Oil Production Stimulation by Creating a Vacuum in the Annular Space of the Well

Isaev, A.A.; Takhautdinov, Rustem Shafagatovich; Malykhin, V.I.; Sharifullin, A.A.

doi:10.2118/198401-ms

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…Numerous studies [6][7][8][9][10][11][12][13][14][15] have addressed the problem of finding technical solutions to reduce gas pressure in the annular space at various methods of well operation. A review Energies 2022, 15, 5045 2 of 13 in [16] illustrates tools to reduce the impact of gas on the operation of downhole sucker-rod pumps and their effectiveness under various operating conditions.…”

Section: Introductionmentioning

confidence: 99%

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The Rod String Loads Variation during Short-Term Annular Gas Extraction

Artyukhov

Isaev²,

Дроздов

et al. 2022

Energies

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This paper highlights field studies to determine the nature of variations in the load on the sucker-rod string during short-term gas extraction from the wellbore annulus. The results of step-by-step gas extraction from the annular spaces of the wells of fields developed by PJSC TATNEFT are provided. In the course of investigations, we have obtained both the trends of maximum and minimum loads on the polished rod during annular gas extraction, and the dependence of maximum load increment on the rod string with respect to pump size and pressure variation in the annular space. The analysis of the research data resulted in the elaboration of guidelines for short-term extraction of annular gas from wells operated by the PCP units.

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Section: Introductionmentioning

confidence: 99%

“…In recent years, the method of separating gas from the wellbore annulus by a compressor and pumping it into the manifold line has been increasingly employed in the oil production industry [9,10]. Piston compressors are mainly used for these purposes [18,19].…”

Section: Introductionmentioning

confidence: 99%

The Rod String Loads Variation during Short-Term Annular Gas Extraction

Artyukhov

Isaev²,

Дроздов

et al. 2022

Energies

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“…The development of technologies for reducing the annulus pressure to the optimum values is one of the urgent tasks for increasing the efficiency of mechanized oil production. There are various methods for its solution: annulus gas bypass into the tubing through the gas lift valve [19], use of ejector [20], annulus gas suction by the compressor into the line [21,22].…”

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confidence: 99%

Development of a pump-ejector system for SWAG injection into reservoir using associated petroleum gas from the annulus space of production wells

Дроздов¹,

Gorelkina²

2022

PMI

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Implementation of SWAG technology by means of water-gas mixtures is a promising method of enhanced oil recovery. The use of associated petroleum gas as a gas component in the water-gas mixture allows to significantly reduce the amount of irrationally consumed gas and carbon footprint. Relevant task is to choose a simple, reliable and convenient equipment that can operate under rapidly changing operating conditions. Such equipment are pump-ejector systems. In order to create water-gas mixture it is proposed to use associated gas from the annulus space. This solution will reduce the pressure in the annulus space of the production well, prevent supply disruption and failure of well equipment. The paper presents a principal technological scheme of the pump-ejector system, taking into account the withdrawal of gas from the annulus space of several production wells. The layout of the proposed system enables more efficient implementation of the proposed technology, which expands the area of its application. Experimental investigations of pressure and energy characteristics of the ejector have been carried out. Analysis of the obtained data showed that it was possible to increase the value of maximum efficiency. The possibility of adapting the system in a wide range of changes in operating parameters has been established. Recommendations on selection of a booster pump depending on the values of working pressure and gas content are given.

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A Set of Options for Stimulation of Wells

Isaev¹,

Takhautdinov²,

Malykhin³

et al. 2022

Day 1 Tue, November 15, 2022

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The most effective well interventions employed by Shehsmaoil Management Company LLC (Republic of Tatarstan, Russia) are the following [1-4]: – hydraulic fracturing (HF), – forced gas extraction unit from a wellbore annulus. The article addresses the issues of increasing recoverable reserves of oil, oil recovery factor, speeding up development, improving the profitability of deposits and fields (with carbonate deposits) as a whole through the introduction of proppant fracturing technology (PHF), multistage fracturing in wells with horizontal endings, drilling a compact grid of wells with subsequent fracturing. It is indicated that optimization of PHF (transition to hybrid hydraulic fracturing) by combining low-viscosity and cross-linked fluids depending on the performance during test injections made it possible to stabilize product's water cut, increase well productivity in terms of oil and stabilize oil recovery reduction rate. All relevant operations are implemented by three functioning hydraulic fracturing fleets operated that uses the equipment mounted on all-terrain chassis. The paper reviews and summarizes the application results of various fracturing fluid systems: borate-crosslinked guar fluids, Bioxan modified natural polysaccharide, fluids based on fresh water or viscoelastic surfactants, guar-free low-viscosity and high-viscosity water-based polymer systems, synthetic gelling agent. All the described systems feature the required sand trapping properties, so it is the price of the systems that determines the best choice. The article considers a portable set of equipment for forced extraction of gas from the wellbore annulus and its subsequent pumping into the oil pipeline by means of gas extraction sets of the KOGS type. In the conditions of shallow fields with hard-to-recover reserves the Company specialists encounter the challenge of increasing the profitability of development. The main reserves of the fields under consideration are confined to carbonate targets, and the reserves of deposits of the Kizelovsky gorizont of the Tournaisian stage occupy a considerable place by their quantity. Development of this object is mainly complicated by the following factors: complex geological structure, viscous, heavy and resinous oil, low reservoir temperatures and pressures. For the reasons of low efficiency of classical development systems, systems of reservoir pressure increase, it is necessary to develop, test, introduce new methods of intensification, new elements of development - compaction of well grid, horizontal wells (HW) with the following multistage fracturing. The fields considered in the article are tectonically controlled by the Western slope of South Tatar arch and Eastern edge of Melekesskaya depression, territorially located in Tatarstan.

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Oil Production Stimulation by Creating a Vacuum in the Annular Space of the Well

Cited by 4 publications

References 3 publications

The Rod String Loads Variation during Short-Term Annular Gas Extraction

The Rod String Loads Variation during Short-Term Annular Gas Extraction

Development of a pump-ejector system for SWAG injection into reservoir using associated petroleum gas from the annulus space of production wells

A Set of Options for Stimulation of Wells

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