production well(bore)

The impact of neglected well bore pressure losses due to fluid accumulation and kinetic energy in the fundamental energy equation used for derivation of flowing bottom-hole pressure in horizontal well have been conceived to be a considerable reason for the discrepancy between computed rates from the existing models and actual rates got from production tests. In the study, a new model that investigate all possible well bore pressure losses effect on the production rate of a horizontal oil well have been established. The newly developed model has been validated using the field data obtained from the literature and outcome got from the new model yields more satisfactory results. A more realistic results that evident all flow phenomena in petroleum production well include the initial unsteady, pseudo-steady and steady state flow condition hence flow rate at any given production time has been established for flow of oil along horizontal production well. The concept is useful to estimate flowing bottom-hole pressure and analyze its effect on production rate value of a horizontal oil well without ignoring any pressure resisting terms in the governing thermodynamic equation. The unsteadiness fluid flow period that generally observed after shut in a well have also been demonstrated. Closer agreement between the results obtained using the newly developed model and real life field measurement was observed when compared with the previous model in the literature. The study gives reservoir engineer an exact and helpful device for estimating and assessing horizontal oil well production rate.

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Preculaatities of evaluation of the effectiveness of flow deflection technologies

Moscow University Bulletin. Series 4. Geology ◽

10.33623/0579-9406-2018-6-93-101 ◽

2018 ◽

pp. 93-101

Author(s):

A. A. Kazakov ◽

V. V. Chelepov ◽

R. G. Ramazanov

Keyword(s):

Enhanced Oil Recovery ◽

Oil Recovery ◽

Production Well ◽

Oil Companies ◽

Efficiency Calculation ◽

Petroleum Companies ◽

Flow Deflection ◽

Recovery Methods

The features of evaluation of the effectiveness of flow deflection technologies of enhanced oil recovery methods. It is shown that the effect of zeroing component intensification of fluid withdrawal leads to an overestimation of the effect of flow deflection technology (PRP). Used in oil companies practice PRP efficiency calculation, which consists in calculating the effect on each production well responsive to subsequent summation effects, leads to the selective taking into account only the positive components of PRP effect. Negative constituents — not taken into account and it brings overestimate over to overstating of efficiency. On actual examples the groundless overstating and understating of efficiency is shown overestimate at calculations on applied in petroleum companies by a calculation.

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Analytical solution for estimating the influence of a pre-existing ground water flow on a geothermal heat production-injection well system

International Review of Applied Sciences and Engineering ◽

10.1556/irase.2.2011.1.2 ◽

2011 ◽

Vol 2 (1) ◽

pp. 13-17

Author(s):

I. David ◽

M. Visescu

Keyword(s):

Ground Water ◽

Water Flow ◽

Geothermal Energy ◽

Flow Direction ◽

Energy Resource ◽

Hot Water ◽

Injection Well ◽

Production Well ◽

Ground Water Flow ◽

The Earth

Abstract Geothermal energy source is the heat from the Earth, which ranges from the shallow ground (the upper 100 m of the Earth) to the hot water and hot rock which is a few thousand meters beneath the Earth's surface. In both cases the so-called open systems for geothermal energy resource exploitation consist of a groundwater production well to supply heat energy and an injection well to return the cooled water, from the heat pump after the thermal energy transfer, in the underground. In the paper an analytical method for a rapid estimation of the ground water flow direction effect on the coupled production well and injection well system will be proposed. The method will be illustrated with solutions and images for representative flow directions respect to the axis of the production/injection well system.

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