Investigation of the Influence of Pressures and Proppant Mass on the Well Parameters after Hydraulic Fracturing

Поплыгин, В В; Pavlovskaia, Ekaterina

doi:10.5829/ije.2021.34.04a.33

Cited by 4 publications

(4 citation statements)

References 16 publications

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“…The studied equations take into account the state of rocks near the borehole wall in the initial state. During the operation of a well, various phenomena can occur in the reservoir that change the permeability [26][27][28]. The change in permeability in the initial period is associated with a decrease in pressure in the reservoir and rock deformations [29,30].…”

Section: Discussionmentioning

confidence: 99%

Study on Application of Arps Decline Curves for Gas Production Forecasting in Senegal

Dieng,

Poplygin

2023

IJE

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The purpose of this study is to evaluate the feasibility of using methods for predicting the flow rates of gas wells in fields in Senegal. Accurate forecasting of natural gas production allows you to correctly set the operating mode of wells and design onshore infrastructure. One of the gas fields of Senegal was chosen as the object of study, where deposits were discovered within the exploitation perimeters in the Campanian and Santonian sandstone horizons. Gas formations have high porosity and permeability values, as well as high formation temperatures. Gas well flow rates can be predicted using hydrodynamic models, mathematical models (hyperbolic, etc.) and other methods. This study assessed the possibility of using Arps curves for long-term forecasting of gas flow rate and comparing the forecasting results with actual data. Comparison of Arps curves and actual gas flow rates for wells made it possible to note a discrepancy in the forecast results and actual values of more than 20%. These differences arose for two reasons. Deviations at the initial stage of well operation (6 months), which is associated with the adjustment of the technological operating mode of the well and the establishment of constant parameters of rocks near the wellbore. The second reason is well repairs, which change the properties of rocks near the wellbore. In general, Arps curves of exponential type showed high convergence between predicted and actual values, which makes it possible to use them in predicting the flow rate of gas wells in Senegal.

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Section: Discussionmentioning

confidence: 99%

Study on Application of Arps Decline Curves for Gas Production Forecasting in Senegal

Dieng,

Poplygin

2023

IJE

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“…Within one formation of a field, the geological conditions of bedding (permeability, reservoir pressure, depth of occurrence) can vary significantly. For this factor to be taken into account, it is necessary to use data on the relative change in permeability [41,42]. For the analysis, the data of permeability and effective pressures were normalized to dimensionless forms of k/k o and P/P o , where k o is initial reservoir permeability; P o is initial effective pressure; and k and P are permeability and effective pressure determined during well testing, respectively.…”

Section: Field Well Testing Datamentioning

confidence: 99%

A Model of Reservoir Permeability Evolution during Oil Production

2021

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In this paper, we present a mathematical model to predict the evolution of rock permeability depending on effective pressure during oil production. The model is based on the use of the results of well testing data from wells operating in the oil fields of the Perm–Solikamsk region in the north of the Volgo Ural oil and gas province. Dependences of the change in flow characteristics in the reservoir on the effective pressure were established. We performed a comparative assessment using permeability and effective pressure data that were normalized to dimensionless forms of k/ko and P/Po. The factors and their influence on the nature of the change in permeability from the reservoir pressure were determined. Depending on the type of rock, its composition, initial permeability, and bedding conditions, we determined the limits of variation of the constants in empirical equations describing the change in the permeability of rocks from the effective pressure. The mathematical model we developed enables the prediction of the change in permeability of rocks during oil production from reservoirs on the basis of reservoir properties such as initial permeability, initial reservoir pressure, average bedding depth, net-to-gross ratio, and initial effective rock pressure.

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“…The development of oil fields with hard-to-recover oil reserves is a very important problem in the nearest future. The assessment of the prospects for using geological and technical measure is related to the creation of unconventional methods; the essence of which differs not only in high technological effectiveness, but also is energy consumption with a substantial improvement in geological criteria for their applicability [3]. Even after achieving the latest techniques, in primary and secondary recovery, only one-third of the oil in the reservoir can be recovered.…”

Section: Introductionmentioning

confidence: 99%

Prediction of the Efficiency of Hydraulic Fracturing Based on Reservoir Parameters

Dieng,

Khiznyk,

Poplygin

2023

IJE

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According to experts, the use of hydraulic fracturing can increase the oil and gas recovery factor by 10-15%. The Perm Territory belongs to the old oil-producing region of the Russian Federation. To date, more than 60% of the remaining recoverable oil reserves of the fields of the Perm region are concentrated in carbonate deposits. Most of the fields are currently in the late stages of development. These fields, as a rule, are characterized by the presence of undrained zones with residual reserves and low well flow rates. Most of the remaining reserves of the fields are concentrated in low-permeability reservoirs with a high degree of heterogeneity and difficult fluid filtration. Unfortunately, the results obtained in practice do not always correspond to preliminary calculations and do not reach the planned oil production rates. In connection with the above, the problem arises of predicting the effectiveness of hydraulic fracturing operations using mathematical methods of analysis. The effectiveness of hydraulic fracturing is undoubtedly influenced by both geological and technological parameters. In this paper, for the carbonate Kashirsky (K) and Podolsky (Pd) productive deposits of one of the oil fields in the Perm region, using step-by-step regression analysis based on geological and technological parameters, a forecast of the initial oil production rate after hydraulic fracturing was made. There was good agreement between model and experimental results obtained.

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Investigation of the Influence of Pressures and Proppant Mass on the Well Parameters after Hydraulic Fracturing

Cited by 4 publications

References 16 publications

Study on Application of Arps Decline Curves for Gas Production Forecasting in Senegal

Study on Application of Arps Decline Curves for Gas Production Forecasting in Senegal

A Model of Reservoir Permeability Evolution during Oil Production

Prediction of the Efficiency of Hydraulic Fracturing Based on Reservoir Parameters

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