Effect of Fluid Volume and Production Rate on Oil Recovery in Oil Field Development by Waterflooding Methods (Russian)

2008 ◽  
Author(s):  
R.N. Diyashev ◽  
A.F. Blinov
Keyword(s):  
Production Rate ◽  
Oil Recovery ◽  
Fluid Volume ◽  
Oil Field ◽  
Field Development ◽  
Oil Field Development

scholarly journals Well Killing Technology before Workover Operation in Complicated Conditions

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 654
Author(s):  
Dmitry V. Mardashov ◽  
Mikhail K. Rogachev ◽  
Yury V. Zeigman ◽  
Vyacheslav V. Mukhametshin
Keyword(s):  
Oil Recovery ◽  
Experimental Studies ◽  
Carbonate Reservoir ◽  
Oil Field ◽  
Fluid Loss ◽  
Oil Emulsion ◽  
Field Development ◽  
Oil Field Development ◽  
Reservoir Conditions ◽  
Complicated Conditions

Well killing is an important technological stage before conducting workover operation, one of the tasks of which is to preserve and restore the natural filtration characteristics of the bottomhole formation zone (BFZ). Special attention should be paid to the choice of well killing technologies and development of wells in complicated conditions, which include abnormally low reservoir pressure, high oil-gas ratio and carbonate reservoir type. To preserve the filtration characteristics of the productive formation and prevent fluid losses in producing wells during well killing operation, blocking compositions are used. At the same time, an informed choice of the most effective well killing technologies is required. Consequently, there is a need to conduct laboratory physicochemical and coreflood experiments simulating geological, physical, and technological conditions of field development, as similar as possible to actual reservoir conditions. The article presents the results of experimental studies on the development well killing technologies of producing wells during workover operation in various geological, physical, and technological conditions of oil field development. Physicochemical and coreflood laboratory experiments were carried out with the simulation of the processes of well killing and development of wells in reservoir conditions with the use of modern high-technology equipment in the Enhanced Oil Recovery Laboratory of the Department of Development and Operation of Oil and Gas Fields at St. Petersburg Mining University. As a result of the experimental studies, new compositions of well killing and stimulation fluids were developed, which ensure to prevent fluid loss, gas breakthrough, as well as the preservation, restoration and improvement of the filtration characteristics of the BFZ in the conditions of terrigenous and carbonate reservoirs at different stages of oil field development. It is determined that the developed process fluids, which include surfactants (YALAN-E2 and NG-1), have a hydrophobic effect on the porous medium of reservoir rocks, which ultimately contributes to the preservation, restoration and improvement of the filtration characteristics of the BFZ. The value of the presented research results is relevant for practice and confirmed by the fact that, as a result of field tests of the technology for blocking the BFZ with the composition of inverse water–oil emulsion during well killing before workover operation, an improvement in the efficiency of wells operation was obtained in the form of an increase in their oil production rate by an average of 5–10 m3/day, reducing the time required for the well to start operating up to 1–3 days and reducing the water cut of formation fluid by 20–30%.

scholarly journals Vankor oil field development experience

2019 ◽  
pp. 47-51
Author(s):  
Evgeny V. Panikarovskii ◽  
Valentin V. Panikarovskii ◽  
Alexandra E. Anashkina
Keyword(s):  
Oil Recovery ◽  
New Technologies ◽  
Development Rate ◽  
Oil Field ◽  
Water Flooding ◽  
Energy Potential ◽  
Field Development ◽  
Oil Field Development ◽  
Third Stage ◽  
Recovery Technique

The Vankor oil field is in the third stage of the development. Well stock mostly includes horizontal and directional wells. Analysis of the field development showed that actual development rate is much higher than planned. Energy potential of the field is drained out due to formation pressure decline and water flooding. New technologies for restoring well productivity, such as acid treatment and hydraulic fracturing should be introduced to maintain planned development rate. Drilling multilateral wells should be used as main enhanced oil recovery technique.

Efficiency Analysis of the Geological-Technical Activities in Severo-Ostrovnoe Field

2019 ◽  
Vol 16 (11) ◽  
pp. 4584-4588
Author(s):  
I. A. Pogrebnaya ◽  
S. V. Mikhailova
Keyword(s):  
Hydraulic Fracturing ◽  
Production Rate ◽  
Oil Recovery ◽  
Oil Production ◽  
Horizontal Wells ◽  
Oil Field ◽  
Field Development ◽  
Multi Stage ◽  
Field Works ◽  
Technical Measures

The work is devoted to identifying the most relevant geological and technical measures carried out in Severo-Ostrovnoe field from the period of its development to the present. Every year dozens of geotechnical jobs (GJ) are carried out at each oil field-works carried out at wells to regulate the development of fields and maintain target levels of oil production. Today, there are two production facilities in the development of the Severo-Ostrovnoe field: UV1a1 and BV5. With the help of geotechnical jobs, oil-producing enterprises ensure the fulfillment of project indicators of field development (Mikhailov, N.N., 1992. Residual Oil Saturation of Reservoirs Under Development. Moscow, Nedra. p.270; Good, N.S., 1970. Study of the Physical Properties of Porous Media. Moscow, Nedra. p.208). In total, during the development of the Severo-Ostrovnoe field, 76 measures were taken to intensify oil production and enhance oil recovery. 12 horizontal wells were drilled (HW with multistage fracking (MSF)), 46 hydraulic fracturing operations were performed, 12 hydraulic fracturing operations were performed at the time of withdrawal from drilling (HW with MSF), five sidetracks were cut; eight physic-chemical BHT at production wells; five optimization of well operation modes. The paper analyzes the performed geological and technical measures at the facilities: UV1a1∦BV5 of the Severo-Ostrovnoe field. Four types of geological and technical measures were investigated: hydraulic fracturing, drilling of sidetracks with hydraulic fracturing, drilling of horizontal wells with multi-stage hydraulic fracturing, and physic-chemical optimization of the bottom-hole formation zone. It was revealed that two geotechnical jobs, namely, formation hydraulic fracturing (FHF) and drilling of lateral shafts in the Severo-Ostrovnoe field are the most highly effective methods for intensifying reservoir development and increasing oil recovery. SXL was conducted at 5 wells. The average oil production rate is 26.6 tons per day, which is the best indicator. Before this event, the production rate of the well was 2.1 tons per day. Currently, the effect of ongoing activities continues.

Oil Recovery Evaluation for Late Stage of Oil Field Development

2005 ◽  
Author(s):  
V. Chernoglazov ◽  
V. Dobrynin ◽  
V. Ryjkov ◽  
A. Gorodnov
Keyword(s):  
Oil Recovery ◽  
Late Stage ◽  
Oil Field ◽  
Field Development ◽  
Oil Field Development

scholarly journals Simulating the strategies of oil field development for enhanced oil recovery

2020 ◽  
Vol 24 (Suppl. 1) ◽  
pp. 411-422
Author(s):  
Muhammad Tahir ◽  
Wei Liu ◽  
Asadullah Memon ◽  
Hongtao Zhou ◽  
Wei Liu ◽  
...  
Keyword(s):  
Simulation Model ◽  
Oil Recovery ◽  
Oil Field ◽  
Development Plan ◽  
Rapid Decline ◽  
Formation Pressure ◽  
Compositional Simulation ◽  
Field Development ◽  
Oil Field Development ◽  
Development Plans

Many years have passed in oil field development but primary challenges faced by the X reservoir are the rapid decline of formation pressure and the significant solution gas released from the formation, which impairs production. Based on these challenges, a compositional simulation model of the X reservoir was constructed and run to establish the future development plans. The basic reservoir data collection and processing, quality assurance of the data, characteristic pressure-volume-temperature (PVT) matching by ECLIPSE PVTi, and simulation of various adjustment strategies to forecast development plans, as well as data sensitivity analysis and optimization has been included in this study. In addition, to establish a desirable development plan, the simulation model is set up in great consistency with the geological model resulted from the seismic and logging interpretations. Also, emphases are paid on establishing matches with the reported lab data from production wells by PVTi. Results revealed that the specific reservoir development plan intends to reinstate or maintain formation pressure of the X reservoir. All design and optimization studies are set to comprehend the reservoir with the numerical model.

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