scholarly journals Classification of residual recoverable and non-recoverable oil reserves by the reservoir complexity index (RCI)

2021 ◽  
Vol 6 (1) ◽  
pp. 33-39
Author(s):  
B. V. Malyshev ◽  
D. V. Shuvaev ◽  
V. Yu. Klimov
Keyword(s):  
Economic Assessment ◽  
Oil Reserves ◽  
Recoverable Reserves ◽  
Complexity Index ◽  
Reservoir Permeability ◽  
Complexity Estimation ◽  
Total Oil ◽  
Index Estimation ◽  
Quality Tool

The paper considers a new engineering analytical tool for express oil reserves assessment. Proposed method is based on classifying oil reserves by complexity – reservoir complexity index (RCI). It allows to optimize the development system and form a well interventions program. The method is suggested to use three main parameters for development complexity estimation: reservoir permeability, start watercut (which contains the parameters of the curve of relative permeability, saturation and viscosity) and geological heterogeneity (pattern efficiency). An economic estimation of the well profitability is carried out by calculating PV UDC indicator (unit development cost, CAPEX / total oil production). The advantages of this indicator is that it allows to determine the economic attractiveness and does not require macro parameters and costs for the building well pads Due to the economic assessment and well ranking, it is possible to obtain profitable well pads and select candidates for sidetracking. The novelty of the work lies in the use of an updated methodology for the reservoir complexity index estimation for the remaining recoverable reserves classification. As a result, high-quality tool is created that integrates RCI and economic model. It is aimed for solving reservoir engineering problems and increasing the project cost The proposed method can be applied to other fields with minor modifications.

EXPRESS FORECAST OF PERIOD OF THE RESERVOIR DEVELOPMENT STAGES

2020 ◽  
pp. 82-85
Author(s):  
M. Yu. Kharitonovа ◽  
◽  
N. A. Matsko ◽  
Keyword(s):  
Oil And Gas ◽  
Economic Assessment ◽  
Development Stages ◽  
Reservoir Development ◽  
Main Development ◽  
Modern Classification ◽  
Micro Level ◽  
Development Prospects ◽  
Period Duration

For resources in the exploration stage, the modern “Classification of reserves” requires determining the economic efficiency of development prospects. Calculations of the development efficiency are based on the development time, which is difficult to determine without technological projects and schemes due to insufficient initial data. The identification of development stages in the preliminary economic assessment is carried out on the basis of expert appraisals without precise criteria, by analogy with the fields under development. The article establishes empirical dependencies and shows the possibility of their use for express forecast of the period for finishing work on a field (deposit), duration of the main development period, duration of the increasing production stage. Dependencies allow solving the problem of constructing a production curve in conditions of limited geological data. The express method can be used at the macro level to develop strategies for the development of oil and gas regions and at the micro level in the economic assessment of the prospects for the development of objects.

The Clipper Field, Blocks 48/19a, 48/19c, UK North Sea

2003 ◽  
Vol 20 (1) ◽  
pp. 691-698
Author(s):  
M. J. Sarginson
Keyword(s):  
North Sea ◽  
Upper Permian ◽  
Lower Permian ◽  
Reservoir Properties ◽  
Gas Field ◽  
Field Development ◽  
Matrix Permeability ◽  
Recoverable Reserves ◽  
Reservoir Permeability ◽  
Sandstone Formation

AbstractThe Clipper Gas Field is a moderate-sized faulted anticlinal trap located in Blocks 48/19a, 48/19c and 48/20a within the Sole Pit area of the southern North Sea Gas Basin. The reservoir is formed by the Lower Permian Leman Sandstone Formation, lying between truncated Westphalian Coal Measures and the Upper Permian evaporitic Zechstein Group which form source and seal respectively. Reservoir permeability is very low, mainly as a result of compaction and diagenesis which accompanied deep burial of the Sole Pit Trough, a sub basin within the main gas basin. The Leman Sandstone Formation is on average about 715 ft thick, laterally heterogeneous and zoned vertically with the best reservoir properties located in the middle of the formation. Porosity is fair with a field average of 11.1%. Matrix permeability, however, is less than one millidarcy on average. Well productivity depends on intersecting open natural fractures or permeable streaks within aeolian dune slipface sandstones. Field development started in 1988. 24 development wells have been drilled to date. Expected recoverable reserves are 753 BCF.

scholarly journals EVALUATING THE DEGREE OF COMPLEXITY OF TIGHT OIL RECOVERY BASED ON THE CLASSIFICATION OF OILS

2020 ◽  
pp. 76-81
Author(s):  
G. Efendiyev ◽  
M. Karazhanova ◽  
D. Akhmetov ◽  
I. Piriverdiyev
Keyword(s):  
Cluster Analysis ◽  
Oil Recovery ◽  
Fuzzy Cluster ◽  
Fuzzy Cluster Analysis ◽  
Recovery Coefficient ◽  
Reservoir Permeability ◽  
Oil Density ◽  
The Relationship ◽  
Degree Of Recovery

The article discusses the results of the use of cluster analysis in assessing the degree of oil recovery complexity and its impact on the performance indicator. For this purpose, clustering was performed using a fuzzy cluster analysis algorithm. It should be noted that along with the deposits of heavy and highly viscous oils, a large share of hard-to-recover reserves is also confined to conditions with very low reservoir permeability values. Data on viscosity, oil density and oil permeability of in-situ conditions from various fields of Kazakhstan are collected. Using the results of this classification, a statistical analysis of indicators of various types of hard-torecover oils was performed. In the process of analysis, a generalized characteristic was determined for each class of oil, including viscosity, oil density and reservoir permeability. The generic characteristic is a linear transformation of the three characteristics. The results were subjected to statistical processing. At the same time, an attempt was made to establish and analyze the relationship between the degree of recovery complexity of hard-to-recover oils and oil recovery coefficient. In the course of the analysis, the average values of the oil recovery coefficient and the index of the degree of recovery complexity of hard-to-recover oil within each cluster were calculated and the relationship between them was plotted. The observed dependence, built on averaged points, is close to a power law, and, as one would expect, with an increase in the degree of oil recovery complexity, the oil recovery coefficient falls. The obtained estimates of the degree of oil recovery complexity allow us to rank different types of oils by their viscosity, density and reservoir permeability, which can be used to compare types of hard-to-recover oils by the value of the quality indicator. Methods to solve the problem of hard-to-remove high-viscosity and heavy oils should be aimed at reducing the viscosity of oil in the reservoir: injection of hot water / steam into the reservoir, the use of electric heaters, etc. Purpose. Assessment of the degree of oil recovery complexity and its impact on the efficiency of field development. The technique. The solution of the tasks set in the work was carried out on the method of mathematical statistics and the theory of fuzzy sets. In this case, the methods of processing the results, the correlation analysis, and the algorithm of fuzzy cluster analysis were used. Results. As a result of studies, 4 classes were obtained, each of which characterizes the degree of oil recovery complexity, a parameter was proposed for quantifying the degree of complexity, including oil density and viscosity, reservoir permeability, a relationship between this parameter and oil recovery coefficient was obtained. Scientific novelty. A classification of hard-to-recover reserves based on a fuzzy cluster analysis has been performed, and a parameter has been proposed for quantifying the degree of oil recovery complexity, a relationship has been obtained that allows judging the oil recovery by the degree of oil recovery complexity. Practical significance. The results obtained make it possible to classify hard-to-recover reserves and make decisions on the choice of methods for influencing the reservoir in various geological conditions.

scholarly journals Construction processes of roof structures: a systematic review

2020 ◽  
Vol 6 (4) ◽  
pp. 0520-0527
Author(s):  
Thaisa Lana Pilz ◽  
Mayara Scheuer ◽  
Marcell Mariano Corrêa Maceno ◽  
Thalyta Genaro ◽  
Nicolle Christine Sotsek
Keyword(s):  
Systematic Review ◽  
Environmental Impact ◽  
Construction Industry ◽  
New Materials ◽  
Construction Techniques ◽  
New Ideas ◽  
Research Questions ◽  
Quality Tool ◽  
Selection Of

Despite the fact that the construction industry in Brazil is traditionally recognized for the use of craft construction techniques, in the last few years, there has been a growth in the search for new materials, processes, and technologies for this segment.  This is mainly due to the great environmental impact that this sector causes. Based on this context, this article aimed to map the constructive processes of existing roofs in the literature, to raise its advantages, disadvantages and previous cases. To achieve this aim, the systematic review method based on three phases –  research questions, selection of documents and classification of selected documents, and the 5W2H quality tool were used. Thus, this research could contribute to the literature on this topic, as well as encourage the idealization of new ideas of roof construction processes.

Features and measures to improve the efficiency of development of a perspective small oil field

2020 ◽  
pp. 31-43
Author(s):  
T. K. Apasov ◽  
G. T. Apasov ◽  
E. E. Levitina ◽  
E. I. Mamchistova ◽  
N. V. Nazarova ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Oil Field ◽  
Oil Fields ◽  
Transport Infrastructure ◽  
Field Analysis ◽  
Field Development ◽  
Oil Reserves ◽  
Second Stage ◽  
Recoverable Reserves ◽  
Two Stages

Despite the current political and economic situation in Russia, mining in small oil fields is important and topical issue. We have conducted a geological and field analysis of the development of one of such small oil fields from setting into operation to shut down and have identified the reasons for the low production of oil reserves and the failure to achieve the design oil recovery factor. At the same time, the field has sufficient reserves of recoverable reserves, and there is an available transport infrastructure, which proves the necessity to consider rerun it for the development. For this purpose, geological and technical actions have been developed and are being proposed for implementation to improve the efficiency of field development. These actions envisage implementation in two stages: the first with minimal costs and the second with higher costs. At the first stage, at the existing reservoir pressure, we recommend to perform forced fluid withdrawals with an increase in depression on the reservoir. At the second stage, we offer actions at a higher cost, such as hydraulic fracturing, sidetracking. As a result of the analysis, actions have been developed to increase selection from initial recoverable reserves and increase the economic efficiency when the field is rerun.

PETROLEUM EXPLORATION IN CANADA

Geophysics ◽  
1976 ◽  
Vol 41 (3) ◽  
pp. 546-552
Author(s):  
R. O. Lindseth
Keyword(s):  
Export Market ◽  
Petroleum Exploration ◽  
Western World ◽  
Oil Reserves ◽  
Total Oil ◽  
Substantial Degree

Canada is a country rich in petroleum. Not only has it been, for many years, the only country in the western world totally self‐sufficient in production, it has also been able to supply a healthy export market. For many years discoveries of new oil exceeded consumption, and substantial proven reserves were accumulated. In spite of this rather considerable development of production, only one major basin has been explored to any substantial degree, and only a fraction of the total oil believed to lie in place has been discovered to date. Provinces with oil reserves have prospered under stable, equitable legislation that fostered substantial expenditures of funds for exploration (Figure 1 ).

scholarly journals EVALUATION AND CLASSIFICATION OF PROVED AND UNDEVELOPED OOIP BY RESERVOIR COMPLEXITY INDEX (IN CASE OF SALYM BROWN OIL FIELDS)

2020 ◽  
Vol 1 ◽  
pp. 44-48
Author(s):  
M.V. Naugolnov ◽  
◽  
S.I. Gabitova ◽  
R.I. Murtazin ◽  
V.Yu. Klimov ◽  
...  
Keyword(s):  
Oil Fields ◽  
Complexity Index

scholarly journals Increase in recoverable oil reserves based on system treatments of injection wells

2021 ◽  
Vol 6 (3) ◽  
pp. 121-129
Author(s):  
Artem V. Fomkin ◽  
Andrey M. Petrakov ◽  
Stanislav A. Zhdanov ◽  
Robert R. Rayanov ◽  
Elena N. Baykova ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Oil Production ◽  
Production Potential ◽  
Injection Wells ◽  
Oil Reserves ◽  
Recoverable Reserves ◽  
Technological Efficiency ◽  
Khanty Mansi Autonomous

Background. The article considers and justifies the need to take into account the indicators that characterize the amount of balance reserves involved in the development, as well as the increase in recoverable oil reserves due to EOR, when evaluating the technological efficiency of the treatment of the alignment of the pick-up profile (RUNWAY). Aim. If the increase in recoverable reserves is significantly less than production, this will lead to a loss of oil production potential. This fact is of particular importance in the conditions of the arrangement of the old squares and the presence of a developed infrastructure on them. Materials and methods. Materials were used to assess the dynamics and degree of development of oil reserves, calculations of the increase in recoverable reserves. Results. The article presents the results of the accumulated technological efficiency of work to improve oil recovery using various technologies for leveling the intake profile (runway) and non-stationary flooding at the facilities of Subsurface user in Khanty-Mansi Autonomous Area – Yugra on the basis of system-targeted impact on the reservoir. The article also presents materials on the assessment of the dynamics and degree of development of oil reserves, as well as calculations of the increase in recoverable reserves. Conclusions. Calculations based on the assessment of the increase in initial and residual recoverable oil reserves from the implementation of annual EOR programs carried out in accordance with the methodology of PJSC Gazpromneft indicate that the implementation of these programs contributes to additional involvement in the active development of previously poorly drained or non-drained oil reserves.

scholarly journals Overview and methods in Enhanced Oil Recovery

2021 ◽  
Vol 2070 (1) ◽  
pp. 012061
Author(s):  
Aashima Khan ◽  
Shaivya Saxena ◽  
Srishti Baloni ◽  
Mudita Sharma ◽  
Jagadeeshwar Kodavaty
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Enhanced Recovery ◽  
Porous Rock ◽  
Oil Reserves ◽  
Rock Structure ◽  
Recovery System ◽  
Set Up ◽  
Conventional Oil

Abstract After the conventional oil recovery system, it was estimated that huge amount of oil reserves is still remaining un-extracted. Because of tremendous demand for oil and established facilities at the oil exploration sites after conventional recovery got significant attention. Since the oil is entrapped in the porous rock structure and is difficult to evacuate, focus was made on tertiary recovery of oils. Many methods have been suggested by various researchers with different techniques to mobilize the entrapped oil in the well. The classification of the techniques will give different methods of recovery. The rheology, surface tension, mobility ratio are the important parameters that were considered during the enhanced recovery. The review that is presented here gives the overall methods for recovery and various materials and important parameters to be considered for the enhanced oil recovery. A new substitute for the sand pack column is suggested to conduct the bench top experimental set up that would ease the work of flooding with alkaline, surfactant and polymers.

MORE WELLS, MORE OIL—A CASE STUDY OF RESERVES GROWTH IN THE KENMORE FIELD

2006 ◽  
Vol 46 (1) ◽  
pp. 35
Author(s):  
J.E. Skinner ◽  
M.J. Altmann ◽  
T.H. Wadham
Keyword(s):  
Economic Value ◽  
Oil Field ◽  
Oil Fields ◽  
Seismic Survey ◽  
Current Estimate ◽  
Oil Reserves ◽  
Recoverable Reserves ◽  
Stock Tank ◽  
Infill Drilling

The Kenmore oil field in the Eromanga Basin of southwest Queensland was discovered in 1985. Since then, a further 32 wells have been drilled and more than 12.5 MMSTB of oil has been produced from the Birkhead Formation/Hutton Sandstone. Oil production over the last year has averaged 1,220 barrels per day totalling some 0.45 million stock tank barrels (MMSTB)Oil reserves in Kenmore were originally estimated at 2.2 MMSTB following the Kenmore–1 discovery well drilled in 1985. In the following 20 years, infill drilling, a 3D seismic survey, various reservoir studies and better -than-expected recovery efficiency, have steadily increased the ultimate recoverable reserves to the current estimate of 14.3 MMSTB.The growth of reserves at Kenmore is primarily attributed to better drainage of the complex reservoir framework within the lower Birkhead Formation resulting from recognition of the variable lateral connectivity of the reservoir. Due to the initial estimate of the ultimate field reserves being significantly smaller than now recognised and the resultant conservative drilling program, the economic value of the field was not maximised. This experience has implications for the ongoing development of the Kenmore field and suggests that other Birkhead/Hutton oil fields should be developed more aggressively to prevent history repeating itself.

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