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    Wyświetlanie 1-6 z 6
    Tytuł:
    Identifying undrained layers from mature gas reservoirs using reservoir simulation and high resolution geophysical investigation
    Autorzy:
    Tătaru, Argentina
    Simescu, Ana Maria
    Bolázs, Sándor
    Powiązania:
    https://bibliotekanauki.pl/articles/298922.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    mature reservoir
    decline curve
    resources
    reserves
    3D simulation
    high resolution
    gas saturated layer
    production surface
    net thickness
    porosity
    Opis:
    While big discoveries and major new developments deservedly grab the headlines, mature fields are the backbone of gas production. Revitalizing these fields extends their productive lives and offers significant opportunity to expand worldwide reserves. Regardless of the definition, mature fields are a huge resource. With reserves categorized as proved or probable, attempts to expand reserve levels come at a relatively low risk. Revitalizing a mature field means taking measures that increase the value extracted from the field beyond original expectation. Using specialized software brings new opportunities in reservoir simulation of mature gas reservoirs. Combining these simulations with high resolution geophysical investigations, will offer a other perspective about mature gas reservoirs as well as the identification of potentially gas bearing layers which in the first place were not been identified through logging, and in addition to a eventual growth of gas resources but also gas reserves that could be exploited. Identifying the thinest gas saturated layers, determine the modification of gas resources and reserves values. The increase of volumes is a result of larger production surfaces, larger net thicknesses and also larger porosity attributed to this zones. For mature gas reservoirs this kind of approach offers new perspectives.
    Źródło:
    AGH Drilling, Oil, Gas; 2019, 36, 1; 125-141
    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:
    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:
    The use of computer simulations to assess the effectiveness of the revitalization of mature oil fields using the selected reservoir as an example
    Autorzy:
    Podsobiński, D.
    Stopa, J.
    Wojnarowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/298613.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    revitalization
    mature fields
    reservoir simulations
    Opis:
    The decrease in new oil field discoveries over the years makes it necessary to return to the abandoned partially depleted oil fields. Due to remaining significant amount of geological resources, mature oil field can be important in the overall balance. The production rate can be increased using various recovery methods. This paper presents a method of revitalizing mature oil fields used in Poland and wide world as well as screening criteria were presented. This article indicate the role of computer simulation as a tool in planning process of revitalization works in case of mature oil fields exploration and management. A recovery methods would be proposed, using computer simulation for the selected reservoir in south – eastern Poland as an example. The effectiveness of the recovery method would be determined through forecast of future production. An preliminary economic analysis would be performed to determine the feasibility of the seletected method taking into account the initial investment costs and different oil prices.
    Źródło:
    AGH Drilling, Oil, Gas; 2017, 34, 1; 67-80
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mature gas fields rehabilitation concepts
    Autorzy:
    Tataru, A.
    Sutoiu, F.
    Sandor, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/298801.pdf
    Data publikacji:
    2014
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    mature gas field
    rehabilitation
    concept
    reservoir
    well
    surface facilities
    Opis:
    Rehabilitation operations are applied to mature gas field, which although have a significant history production, owns a continuous energetical capacity which could be exploited in economicaly efficient conditions. For rehabilitation are selected from all the mature fields those which could additionally offer to the currently obtained basis production, a supplementary production, generated through interventions in reservoirs, wells or surface infrastructure. Although the opportunity of mature gas field rehabilitation is evident and unanimously accepted, the effective implementation of the concept represents a complex intervention. This fact is just due to natural gas reservoirs diversity, which involves developing particular models of rehabilitation, adapted to each reservoir capability. Conceptually, mature gas field rehabilitation can be divided in three sequences: reservoir, well, surface facilities. Intervention in one section or another, or concomitent intervention in all three sequences, is dictated by technical and economical reasons. Mature gas field rehabilitation must begin with main production problems identification that once recognized can be solved by remedial actions. Such corrective measures are commonly used in order to inerease the productivity of gas wells and removing restrietions on reservoir - well - surface facilities route.
    Źródło:
    AGH Drilling, Oil, Gas; 2014, 31, 2; 253-261
    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
      Wyświetlanie 1-6 z 6

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