Classification of residual oil reserves and methods of its recovery

2021 ◽  
pp. 26-33
Author(s):  
D.Yu. Chudinova ◽  
◽  
Y.D.B. Atse ◽  
R.M. Minniakhmetova ◽  
M.Yu. Kotenev ◽  
...  
Keyword(s):  
Late Stage ◽  
Oil And Gas ◽  
Residual Oil ◽  
Oil Reserves ◽  
Oil And Gas Fields ◽  
Stage Of Development ◽  
Distribution Studies ◽  
Water Cut ◽  
Gas Fields ◽  
Technical Measures

Many oil and gas fields are currently at a late stage of development, while most of them are being developed using flooding. These fields are characterized by the decreasing oil and liquid flow rates and accelerating water-cut. During the development process, the majority of oil reserves are extracted not using methods of production enhancement. Though, oil reserves within undeveloped areas are a valuable source for recovery. To involve residual reserves in active development, it is necessary to make a reasonable justification and a choice of the most effective geological and technical measures that take into account various geological field and well reservoir characteristics. Residual oil reserves at the late stage of development are classified as hard-to-recover and are mainly concentrated in areas not covered by flooding laterally and vertically. They belong to various categories that differ in the geological and technological characteristics. In this regard, it is necessary to plan various geological and technical measures taking into account the structure of residual reserves and patterns of their distribution. Studies of complex oil and gas fields were performed and a detailed analysis of the geological and physical characteristics, parameters of reservoir heterogeneity along with operational, geological and commercial assessment of reserves development were conducted.

scholarly journals THE ISSUE OF APPLICATION OF PHYSICAL AND CHEMICAL TECHNOLOGIES IN THE DEVELOPMENT OF OIL AND GAS FIELDS

2016 ◽  
pp. 71-74
Author(s):  
E. F. Zakharova ◽  
E. V. Levanova ◽  
G. N. Farkhutdinov
Keyword(s):  
Oil And Gas ◽  
High Water ◽  
Oil Fields ◽  
Chemical Methods ◽  
Oil And Gas Fields ◽  
Extraction Factor ◽  
High Water Cut ◽  
Water Cut ◽  
Gas Fields ◽  
Physical And Chemical

The efficiency of different physical and chemical technologies used in various areas and Romashkinskoye New-Elkhovskoye oil fields was researched. The result was a conclusion that at high water-cut objects, restriction of movement of water in highly permeable leached zones of a productive layer is one of the main conditions for increasing the efficiency of not only flooding, but also the use of physical and chemical methods based on improving of oil extraction factor.

scholarly journals EXPLOITATION OF GAS WELLS IN LATE STAGE OF DEVELOPMENT OF GAS FIELDS

2017 ◽  
pp. 85-89 ◽  
Author(s):  
V. V. Panikarovskii ◽  
E. V. Panikarovskii
Keyword(s):  
Production Rate ◽  
Late Stage ◽  
Gas Condensate ◽  
Gas Wells ◽  
Stage Of Development ◽  
Bottom Hole ◽  
Basic Technology ◽  
Water Cut ◽  
Foam Forming ◽  
Gas Fields

At late stage of development of gas fields they need to solve the specific issues of increasing the production rate of wells and decreasing water cut. The available experience of development of gas and gas condensate fields proves, that the most effective method of removing of water, accumulating in wells, is an injection into the bottom hole zone of foam-forming compositions, based on surfactants. The most technological in the application was the use of solid and liquid surfactants. Installation in wells of lift columns of smaller diameter ensured the removal of liquid from the bottom hole of wells, but after few month of exploitation the conditions of removal of liquid from the bottom hole of wells deteriorate. The technologies of concentric lift systems and plunger-lift systems are used in small number of wells. The basic technology for removal of liquid from bottom hole of gas wells at present time is the technology of treatment of bottom hole of wells with solid surfactants.

Oil sector damage will slow Yemen's recovery

2015 ◽  
Keyword(s):  
Oil And Gas ◽  
Content Type ◽  
Spot Prices ◽  
Oil Reserves ◽  
Oil And Gas Fields ◽  
Oil Revenue ◽  
Oil Sector ◽  
Post War ◽  
Oil Revenues ◽  
Gas Fields

Subject Impact of conflict on Yemen's oil and gas sector. Significance Yemen's oil sector has been in serious decline for years due to sabotage, field depletion and underinvestment, although it has remained the mainstay of government finances. Oil and gas fields and facilities are key assets in contention in the current conflict, even though it has halted most production and scared away many foreign operators. Yemen has around 3 billion barrels of oil reserves and 17 trillion cubic feet of gas. Oil revenues are critical to helping address the poverty that underlies much of the country's instability. Impacts Yemen supplies 3% of global LNG, and the loss of this may boost spot prices. Reduced oil revenue will make post-war Yemen even more dependent on aid. Jihadists could capture oil fields and finance themselves through local sales.

Oil Production Enhancement by EOR Candidates Optimization

2021 ◽  
Author(s):  
Denis Yurievich Pisarev ◽  
Ildar Fanurovich Sharipov ◽  
Artur Michailovich Aslanyan ◽  
Danila Nikolaevich Gulyaev ◽  
Anastasiya Nikolaevna Nikonorova
Keyword(s):  
Oil And Gas ◽  
Thick Layer ◽  
Clay Content ◽  
Oil Production ◽  
Quaternary Period ◽  
The North ◽  
Oil And Gas Fields ◽  
Production History ◽  
Water Cut ◽  
Gas Fields

The study field is located in the Nizhnevartovsk district of the Khanty-Mansi autonomous region. The deposit is located in the Nizhnevartovsk crest zone. The geological section of this deposit features a thick layer (2740-2870 meters) of Meso-Cenozoic era sedimentary rocks starting from the Jurassic period up to and including the Quaternary period, and rests unconformably on the surface of the deposits of the folded Paleozoic basement. The pay zones of study oil and gas fields features mainly sandstone-siltstone reservoirs. The study formation XX11-2 features interleaved rocks with a high clay content. In the west and south-west of the field, the oil-saturated thicknesses vary on average from 5-10 m, and in the north, the thickness increases to 10-20 m. This field has a long-lasting production history as a result of drilling vertical and horizontal wells but is currently at production decline stage. The existing reservoir pressure support system assumes that the water-cut trend at the wells will increase. In recent years, there has been advanced flooding in some areas, resulting in a drop in oil production, while the reasons for the advanced flooding are not always clear. This is often due to the progressing spontaneous fracturing in the injector wells (Aslanyan, Akimov et al., 2020).

Improving the Efficiency of Managing the Development of the West Siberian Oil and Gas Province Fields on the Basis of Differentiation and Grouping

2021 ◽  
Vol 62 (12) ◽  
pp. 1373-1384
Author(s):  
V.V. Mukhametshin
Keyword(s):  
Physicochemical Properties ◽  
Oil And Gas ◽  
Principal Component ◽  
Tectonic Structures ◽  
The West ◽  
Homogeneous Groups ◽  
Oil Reserves ◽  
Oil And Gas Fields ◽  
Research Objects ◽  
Gas Fields

Abstract —Using image recognition methods (principal component method (PCM) and discriminant analysis) made it possible to group and identify more than 500 research objects developed in five oil and gas areas of the West Siberian oil and gas province (WSOGP), which are confined to 13 large tectonic structures and 10 productive horizons. The grouping was made according to 19 parameters characterizing the mode of oil and gas occurrence and the geologic–physical and physicochemical properties of the reservoirs and hosted fluids exerting a prevailing influence on the recovery of oil reserves and used on projecting the development of research objects. The performed study has identified 19 relatively homogeneous groups of objects, each having a specific set of geologic–physical properties. It is shown that the parameters reflecting the geologic–physical and physicochemical properties of the reservoirs and fluids within the identified groups of objects exert different effects on the recovery of oil reserves. This requires differentiation and grouping of the objects during the solution of various development problems. It has been established that the specific features of groups of objects are determined primarily by areal, tectonic, and stratigraphic factors and that grouping must be performed separately in each stratigraphic system. Algorithms are proposed for grouping the developed oil and gas fields and for searching for groups of analogous objects in fields out of exploration that are most similar to the developed ones. The performed grouping and the results obtained provide the necessary information about the research objects and increase its reliability, thus making it possible to improve the efficiency of managing the oil company assets, i.e., the WSOGP oil fields.

scholarly journals Analysis of the directions for improving the development systems for oil fields at the later stage

2021 ◽  
Vol 1 (1(57)) ◽  
pp. 34-38
Author(s):  
Volodymyr Doroshenko ◽  
Oleksandr Titlov
Keyword(s):  
Late Stage ◽  
Water Movement ◽  
Oil Fields ◽  
Flow Profile ◽  
Residual Oil ◽  
Oil Reserves ◽  
Production Wells ◽  
Design Value ◽  
Oil Productivity ◽  
Water Cut

The object of research is oil fields at a late stage of their development. The most problematic issues in the development of oil fields are the formation and withdrawal of residual oil reserves. This problem is especially acute at the late or final stage, when the oil productivity of the wells decreases and the water cut of the production catastrophically increases. The most acceptable development system in such conditions is the use of methods for increasing oil recovery and, first of all, by injecting water into the reservoir. At the same time, the problematic issue is the lack of reliable information on the paths of water movement from injection to production wells and the imperfection of methods for aligning the injectivity profile in injection wells and the flow profile in production wells. In the course of the study, statistically analytical methods were used to analyze the state of development of oil fields at a late stage and industrial approbation of methods for tracing water movement and substantiation of a reagent base to align the paths of water movement and oil inflow. A set of reagents and technological methods for ensuring the regulation of the process of flooding of oil fields at a late stage of their development have been investigated and developed. It has been proven that a promising direction is the injection of a 0.1 % aqueous solution of the Polycar polymer together with water. This solution first of all penetrates into highly permeable, water-washed, formation intervals, contributing to the leveling of the injectivity profile, reducing the water cut of surrounding production wells and increasing their oil productivity. Thanks to the research carried out, directions and means of improving the systems of field development at a later stage have been developed by organizing targeted (selective) waterflooding of oil deposits based on high-quality and comprehensive control of the movement of filtration flows in the reservoir. This will ultimately contribute to achieving and maintaining the design value of reservoir pressure, preventing a decrease in the rate of decline in oil production, obtaining the design value of the sweep efficiency by waterflooding, and withdrawing residual oil reserves.

scholarly journals STRUCTURE OF EXPLORED HYDROCARBON POTENTIAL OF THE REPUBLIC OF KAZAKHSTAN

Neft i gaz ◽  
2020 ◽  
Vol 6 (120) ◽  
pp. 60-73
Author(s):  
О.S. TURKOV ◽  
Keyword(s):  
Oil And Gas ◽  
Raw Materials ◽  
Sedimentary Basins ◽  
Oil Reserves ◽  
Leading Role ◽  
Oil And Gas Fields ◽  
Small Fields ◽  
The Republic ◽  
Giant Fields ◽  
Gas Fields

The development of the economy of the Republic of Kazakhstan is largely based on a powerful base of mineral raw materials. The leading role is played by huge reserves of oil and gas. They are located in 6 oil and gas sedimentary basins of Western and Eastern Kazakhstan. More than 350 oil and gas fields have been explored in them, containing over 6.4 billion tons of recoverable oil reserves and about 4.5 trillion m3 of gas. The main volumes of oil reserves (85.2%) are concentrated in 25 large and giant fields. Numerous small objects contain only 5.3% of the reserves. In the changed situation on the world oil market, the development of such small fields with recoverable reserves of less than 1.0 million tons becomes unprofitable. In further work in new promising basins, one should focus on prospecting, first of all, large and medium-sized deposits

scholarly journals IMPROVEMENT OF EXPRESS METHOD OF HYDRODYNAMIC WELL TESTING IN THE CONDITIONS OF OIL AND GAS FIELDS OF OIL AND GAS PRODUCTION DEPARTMENT «YAMASHNEFT»

2017 ◽  
pp. 41-47
Author(s):  
E. A. Andaeva ◽  
A. V. Lysenkov ◽  
M. T. Khannanov
Keyword(s):  
Real Time ◽  
Oil And Gas ◽  
Pressure Change ◽  
Gas Production ◽  
Well Testing ◽  
Express Method ◽  
Oil And Gas Production ◽  
Oil And Gas Fields ◽  
Gas Fields ◽  
Technical Measures

To increase the efficiency of hydrodynamic well testing after the geological and technical measures, it is proposed to record the pressure change at the bottom of the well during the development by means of the GIC. Such a solution will allow to combine the process of well development after the IPF with the study, thereby increasing the control over the success of the repairs carried out without additional downtime in real time.

scholarly journals Lithium extraction from associated waters on the example of Orenburg OGCF

2021 ◽  
Vol 6 (1) ◽  
pp. 29-32
Author(s):  
A. A. Bandaletova ◽  
A. Y. Gavrilov ◽  
E. V. Galin
Keyword(s):  
Mineral Resource ◽  
Western Siberia ◽  
Oil And Gas ◽  
Raw Materials ◽  
Resource Base ◽  
Capital Costs ◽  
Oil Reserves ◽  
Oil And Gas Fields ◽  
Gas Fields ◽  
Extraction Of Metals

The state of the mineral resource base of hydrocarbons in recent years has been characterized by a decrease in proven reserves and extremely low rates of their reproduction. In Western Siberia, as in other oil-bearing provinces of Russia, economically profitable oil reserves are decreasing. It is obvious that the development of the fuel and energy complex is becoming more focused on the development of hard-to-recover reserves, which account for almost 2/3 of the proven oil reserves. Technologies for the extraction of such raw materials are characterized by higher capital costs, which requires the search for new ways to increase the profitability of projects. One of these areas is the extraction of metals from the associated water of oil and gas fields. In this paper, the possibility of using the technology for extracting lithium from the associated waters of the Orenburg oil and gas condensate field is evaluated, and the boundary conditions for the implementation of this technology are determined.

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