Layer | Fill | Outline |
---|
Map layers
Theme | Visible | Selectable | Appearance | Zoom Range (now: 0) |
---|
Fill | Stroke |
---|---|
Collaborating Authors
Abstract The lifecycle of any field consists of three main periods; green, plateau and maturity periods. Currently most of GUPCO fields are brown what made us very concerned to sustain and even increase our production. To achieve that, we have looked at new different options to exploit our resources better. Generally, this can be achieved by whether optimizing current system, applying new technology or evaluating unconventional resources. One of the high-potential resources that we do have in GUPCO is unconventional resources with many tight carbonate formations. Nevertheless, we did not try to appraise it before since most of our reservoirs are clastics that can be easily characterized and evaluated. On the other hand, tight carbonate formations cannot be characterized or appraised utilizing conventional logging tools or even classical reservoir engineering concepts. It always requires unique techniques relevant to its unique complexity degree especially in presence of micro-porosity and unknown fluid content. This paper sheds light on Appraisal Unconventional Resource Study that resulted in the first successful producer in the company. GUPCO started to appraise tight carbonate rocks (named Thebes in Lower Eocene) and basaltic intrusion in GoS. This study involved high integration between key disciplines; Petrophysics, Petrology and Reservoir Engineering. To manage uncertainty, we have acquired wide range of data types starting from advanced petrophysical logging tools like Magnetic Resonance, Borehole Imaging and spectroscopy, and full petro-graphic description, reaching to predicting reservoir dynamic performance using measured pressure points (RFT), its analysis and fluid characterization. Ultimately, we have succeeded to completely characterize Thebes formation, and proposing its development plan. The first successful well resulted in 300 BOPD gain as the first successful tight carbonate producer in GUPCO. Development plan is being built to drill new wells targeting unconventional resources including a few possible potential in basalt intrusions, as well. Dealing with unconventional resources is not an easy task. It requires a lot of work and analysis. Having all of your homework done is not always enough, you have to integrate with interrelated disciplines to link dots and complete the picture. In this paper, we have conceived a new approach in evaluating such formations, and it is a very good example of managing uncertainty by integrating different data to convert hypothesis into reality that can be translated ultimately into oil production and revenues.
- Asia > Middle East > Saudi Arabia (1.00)
- Africa > Middle East > Egypt > South Sinai Governorate (0.24)
- Africa > Middle East > Egypt > Gulf of Suez (0.15)
- Geology > Rock Type (1.00)
- Geology > Petroleum Play Type > Unconventional Play > Heavy Oil Play (1.00)
- Geology > Geological Subdiscipline (1.00)
- South America > Argentina > Mendoza > Cuyo Basin > Vizcacheras Field (0.99)
- North America > United States > Texas > October Field (0.99)
- Africa > Middle East > Egypt > South Sinai Governorate > Lagia Field > Thebes Formation (0.99)
- Reservoir Description and Dynamics > Unconventional and Complex Reservoirs > Oil sand, oil shale, bitumen (1.00)
- Reservoir Description and Dynamics > Improved and Enhanced Recovery > Thermal methods (1.00)
- Reservoir Description and Dynamics > Improved and Enhanced Recovery > Microbial methods (1.00)
- (2 more...)
This paper was prepared for presentation at the 1999 SPE Middle East Oil Show held in Bahrain, 20-23 February 1999.
- Europe (1.00)
- Africa > Middle East > Egypt > Gulf of Suez (1.00)
- North America > United States > Texas (0.68)
- Asia (0.68)
- Energy > Oil & Gas > Upstream (1.00)
- Water & Waste Management > Water Management > Lifecycle > Treatment (0.46)
- Water & Waste Management > Water Management > Lifecycle > Disposal/Injection (0.31)
- Europe > Hungary > Algyo Field (0.99)
- Africa > Middle East > Egypt > Western Desert > Kareem Field (0.99)
- Africa > Middle East > Egypt > Gulf of Suez > Gulf of Suez Basin > Shoab Ali Field (0.99)
- (6 more...)
Abstract GUPCO is one of the largest E&P Companies in Egypt and Middle East. It has a vast infrastructure with a large number of wells, platforms, pipelines and offshore facilities. GUPCO's peak production exceeded 600,000 BOPD in 1983 while it produces around 100,000 BOEPD today from more than ten geological formations in Gulf of Suez (GoS). GUPCO produced more than 4.6 billion STBO which represent more than 43% of Egypt's total cumulative oil to date. And in spite of that, we still have many opportunities and success yet to achieve. As one of the petroleum industry leaders, GUPCO was and will always seek success and excellence in managing its assets. For more than fifty years, GUPCO used to follow the highest standards available in petroleum industry, and applied them in all areas to achieve that outstanding excellence. From day one, GUPCO realized that understanding subsurface features and optimizing recovery from different fields are the key areas among all. As a result, GUPCO had made concerted efforts in those areas in specific. Managing giant fields is not an easy task; it requires special knowledge and experience to manage such critical asset since each 1% increment of oil recovery means tens of millions of oil barrels. And because GUPCO has four giant fields, it was serious for us to do our best to maximize their value. GUPCO started that early whilst exploration phase, appraisal, development and currently in maturity phase. Along these different phases, we utilized wide spectrum of tools starting from basic technical elements (e.g. flow equations, DCA, MBE, PTA… etc.) reaching to state-of-the-art techniques and technology available (e.g. Numerical Modeling, Artificial Intelligence and EOR) at which GUPCO uses numerical reservoir simulation extensively, utilizes neural network in different applications, and already applied TAP (Thermally-Activated Particles) technique which is called commercially BrightWater to improve sweeping efficiency, and also studied feasibility of Low Salinity Waterflooding (LoSal) which is planned to be implemented in near future after upgrading water injection facilities. In this paper, we are going to present various case studies with detailed elements GUPCO followed to accomplish that success in managing giant fields, and how such powerful techniques contributed in maximizing our asset value. We'll explain also what we did from day one highlighting different challenges we faced and how we managed to solve them, and more importantly, we'll elaborate our experience in dealing with giant fields under all levels of field's maturity, highlighting the importance of many tools we've utilized. And ultimately, proposing guidelines to be followed whilst applying Waterflooding for utmost benefit.
- Geology > Geological Subdiscipline (0.68)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Sandstone (0.46)
- Energy > Oil & Gas > Upstream (1.00)
- Water & Waste Management > Water Management > Lifecycle > Disposal/Injection (0.36)
- Africa > Middle East > Egypt > Gulf of Suez > Gulf of Suez Basin > Ramadan Field (0.99)
- Africa > Middle East > Egypt > Gulf of Suez > Gulf of Suez Basin > October Field (0.99)
- Africa > Middle East > Egypt > Gulf of Suez > Gulf of Suez Basin > Nubia Formation (0.99)
- (8 more...)
Abstract Gulf of Suez Petroleum Company (GUPCO) has been producing from October field since 1977. Currently the total daily production from the field is 80 MBFPD with average water cut 76 %. October field contains four formations with extremely different characteristics. Each formation has unique combination of lithology, downhole conditions, and formation water chemistry. Through the whole life of October field, more than 300 downhole scale samples were collected, in addition to more than 180 wellhead water samples were completely analyzed. This set of data can be used to categorize formations according to their capability to deposit a certain type of inorganic scale. After reservoir depletion, sea water had been used in water injection. By the time, field needs changed and a shallow water aquifer replaced sea water in supporting some reservoirs. Several compatibility tests and scale tendency calculations had been done before using the shallow aquifer (Zeit formation). Each well was experiencing different production conditions which dedicated deposition of certain types and amounts of inorganic scale. Scale deposition depth depended on the degree of mixing between incompatible waters, and the introducion of pressure or temperature changes along wellbore. After water breakthrough, some pressure-supported wells faced some carbonate scale deposition due to the dissolved carbon dioxide in Zeit water. Generally, Zeit formation can be used as a good alternative for sea water in water injection projects in Gulf of Suez area. Some formations contain a self-scaling water which has the ability to deposit sulfate and sulfide scales without mixing with any other water e.g. Nubia formation water. Sea water cooling, in offshore wells, usually forces scale deposition at shallow depths especially against the downhole safety valve and Christmas tree valves. This study is expected to be a good tool in recommending scale inhibition methods or products for new wells drilled in October field or any analogous field. This study can compensate for the gap between commercial scale prediction software and actual scale deposits, as most current software products rely only on thermodynamic equations for surface-collected water samples.
- North America > United States > Texas > Hockley County (1.00)
- Africa > Middle East > Egypt > Gulf of Suez (1.00)
- Water & Waste Management > Water Management > Constituents > Salts/Sulphates/Scales (1.00)
- Energy > Oil & Gas > Upstream (1.00)
- Water & Waste Management > Water Management > Lifecycle > Disposal/Injection (0.84)
- Asia > Kazakhstan > Aktobe Oblast > Precaspian Basin > North Block (0.99)
- Africa > Middle East > Egypt > South Sinai Governorate > Lagia Field > Nukhul Formation (0.99)
- Africa > Middle East > Egypt > Gulf of Suez > Gulf of Suez Basin > Zeit Formation (0.99)
- (3 more...)
ABSTRACT About thirty eight years ago, the first waterflood project in Egypt was initiated in El Morgan oil field located in the Gulf of Suez. Sequentially, more than 14 different waterflood projects have been implemented in the same area. The reservoirs that subjected for waterflooding have already produced a cumulative oil representing 40% of their original oil-in-place. On average, the projected waterflood recovery factor is 54% of their OOIP. Due to non-uniform lithology and non-uniform pattern of existing well locations in most reservoirs, peripheral waterflood was found to be the most suitable and economic waterflood pattern at project startup. As these reservoirs become more mature, the line-drive pattern (peripheral + internal injection) was found to be more effective. Seven years ago, a joint study integrating geological and engineering data was undertaken on some fields located in the western desert of Egypt. A detailed sequence-stratigraphic framework based on core description and petrophysical analysis provides the static reservoir framework for those reservoirs. These geologic data are incorporated in a detailed 3D geological model, which forms the basis for all structural and reservoir mapping. Pressure and production data were analyzed within this framework, in order to identify potential infill and recompletion opportunities as well as potential improvements in changing water-flood pattern from peripheral to internal and to dedicated injection. Since most of the reservoirs are currently in the mature stage, good managing and close monitoring for each waterflood project is extremely important. This paper provides major strategies in managing the different waterflood projects to maximize both the oil production rate and oil recovery in optimum manners. This is being achieved through several common and familiar waterflood issues including; in-fill drilling, zonal injection improvement, injection pattern modification, injection below formation parting pressure, pressure maintenance, workovers for production and injection wells, continuous data collection, and water quality monitoring. The paper also addresses the waterflood side effects of scale buildup, reservoir souring and facilities corrosion. In addition, it discusses some of the innovative techniques that have been used to maximize waterflood recovery and enable waterflooding of marginal fields.
- Research Report (0.66)
- Overview > Innovation (0.48)
- Africa > Middle East > Egypt > Western Desert > Shushan Basin > Salam Field (0.99)
- Africa > Middle East > Egypt > Western Desert > Kareem Field (0.99)
- Africa > Middle East > Egypt > Gulf of Suez > Gulf of Suez Basin > Shoab Ali Field (0.99)
- (16 more...)