Effective Stimulation of Carbonate Reservoirs around the World by Creating Multiple Drainage Holes

2008 ◽  
Author(s):  
Ricardo Salomao Aboud ◽  
Jose Daniel Diaz ◽  
Alfredo Mendez ◽  
Leonard John Kalfayan ◽  
Lance Nigel Portman ◽  
...  
Keyword(s):  
Carbonate Reservoirs ◽  
The World ◽  
Stimulation Of

Effective Stimulation of Carbonate Reservoirs around the World by Creating Multiple Drainage Holes

2008 ◽  
Author(s):  
Ricardo Salomao Aboud ◽  
Jose Daniel Diaz ◽  
Alfredo Mendez ◽  
Leonard John Kalfayan ◽  
Lance Nigel Portman ◽  
...  
Keyword(s):  
Carbonate Reservoirs ◽  
The World ◽  
Stimulation Of

Effective Stimulation of Carbonate Reservoirs around the World by Creating Multiple Drainage Holes

2008 ◽  
Author(s):  
R.S. Aboud ◽  
J.D. Diaz ◽  
A. Mendez ◽  
L.J. Kalfayan ◽  
L.N. Portman ◽  
...  
Keyword(s):  
Carbonate Reservoirs ◽  
The World ◽  
Stimulation Of

Effective Stimulation of Very Thick, Layered Carbonate Reservoirs Without the Use of Mechanical Isolation

2009 ◽  
Author(s):  
Chris E. Shuchart ◽  
Shalawn Jackson ◽  
Janette Mendez-Santiago ◽  
Nancy Hyangsil Choi ◽  
John K. Montgomery ◽  
...  
Keyword(s):  
Carbonate Reservoirs ◽  
Mechanical Isolation ◽  
Stimulation Of

The New Flow Control Devices Autonomously Controlling the Performance of Matrix Acid Stimulation Operations in Carbonate Reservoirs

2021 ◽  
Author(s):  
Mojtaba Moradi ◽  
Michael R Konopczynski
Keyword(s):  
Flow Control ◽  
Dynamic Change ◽  
Injection Rate ◽  
Control Flow ◽  
Carbonate Reservoir ◽  
Operating Conditions ◽  
Carbonate Reservoirs ◽  
High Permeability ◽  
The Impact ◽  
Stimulation Of

Abstract Matrix acidizing is a common but complex stimulation treatment that could significantly improve production/injection rate, particularly in carbonate reservoirs. However, the desired improvement in all zones of the well by such operation may not be achieved due to existing and/or developing reservoir heterogeneity. This paper describes how a new flow control device (FCD) previously used to control water injection in long horizontal wells can also be used to improve the conformance of acid stimulation in carbonate reservoirs. Acid stimulation of a carbonate reservoir is a positive feedback process. Acid preferentially takes the least resistant path, an area with higher permeability or low skin. Once acid reacts with the formation, the injectivity in that zone increases, resulting in further preferential injection in the stimulated zone. Over-treating a high permeability zone results in poor distribution of acid to low permeability zones. Mechanical, chemical or foam diversions have been used to improve stimulation conformance along the wellbore, however, they may fail in carbonate reservoirs with natural fractures where fracture injectivity dominates the stimulation process. A new FCD has been developed to autonomously control flow and provide mechanical diversion during matrix stimulation. Once a predefined upper limit flowrate is reached at a zone, the valve autonomously closes. This eliminates the impact of thief zone on acid injection conformance and maintains a prescribed acid distribution. Like other FCDs, this device is installed in several compartments in the wells. The device has two operating conditions, one, as a passive outflow control valve, and two, as a barrier when the flow rate through the valve exceeds a designed limit, analogous to an electrical circuit breaker. Once a zone has been sufficiently stimulated by the acid and the injection rate in that zone exceeds the device trip point, the device in that zone closes and restricts further stimulation. Acid can then flow to and stimulate other zones This process can be repeated later in well life to re-stimulate zones. This performance enables the operators to minimise the impacts of high permeability zones on the acid conformance and to autonomously react to a dynamic change in reservoirs properties, specifically the growth of wormholes. The device can be installed as part of lower completions in both injection and production wells. It can be retrofitted in existing completions or be used in a retrievable completion. This technology allows repeat stimulation of carbonate reservoirs, providing mechanical diversion without the need for coiled tubing or other complex intervention. This paper will briefly present an overview of the device performance, flow loop testing and some results from numerical modelling. The paper also discusses the completion design workflow in carbonates reservoirs.

Foam Acid Treatment - The Key to Stimulation of Carbonate Reservoirs in Depleted Oil Fields of the Samara Region (Russian)

2017 ◽  
Author(s):  
Alexander Letichevskiy ◽  
Alexey Nikitin ◽  
Alexey Parfenov ◽  
Vitaliy Makarenko ◽  
Ilya Lavrov ◽  
...  
Keyword(s):  
Acid Treatment ◽  
Carbonate Reservoirs ◽  
Oil Fields ◽  
Stimulation Of

scholarly journals Performance of the national fencing team of Ukraine at the XXXII Olympic Games and the prospects of its performance at the next Olympic Games

2021 ◽  
pp. 84-87
Author(s):  
Olga Kuvaldina ◽  
Volodymyr Driukov
Keyword(s):  
Olympic Games ◽  
Crucial Importance ◽  
Team Members ◽  
National Team ◽  
Sports Events ◽  
The World ◽  
High Level ◽  
Sports Statistics ◽  
Stimulation Of ◽  
The Olympic Games

Analysis of Ukrainian athletes’ results at the XXXII Olympiad Games allows pointing out the factors of the weak performance of Ukrainian athletes in women's individual saber and epee competitions, as well as men's team epee competitions, despite the possibility of winning medals in these sports events according to many analysts including those of Infostrada Sports and other sports statistics experts. These, in our opinion, include an unsatisfactory level of efficiency of the process of reaching the peak of readiness for the Olympic Games; lack of psychological stability of athletes at the competitions; weak tactical preparation of some athletes. Based on the performances of athletes of the Ukrainian fencing team in Tokyo, a conclusion was made about the unsatisfactory level of athletes’ preparation for the XXXII Olympic Games. Only 20% of the national team members were able to realize their potential at the XXXII Olympic Games. The dynamics of the athletes’ results at the World Championships 2017 – 2019 indicates the need to use in the new Olympic cycle the planning, which is focused on our athletes reaching the peak of readiness for the Olympics: at first, the training should be aimed at the maximum stimulation of the growth of sportsmanship, whereas at the final stage it should be focused on its realization in the major competitions. It is shown that despite the unsuccessful performance of the Ukrainian fencing team in the Olympic Tokyo, this type of martial arts has significant potential for improving sports achievements at the XXXIII Olympic Games 2024 in Paris. It is noted that in the new Olympic cycle it is of crucial importance to identify candidates for the XXXIII Olympic Games as soon as possible and to create all the conditions for their full-fledged preparation. Thus, to ensure further winning medal places at the Olympic Games, it is necessary to improve the system of sports training in the Olympic cycle, which envisages participation in numerous competitions during the year to achieve a high level of readiness in the major competitions of triennial – the Olympic Games.

CLINICAL INVESTIGATION IN PEDIATRIC PRACTICE

PEDIATRICS ◽  
1956 ◽  
Vol 18 (1) ◽  
pp. 90-94
Author(s):  
John C. Wilcox
Keyword(s):  
Clinical Study ◽  
Teaching Hospital ◽  
Clinical Investigation ◽  
Medical Knowledge ◽  
Academic Standards ◽  
Pediatric Practice ◽  
The World ◽  
Common Purpose ◽  
The Common ◽  
Stimulation Of

WHILE recognizing that the common purpose of all clinical investigation is the benefit of the patient through the advancement of medical knowledge, there are other justifications and sources of inspiration which may be more immediately gained objectives. This is true whether the investigator is a professor of pediatrics or his country cousin. It is the purpose of this paper to compare the natures of those immediate objectives as they apply to clinical investigation carried on in a teaching center with clinical investigation performed in pediatric practice. In making this comparison, I do not intend to imply that the professor of pediatrics or a member of his staff has at his beck and call large crews of laboratory technicians, roomtuis of pretty secretaries and efficient stenographers, tabulators and computers in frightening array, scads of money neatly tagged for research and all the time in the world—and that none of these is possessed by the practitioner. Instead, I will point out that in spite of a seemingly vast gulf of separation in facilities and resources, there are similarities of purpose which serve to give reflected dignity to any reasonable and seriously pursued clinical study even though it be attempted under primitive conditions by academic standards. The professor, gazing from the porticoed façade of a teaching hospital and contemplating his next venture into publication [SEE FIG. 1., FIG. 2. IN SOURCE PDF] (Fig. 1), looks in 1 of 3 possible directions for stimulation. Each of these corresponds with 1 of 3 responsibilities: (1) instruction of students; (2) scientific stimulation of pediatric confreres; (3) the recognition of academic superiors.

Cannabinoids and cancer: potential for colorectal cancer therapy

2005 ◽  
Vol 33 (4) ◽  
pp. 712-714 ◽  
Author(s):  
H.A. Patsos ◽  
D.J. Hicks ◽  
A. Greenhough ◽  
A.C. Williams ◽  
C. Paraskeva
Keyword(s):  
Colorectal Cancer ◽  
Cell Growth ◽  
Cancer Therapy ◽  
Surgical Techniques ◽  
Chemotherapeutic Agents ◽  
Signalling Pathways ◽  
The World ◽  
Endogenous Cannabinoids ◽  
Tumour Cell Growth ◽  
Stimulation Of

Despite extensive research into the biology of CRC (colorectal cancer), and recent advances in surgical techniques and chemotherapy, CRC continues to be a major cause of death throughout the world. Therefore it is important to develop novel chemopreventive/chemotherapeutic agents for CRC. Cannabinoids are a class of compounds that are currently used in the treatment of chemotherapy-induced nausea and vomiting, and in the stimulation of appetite. However, there is accumulating evidence that they could also be useful for the inhibition of tumour cell growth by modulating key survival signalling pathways. The chemotherapeutic potential for plant-derived and endogenous cannabinoids in CRC therapy is reviewed.

scholarly journals Vaccines and Antibodies: Weapons in the Fight Against Ebola Virus

2021 ◽  
Vol 9 ◽  
Author(s):  
Patrice Debré ◽  
Marie Neunez ◽  
Michel Goldman
Keyword(s):  
Infectious Disease ◽  
Immune System ◽  
Infectious Diseases ◽  
Human Body ◽  
Ebola Virus ◽  
Virus Disease ◽  
Ebola Virus Disease ◽  
World Today ◽  
The World ◽  
Stimulation Of

Ebola virus disease is one of the deadliest infections in the world today. The microbe to blame is the Ebola virus. It has already caused numerous outbreaks in Africa, in the regions located south of the Sahara. This article describes the main characteristics of this infectious disease as well as the currently available treatments, namely vaccines and antibodies. Antibodies are produced by the human body when it is infected by a microbe. Antibodies can be collected from the blood of infected humans or animals and purified or manufactured in a laboratory to produce drugs. While vaccines have demonstrated their effectiveness in preventing infectious diseases, antibodies are effective in stopping the progression of several infectious diseases. In this article, you will discover that the stimulation of the immune system, either by the vaccine or by antibodies, is essential to tackle Ebola virus disease.

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