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.

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 Improving efficiency of application foam sheets to remove liquid from gas wells

2019 ◽  
pp. 54-63
Author(s):  
Evgeny V. Panikarovskii ◽  
Valentin V. Panikarovskii ◽  
Yuriy V. Vaganov
Keyword(s):  
Late Stage ◽  
Gas Condensate ◽  
Gas Wells ◽  
Gas Field ◽  
Flow Rates ◽  
Field Development ◽  
Single Number ◽  
Water Cut

During the late stage of gas field development, the solution of specific issues is required to increase the flow rates of wells and reduce their water cut. The accumulated experience in the development of gas and gas condensate fields indicates that the most effective way to remove water accumulating in wells is to introduce foaming compositions based on surfactants to the bottom of the wells. The most technologically advanced application was the use of solid and liquid surfactants. The installation of smaller diameter tubing in the wells ensured the removal of fluid from the bottom of the well, but after several months of operation the conditions for removing the liquid from the bottom of the well deteriorate. Technologies for using concentric elevator systems and plunger elevators are used on a single number of wells. The main technology for removal of liquid from the bottom of gas wells is currently the technology for processing bottom holes with solid surfactants.

Technology of water shut-off treatment in the gas well using coiled tubing

2021 ◽  
pp. 75-85
Author(s):  
D. S. Leontiev ◽  
I. I. Kleshchenko ◽  
A. D. Shalyapina ◽  
M. M. Mansurova
Keyword(s):  
Bottom Water ◽  
Urgent Problem ◽  
Gas Wells ◽  
Flexible Pipe ◽  
Gas Field ◽  
Gas Well ◽  
Coiled Tubing ◽  
Bottom Hole ◽  
Water Saturated ◽  
Gas Fields

In the modern practice of gas field operation, there is a problem associated with the inflow of bottom water to the bottom hole of the well. One of the ways to solve this urgent problem is the introduction of water isolation technologies in the development of gas fields and the use of special compositions and technological equipment for pumping liquids into the watered layers of gas wells. The article deals with the application of a set of special technological measures, such as installation of surface equipment for working in a gas well using coiled tubing, descent of a flexible pipe through a column of pump and compressor pipes with a packer, construction of an inflatable packer, as well as the use of a selective water-insulating composition of the well by pumping it through existing perforation channels in the casing string. Liquids based on ethyl silicate create a kind water shut-off screen between the gas- saturated and water-saturated parts of the gas well formation.

Productive capacity evaluation of perforated filter on long-term developed fields

2020 ◽  
pp. 30-34
Author(s):  
I.Z. Ahmadov ◽  
◽  
S.E. Tagiyeva ◽  
F.N. Hagverdiyev ◽  
H.G. Huseinov ◽  
...  
Keyword(s):  
Late Stage ◽  
Production Performance ◽  
Productive Capacity ◽  
Flow Rates ◽  
Field Development ◽  
Stage Of Development ◽  
Capacity Evaluation ◽  
Actual Field ◽  
Water Cut

The paper presents the results of studies on the qualitative and quantitative effect of filter capacity on the production performance of wells at the late stage of field development. Based on the actual field data, the distribution of filter capacity values by wells, as well as the dependence of oil, water flow rates and water cut on filter power was analyzed. Via a software program the equations describing these relationships were developed. The studies showed a decrease in oil production rate and increase in water cut with filter power. The limiting capacity of the filter, to which the operation is carried out with the most optimal flow rates and water cut, is specified. It is indicated that the main reason delaying the growth of production is the intensive flooding of formations, which is characteristic for fields at the late stage of development.

scholarly journals Geological criteria and methods to increase condensate extraction at the late stage of gas condensate deposits' development

2021 ◽  
Keyword(s):  
Late Stage ◽  
Oil And Gas ◽  
Gas Condensate ◽  
Formation Pressure ◽  
Scientific Publications ◽  
Stage Of Development ◽  
Gas Formation ◽  
Initial Content ◽  
Definition Of ◽  
Secondary Methods

Formulation of the problem. Ukraine is one of the oldest oil and gas producing countries in the world. Maximum volumes of gas (68 billion m3 per year) were extracted in 1975-1978. After this period, production began to decline. About 18 billion m3 of gas was extracted in 2019 in Ukraine. The question arose of studying ways to increase the annual production of gas and condensate from old fields. The total residual reserves of deposits in late operation are estimated at more than 200 billion m3 and are classified as difficult to extract. Review of previous publications and studies. Scientific publications consider technologies and ways to increase hydrocarbon extraction. Bikman E. S showed the dynamics of the specific condensate content in gas formation depending on the formation pressure at the fields of Ukraine. Reducing pressure during the development of gas condensate deposits with a high initial content of condensate in the formation gas to the condensation start pressure leads to "avalanche" condensation of liquid hydrocarbons.This causes the loss of heavy hydrocarbons in the depletion process of this type of field. There are two ways to increase hydrocarbon recovery of gas condensate fields:to use methods to maintain reservoir pressure in the initial stages of their development, and to use secondary methods of condensate extraction that fell in the reservoir at the later stages. Object of research: gas-condensate fields with significant volumes of condensate that have fallen into them, and the possibility of its extraction at a later stage of development. Results. In this study, the authors identified systems of gas-condensate fields development to ensure the extraction of condensate in the formation. The article considers five theoretically possible options to improve the energy efficiency of gas condensate fields. For practical use, two methods are recommended: gas bypass from deposits with high pressure and low condensate content in deposits with lower formation pressure and high condensate content; continued depletion of deposits at low formation pressures less than the maximum condensation pressure. The organization of gas bypass in order to increase the extraction of condensate from depleted formations is possible under the condition of low condensate content and higher formation pressure in the deposit from which it is planned to carry out gas bypass. The transfer of gas from a deposit with higher values of the average condensation factor to a deposit with lower values is inefficient. The authors apply a mathematical device which can be used to forecast development of two deposits in the mode of gas bypass with definition of alignment time of formation pressures in their depletion. It is established that the use of the cycling process at the late stage of gas-condensate fields operation at formation pressures less than the maximum condensation pressure (P reservoir <Pmax) is impractical even in deposits with high condensate content. Thus, such deposits should continue to be developed for depletion. We analyzed the efficiency of gas condensate deposits development on the example of separate deposits of Ukraine.

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 Comparison Between Homogenous and Heterogeneous Reservoirs: A Parametric Study of Water Coning Phenomena

2021 ◽  
Vol 5 (1) ◽  
pp. 119-131
Author(s):  
Frzan F. Ali ◽  
Maha R. Hamoudi ◽  
Akram H. Abdul Wahab
Keyword(s):  
Production Rate ◽  
Oil Production ◽  
Water Production ◽  
Effective Parameters ◽  
Radial Cross Section ◽  
Heterogeneous Reservoirs ◽  
Water Breakthrough ◽  
Water Coning ◽  
Water Cut ◽  
Reservoir Simulator

Water coning is the biggest production problem mechanism in Middle East oil fields, especially in the Kurdistan Region of Iraq. When water production starts to increase, the costs of operations increase. Water production from the coning phenomena results in a reduction in recovery factor from the reservoir. Understanding the key factors impacting this problem can lead to the implementation of efficient methods to prevent and mitigate water coning. The rate of success of any method relies mainly on the ability to identify the mechanism causing the water coning. This is because several reservoir parameters can affect water coning in both homogenous and heterogeneous reservoirs. The objective of this research is to identify the parameters contributing to water coning in both homogenous and heterogeneous reservoirs. A simulation model was created to demonstrate water coning in a single- vertical well in a radial cross-section model in a commercial reservoir simulator. The sensitivity analysis was conducted on a variety of properties separately for both homogenous and heterogeneous reservoirs. The results were categorized by time to water breakthrough, oil production rate and water oil ratio. The results of the simulation work led to a number of conclusions. Firstly, production rate, perforation interval thickness and perforation depth are the most effective parameters on water coning. Secondly, time of water breakthrough is not an adequate indicator on the economic performance of the well, as the water cut is also important. Thirdly, natural fractures have significant contribution on water coning, which leads to less oil production at the end of production time when compared to a conventional reservoir with similar properties.

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