The influence of connate water in this process was also importante
