Gas removal efficiency from a well

Isaev, A.A.; Takhautdinov, R. S.; Malykhin, V.I.; Sharifullin, A.A.

doi:10.18599/grs.2018.4.359-364

Cited by 7 publications

(3 citation statements)

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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%

“…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%

“…∆P = 1.49 − 0.8 = 0.69 MPa, T w = 150 • C is the gas temperature after the third stage of compression, Q is the gas flow rate in the third stage, K is the compressibility factor. V = Q * 2893.17 * (∆P + 0.101325)/(273.15 + T w * K) = 10.2 * 2893.17 * (0.69 + 0.101325)/(273.15 + 150) * 1.0 = 55.80 Nm 3 /h (9) which corresponds to the factory specifications of 57.0 ± 10% Nm 3 /h at a pressure of 2.5 MPa in the line, excluding the K factor.…”

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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%

Section: Introductionmentioning

confidence: 99%

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

Isaev¹,

Takhautdinov²,

Malykhin³

et al. 2019

Day 3 Fri, October 18, 2019

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A significant number of small oilfields on the territory of the Republic of Tatarstan are operated by small oil companies. These fields are mostly characterized by high oil viscosity and low formation pressures. Sheshmaoil Management Company LLC is a leading one among small oil companies of Tatarstan in many respects. The structure of Sheshmaoil Management Company LLC includes 7 small oil-producing companies, three of them (Sheshmaoil JSC, Ideloil JSC, Geotekh JSC) are actively engaged in R&D activities in the field of improving the oil production efficiency from wells through their evacuation. On the oilfields of Sheshmaoil JSC (Severnoye, Letneye, Novo-Sheshminskoye and Krasnooktyabrskoye fields), 19 local structures are under commercial development, the objects of which are oil deposits of carbonate sediments of the Bashkirian and Tournaisian stages, Vereiskian horizon, terrigenous sediments of the Aleksinsky and Tula-Bobrikovskiy horizons of the Early Carboniferous, Kynovskiy and Pashiyskiy horizons of the Late Devonian. 55 oil deposits confined to twelve local uplifts (Svetlogorskoye, Zagonnoye, Dachnoye, Novo-Kadeevskoye, Krasno-Klyuchevskoye, Kuteminskoye, Vostochno-Kuteminskoye, Yasakskoye, Sukhoye, Grivinskoye, Yuzhno-Ulyanovskoye, Serebryanno-Klyuchevskoye) have been identified within the area of the Dachnoye field of Ideloil JSC. Eight of them are confined to the carbonate deposits of the Vereiskian horizon, 8 — to the deposits of the Bashkirian stage, 1 deposit - to the Aleksinsky horizon, 13 deposits are confined to the deposits of the Tournaisian stage of Early Carboniferous. To terrigenous deposits of the following horizons: Tula - 4 deposits, Bobrikovskiy - 16 deposits, Kynovskiy - 5 deposits. 42 deposits of oil are under commercial development.

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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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Gas removal efficiency from a well

Cited by 7 publications

References 0 publications

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

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

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

A Set of Options for Stimulation of Wells

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