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Wyświetlanie 1-15 z 85
Tytuł:
Technical and economic analysis of the impact of compressors installed at well clusters
Autorzy:
Foidas, I.
Stefanescu, D. P.
Powiązania:
https://bibliotekanauki.pl/articles/298607.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
dynamic pressures
suction pressures
group compressor
cash flow
Opis:
The current stage of mature gas fields exploitation is characterized by increasing the efforts for maintaining the wells in production, in order to maximize the gas recovery factor in conditions of economic profitability. In this respect, a permanent concern of the specialists in this domain is represented by the adjustment of the compression capacities with the dynamics of the energetic parameters of every well belonging to these fields. This assumes the compression units installing as close to the well head in order to decrease the dynamic pressure, allowing the gas ratę increasing. On the other hand, decreasing the dynamic pressure at the well head, results also in reducing the minimum gas rate necessary for removal the liquid accumulated at the wells bottom, avoiding thereby the risk of the wells flooding. The pilot project of installing the portable compressors at the level of some gas groups operated by Romgaz, was a real success, the future perspectives regarding the production enhancing and revenue growth, based on this technology, being certainly.
Źródło:
AGH Drilling, Oil, Gas; 2014, 31, 2; 263-270
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Natural gas companies trends and perspectives in production, storage and consumption of natural gas
Nowe trendy przedsiębiorstw branży gazowniczej : perspektywy wydobycia, magazynowania oraz konsumpcji gazu ziemnego
Autorzy:
Stefanescu, D. P.
Petrescu, V.
Powiązania:
https://bibliotekanauki.pl/articles/300352.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
gaz
ekonomia Rumunii
gas
Romanian economy
Opis:
The history of natural gas exploitation has an important role in the Romanian economical evolution. 100 years of gas activity represents a period when the event from the beginning of the last century, that of discovering the natural gas in Transylvania, subsequently changed in an important economical segment with a infrastructure of considerable dimensions.
Historia eksploatacji gazu ziemnego odgrywa ważną rolę w rozwoju ekonomicznym Rumuni. 100 lat aktywności branży gazowniczej prezentuje okres czasu mający swe korzenie w początkach ubiegłego wieku, kiedy to odkrycie złoża gazu ziemnego w Transylwanii zmieniło późniejszą ekonomię tego kraju oraz pozwoliło na zbudowanie infrastruktury o znacznych rozmiarach.
Źródło:
Wiertnictwo, Nafta, Gaz; 2009, 26, 1--2; 337-343
1507-0042
Pojawia się w:
Wiertnictwo, Nafta, Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Noninvasive stimulation opportunities in a marginal gas field
Autorzy:
Stefanescu, D. P.
Nitulete, A.
Powiązania:
https://bibliotekanauki.pl/articles/298874.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
noninvasive simulation
Laslau Mare field
Transylvanian Basin
Opis:
The Laslau Mare field is a brown gas field in the Transylvanian Basin. The field was developed in the 1970s and the production consists of more than 99% methane gas and low WGR (average of 0.03 m3/kscm). Current reservoir pressures are at a less than a third of initial values. As in any mature field with increasing water production and reservoir pressure depletion, several degrees of formation damage and tubular obstructions have been observed. Mud invasion, plugged perforation, water blockage and scale precipitation at the near wellbore region are factors impairing wells to produce at potential. Adding to the above the fact, the reservoir is water sensitive (low reservoir pressures and water wet reservoir). Severe constraints on production were seen when performing any sort of operation requiring the use of water based fluids, as severe losses occur. These procedures have always given post-job challenges to production engineers. Skin induced by mud or liquid losses is highly affecting wells post job performance. Long recovery times have been observed following workovers’ operations in Laslau Mare (0.5 to 2.5 years recovery for workovers and one to three months for wash treatments). Perforation and re-perforation operations are one of the best way to overcome the formation damage, bypass the invaded zones and open new production zones. Historically, perforation was done with casing guns in overbalanced condition. This practice induces immediately a skin created by fluids losses and prolong the flow back periods making the stimulation much less effective. Another methodology is to run through tubing guns and perforate in underbalanced conditions with smaller guns being limited by the completion size. In the latter case, the perforation performance are much less than the casing gun ones. In both cases, the full potential of the well is not achieved. A newer methodology is introducing re-perforation/perforation with casing guns in underbalanced, dry conditions, within snubbing operations. The methodology allows instantaneous gain of production and maximizes well recovery factor in the long term. Two pilot operations were executed with very good results and promising opportunities arise for candidate wells in the field.
Źródło:
AGH Drilling, Oil, Gas; 2016, 33, 2; 507-514
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new approach of mature gas fields rehabilitation from Transylvanian Basin (Romania)
Autorzy:
Stefanescu, D.-P.
Vlasin, I.
Powiązania:
https://bibliotekanauki.pl/articles/299046.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
mature gas fields rehabilitation
subsurface management of the reservoirs
incremental production
additional reserves
geological and physical model
Opis:
The mature gas fields rehabilitation represents a permanent concern of the Romgaz technical management, being considered one of the major priority of the development strategy of our company. The most part of our gas fields located in the geological unit of Transylvanian Basin are characterized by an advanced stage of exploitation, with a long production history and high cumulatives, having a current recovery factors of more than 60-70%. This status gives them the name "mature fields", or "brownfields" concepts logically associated with another notion, called "rehabilitation", also very frequently used in the world oil and gas industry. As the production decreasing became actually more obviously, due to the natural energetic decline of the reservoirs, the only viable solution to overcome this, consists in finding technical, commercial and operational best practices designed to develop incremental production and access additional reserves. This issue has preoccupied also the Romgaz technical team to implement and develop in the same time a new management strategy of this type of reservoirs, setting up a special department for designing the rehabilitation projects for our mature gas fields.
Źródło:
AGH Drilling, Oil, Gas; 2013, 30, 1; 199-207
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automated code generation for safety-related applications: a case study
Automatyczna generacja programów dla komputerowych systemów bezpieczeństwa: przykład studialny
Autorzy:
Gluch, D. P.
Kornecki, A. J.
Powiązania:
https://bibliotekanauki.pl/articles/305421.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
inżynieria oprogramowania
narzędzia oprogramowania
automatyczna generacja kodu
software engineering process
software tools
automatic code generation
Opis:
Artykuł opisuje możliwości zastosowań technologii automatycznej generacji programów (AGP) dla komputerowych systemów bezpieczeństwa. Przeprowadzone badania koncentrowały się na charakterystykach systemów oprogramowania bazujących na modelowaniu i automatycznych narzędziach oprogramowania. W szczególności studium pozwoliło na kolekcję danych dotyczących wymagań inżynieryjnych, wiedzy i wysiłku koniecznego do pomyślnej realizacji projektu wykorzystującego praktykę i technologię AGP. Takie charakterystyki, jak organizacja generowanego programu, rozmiar, łatwość czytania, relacja między programem a modelem, konstrukcje programu ułatwiające operacje w czasie rzeczywistym i generacja przerwań, były przedmiotem identyfikacji. Dodatkowo, projekt używał metodologii inżynierii oprogramowania, gdzie analiza i konstrukcja były zintegrowane w procesie realizacji programu na bazie modelu. Analiza dotyczyła statycznych i dynamicznych charakterystyk wybranych technik i narzędzi oprogramowania wpływających na bezpieczeństwo systemu.
Źródło:
Computer Science; 2007, 8, Spec. Ed; 37-48
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Liquid unloading optimization from gas wells which exploit depleted reservoirs
Autorzy:
Tataru, A.
Stefanescu, D. P.
Simescu, B.
Powiązania:
https://bibliotekanauki.pl/articles/298900.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
liquid unloading
optimization
depleted reservoirs
critical velocity
critical flow
Opis:
One of the most important aspects in natural gas exploitation, which must be constantly monitored, is the liquid impurities loading in gas wells, mostly in depleted reservoirs. The extension of this phenomenon is observed, as the natural gas reservoirs are depleted, thus substantially reduction of the reservoir pressure. The increasing quantity of liquid impurities is a major problem in gas depleted reservoirs exploitation, which could not be naturally removed in energetical depletion conditions. In this period, to avoid liquids acumulation and afterwards flooding, wells must produce with a minimum flow, named critical flow, under whose value is not possible the unloading of accumulated liquids. Wells can produce without liquid accumulations if in the tubing is obtained a gas flow velocity, greater than the liquid drop free dowfall speed limit. The velocity and critical flow depend on bottom hole or surface dynamie pressure, flow section diameter, liquid and gas density, water superficial strength. Liquid flow inerease during gas depleted reservoir exploitation, but only a part of this quantity is naturally unloaded by gas stream, the other part tend to accumulate to the bottom hole. In this conditions, the dynamie bottom hole pressure will inerease continuosly, causing continuous dropping and pronounced gas flow rate, until the well floods and stops producing. Early recognition of signs that indicates well liquid loading and the most suitable lifting system selection can eliminate problems before the production drops and layers damage.
Źródło:
AGH Drilling, Oil, Gas; 2014, 31, 2; 241-
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integrating new data acquisition to develop tight gas reservoir of a mature field through multilayer fracture stimulations
Autorzy:
Stefanescu, D. P.
Falk, I.
Iturbe, Y.
Powiązania:
https://bibliotekanauki.pl/articles/299062.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
tight gas reservoir
mature field
Mechanical Earth Model
fracture multistage simulation
fracture LGR model
special logging as formation microimager
pressure express
dipole sonic and PLT
Opis:
Laslau Mare field is situated in the central part of the Transylvania Basin, in Romania. This is a mature gas field, composed by multi-layered sandstone reservoirs, grouped in six production packages. The permeability of the reservoirs is decreasing with depth, resulting in tight gas formations in the two deepest reservoirs. One of these tight reservoirs presents a high interest for reserves development in order to accelerate the recovery factor of the field. Compared to the other production packages, which have higher recovery factors (~80%), this package has a current RF of only 65%, with more attractive remaining recoverable gas volumes. The reservoir model was built based on 3D seismic and old log data. After history matching and simulation, a remaining gas in place map was created, in order to visualize the areas of interest for future drilling or workover operations. One new infill well was drilled in 2014, in an area with higher remaining gas in place. Special logging and side- wall coring were executed in this well, in order to get a better characterization of the reservoir properties and to build a geomechanical model for hydraulic frac design. The subject package still has a decent reservoir pressure which keeps an acceptable value of the productivity index of the producer wells. The reservoir pressure recorded after the drilling helped to update the static reservoir pressure in the area; the new points were incorporated in the dynamic model in order to get morę control in the pressure history match. New population of static properties such as: porosity, net to gross and permeability have been included in the dynamic model to generate the forecast production profile for the infill well and neighbor wells. The infill is a dual completion well which means the deeper zone produces through the tubing and the shallower zone through the annulus being separated by a packer. These two zones have two different dynamic models. The production forecasts has been done also based on decline curve analysis DCA, using historical production of the neighbor wells as a reference and the decline rate of the area, in each reservoir. In that order of ideas the infill has two gas production forecasts coming from each methodology, to compare with the real gas production, which allows us evaluating the results in the well. Based on the new data, the frac stages were defined and simulated in the deeper tight reservoir, in order to select the best target layers. The initial plan was to do multistage frac stimulation, but the idea was discarded after evaluating the operational feasibility. Ten frac stages have been evaluated creating a local refmement grid around the well and designing a fracture simulation scenario. The results pointed out one stage as being the best in terms of cumulative production and it was chosen as the only finał target for frac. A PLT log was run in the infill well for the purpose of identifying the risk of water layers and the production contribution of the perforation intervals. This was matched very well with the simulation results. The results and experience gained from this new well are helping with the further planning of the production development strategy of this production package in order to inerease the final recovery factor.
Źródło:
AGH Drilling, Oil, Gas; 2015, 32, 1; 153-173
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using well testing to confirm the suspected reservoir model by seismic investigations
Zastosowanie testów otworowych do potwierdzenia modelu złożowego stworzonego przy użyciu badań sejsmicznych
Autorzy:
Tataru, A.
Stefanescu, D. P.
Simescu, B.
Powiązania:
https://bibliotekanauki.pl/articles/300337.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
modelowanie złóż
badania sejsmiczne
reservoir models
seismic investigations
Opis:
The activity of seismic surveys is very complex and has the purpose to investigate the underground, in order to discover productive geological structures and various relations among the already known structures. More often, lately, there are looked for subtle traps in the areas with complicated geology, fact that requires more attention in the projection and execution of acquisition works, as well as the processing and interpretation of the gathered information. An area intensively researched lately is the Eastern area of Romania, a very troubled area from a tectonic point of view, with many structural traps and very many faults. In this region, our company emphasized several hydrocarbon accumulations of lenticular form.
Badania sejsmiczne, wykonywane w sposób kompleksowy, mają na celu poznanie podłoża gruntowego, rozpoznania skał perspektywicznych oraz zależności pomiędzy już poznanymi strukturami. W ostatnich latach coraz częściej badania sejsmiczne wykorzystywane są do lokalizowania trudno dostępnych pułapek geologicznych znajdujących się w skomplikowanych strukturach geologicznych. Wymaga to bardzo dokładnego wykonania badań oraz odwzorowania budowy geologicznej, jak również szczegółowej interpretacji zebranych informacji. Artykuł zawiera wyniki badań sejsmicznych przeprowadzonych na terenie wschodniej Rumuni. Z tektonicznego punktu widzenia region ten cechuje się bardzo trudną budową geologiczną z wieloma strukturami tektonicznymi o charakterze pułapek geologicznych. W wyniku przeprowadzonych badań nasza Firma odkryła na tym terenie kilkanaście złóż węglowodorów.
Źródło:
Wiertnictwo, Nafta, Gaz; 2009, 26, 1--2; 391-396
1507-0042
Pojawia się w:
Wiertnictwo, Nafta, Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Productivity stimulation of depleted reservoirs by applying new technologies to open the productive layers
Autorzy:
Vlasin, I.
Stefanescu, D.-P.
Sutoiu, F.
Powiązania:
https://bibliotekanauki.pl/articles/298677.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
depleted reservoirs
geological model
3D seismics
undrained zones
perforation
reperforation
Opis:
The greatest natural gas fields belonging to Romgaz company are characterized by an advanced stage of exploitation, which actually involves a special approach, from the perspective of the works performed in the wells. As part of the most recently Romgaz strategy, for these fields have been created new geological models based on 3D seismic acquisitions, which allowed identifying some new less drained or even undrained zones. This aspect created the premises for developing the opportunities for capitalization of the new reserves volumes, by applying the advanced technologies of opening productive layers by perforation and reperforation operations with deep penetration guns, using also underbalance conditions. We mention also that new cased hole geophysical methods like PNN and RCI consisted also important elements in establishing the perforation intervals and identifying the by-passed layers. The paper contains some relevant case studies, which illustrates the efficiency of these new methods.
Źródło:
AGH Drilling, Oil, Gas; 2017, 34, 2; 569-576
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection and estimation of overpressures in gas reservoirs while drilling
Autorzy:
Foidas, I.
Stefanescu, D.-P.
Vlasin, I.
Powiązania:
https://bibliotekanauki.pl/articles/298785.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
oil and gas reservoirs
detection and estimation of overpressures
Opis:
As part of rotary - hydraulic drilling method (the most common method for drilling the wells) the rock is displaced by the action of drilling bit, being removed from the bottom and brought to the surface, through the drilling fluid. Besides this function, the drilling fluid creates a backpressure against the borehole walls, overcoming the collapse of the poorly consolidated rocks as well as the fluids influx from the formations crossed by the well.
Źródło:
AGH Drilling, Oil, Gas; 2013, 30, 1; 87-95
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production decline curve analysis for mature gas reservoirs subject to rehabilitation
Autorzy:
Tataru, A.
Stefanescu, D. P.
Bolazs, S,
Powiązania:
https://bibliotekanauki.pl/articles/298803.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
production decline
mature gas reservoir
rehabilitation
production history
depletion
gas flow rate
baseline production
decline curve analysis
reserve volumes
Opis:
Production decline under all its aspects, sometimes controllable, but more and more inconsistent with the growing demands of the natural gas market, has imposed a new approach on mature gas reservoirs which Romania owns, namely, their rehabilitation. During exploitation, after recording a considerable production history and implicitly a appreciable depletion, it is necessary the evaluation of maintaining or changing the exploitation strategy. The approaches in this sense must be from the perspective of improving the value of mature gas fields. Throughout the exploitation of a gas reservoir generally there are distinquished several stages, such as gradually increase of gas flow rates due to increasing gas wells introduced into production; maintaining of a quasi-constant production; a accentuated decline of gas flow rates of the reservoir respectively a attenuated decline of gas flow rates of the reservoir. The first three stages are quite short reported to the whole exploitation process of the reservoir. The production decline appears sooner or later depending on the manifestation form of the reservoir energy. For the accuracy of the baseline which is to be established, can be taken in discussion, as reference intervals, those periods from the production history, in which the points dispersion is minimal, and flow rates respectively the production are comparable with the current ones. Taking into consideration the decline values obtained from decline curve analysis characteristically to every exploitation stage, we consider that to define the baseline production afferent to the next stage, it is optimal to accept the specific decline of the latest exploitation period. It can be noted that throughout production history, although the exploitation of the gas reservoir was intensified, due to accessing new reserve volumes, the decline tendency is to maintain at a limited interval. This behavior indicates the fact that also in conditions of intensifying the exploitation in the future, the decline will maintain a value sensitively close to the values from the latest periods, in which rehabilitation was applied.
Źródło:
AGH Drilling, Oil, Gas; 2018, 35, 1; 255-269
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Implementation of project management concept, in depleted gas reservoir exploitation
Autorzy:
Tataru, A.
Stefanescu, D. P.
Balazs, S.
Powiązania:
https://bibliotekanauki.pl/articles/298912.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
project management
depleted gas reservoir
multidisciplinary team
team work
Opis:
In the past the gas industry focused its interest and major investments mainly on the early life of the reservoir and on the development and constant maintenance of production. But times change and currently for depleted gas reservoirs defined as reservoirs in an advanced stage of decline, energy and production should be considered as potential additional energy sources. The ideal time to start managing a reservoir is at its discovery, but Romgaz has a new approach regarding project management implemenatation for depleted gas fields. The strategy presumed, a multidisciplinary team of geophysicists, geologists, reservoir engineers, production engineers and economists. These multidisciplinary teams evaluated existing information and build up a plan for new data acquisitions, the data was integrated, processed, interpreted and correlated in a study with following objectives: -Construct 3D geological model to estimate resources. -Use reservoir engineering to estimate remaining reserves and expected ultimate recovery. -Use results of the study to identify new development opportunities on the field and forecast production scenarios. Success for this challenge depended on: -working as a team; -openness, flexibility, communication, and coordination; -persistence.
Źródło:
AGH Drilling, Oil, Gas; 2015, 32, 1; 175-183
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimizing recovery factor in multilayers mature gas field, based on decline curve analysis methodology
Autorzy:
Stefanescu, D. P.
Iturbe, Y.
Falk, I.
Powiązania:
https://bibliotekanauki.pl/articles/299016.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
mature gas fields
Laslau Mare field
recovery factor
Opis:
Generally, the mature fields have a good portion of the remaining reserves still trapped due to inefficient drainage, pressure decline, inerease in water cut, sand production and aging of the existing system. This paper addresses a methodology applied on the historical produetion behavior to identify techniques and initiatives to optimize the recovery factor based on redevelopment plans in a mature field. For Laslau Mare field in particular, there have been identified and implemented opportunities such as: infill drilling, work over optimization, dynamie underbalance perforation (DUP), acidizing, kick off with N2, propellant stimulation, snubbing, soaping, sand management, Wavefront Technology stimulation and wellhead and/or group compressor installation.
Źródło:
AGH Drilling, Oil, Gas; 2014, 31, 2; 367-393
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Utilization of Smart Field concept in mature gas field rehabilitation
Autorzy:
Tataru, A.
Stefanescu, D. P.
Simescu, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/298749.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Smart Fields
real-time monitoring
production optimisation
final recovery factor
mature gas reservoir
Opis:
Since the concept of Smart Field emerged, the operating companies work hard to enable such capabilities through various technology developments, both in the field and the office. Smart Fields help to manage, deliver, optimize and develop short and long term decisions and plans. The technology of “Smart Fields” is based on the measurement of process parameters in the reservoir and on the surface [4]. Implementing Smart Gas Field help us to maximize the value of production and increase profitability, while reducing operating costs and the use of industrial services. The integrated and automated data from sensors, simulated models and controllers provide reliable diagnostic tests, enable measurable improvements and implement a favorable environment to plan and schedule phases of production [5]. The main challenge for Romgaz was to combine and integrate older system into newer one. The problem was the installed old technology equipment, which was difficult to replace by the new one. During the last years in the most majors fields has begun a process of rehabilitation. To extend the mature gas reservoir life we redeveloped and optimized the fields, improving productivity and reservoir performance. To aim these goals, today, we need monitoring / surveillance programs for optimizing the production . It is important to measure the parameters of process conditions as accurately as possible.
Źródło:
AGH Drilling, Oil, Gas; 2016, 33, 1; 183-194
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Compressor application for extending production life cycle in mature fields
Autorzy:
Stefanescu, D. P.
Maulidani, O. A.
Audrey, B.
Powiązania:
https://bibliotekanauki.pl/articles/298948.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
mature fields
gas compression
production life cycle
Opis:
Mature gas fields are subject to network backpressure fluctuation causing liquid loading condition. The liquid loading, theoretically, occurs when the gas velocity is below its critical velocity which commonly happens in mature fields when rates become “low”. Based on Turner or Coleman’s equations, the critical velocity is proportional to the wellhead flowing pressure. This means, when the wellhead pressure increases as the result of higher external (sales) pressure, then the critical velocity will be higher. This condition will give a “pseudo” production decline of the wells. Gas compression is among the best fit-for-purpose solution to overcome the above challenges. Gas compression will help to reduce the wellhead flowing pressure which increases the gas velocity above the critical velocity as well as the well gas rate by lowering the bottomhole flowing pressure. The wells will be capable of unloading the liquid inside the wellbore and the reservoir will suffer a higher pressure drawdown. Moreover, the wells will not be impacted by the external pressure fluctuation as long as this latter is below the compressor discharge pressure. Gas compression has been implemented in Laslau Mare mature gas field to extend the production life cycle. 5 wellhead compressors have been installed since 2010 and 1 group compressor since 2014. Both types of compressor show positive results. This paper explains the application of compressor in Laslau Mare field starting with candidate selection up to cash flow analysis. A big emphasis will be given to the compressor/ well performance.
Źródło:
AGH Drilling, Oil, Gas; 2016, 33, 2; 495-506
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 85

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