Peculiarities of assessing the reservoir properties of clayish reservoirs depending on the water of reservoir pressure maintenance system properties

Palyanitsina, Aleksandra; Sergeevich, Sukhikh Alexander

doi:10.5937/jaes18-24544

Cited by 9 publications

(4 citation statements)

References 7 publications

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“…One of the approaches is based on the use of the Zhigach-Yarov device, comprising a sample chamber with a piston that is connected to a displacement counter. [32,33]. Higher readings of the displacement gauge during experiments with this setup correspond to the higher volume of rock sample expansion.…”

Section: Introductionmentioning

confidence: 84%

Experimental Setup for Evaluating Rock Volume Alteration and Its Application for Studying Shale Rock Swelling in Various Fluids

et al. 2022

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Rock swelling and rock disintegration in the presence of drilling, stimulation and completion fluids are considered to be the main reasons for operational and production problems for wells in clay-rich formations. The impact of these fluids on rock properties shall be established for the effective treatment design. This paper describes the development of the experimental setup for studying rock swelling in reservoir conditions and the application of this setup for the evaluation of swelling mechanisms of shale rock samples. Swelling quantification was performed using measuring piston displacement that was caused by rock swelling in a piston accumulator during pressure maintenance. We studied the interaction of the disintegrated rock samples with water-based and hydrocarbon-based fluids and supercritical CO2. It was found that alkaline water solution in reservoir conditions causes swelling of the used rock samples in the amount of 1–3% vol. with a direct correlation between the rock swelling magnitude and the total clay content. The change in the rock volume in the presence of the used hydrocarbon-based fluid depends on the content of organic matter, its distribution in the rock, and the clay content. The observed swelling degree in the hydrocarbon fluid and CO2 was significantly lower (0–0.5% vol.) than in water. The proposed methodology and obtained results can further be used for the optimization of various operations in clay-rich formations.

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Section: Introductionmentioning

confidence: 84%

Experimental Setup for Evaluating Rock Volume Alteration and Its Application for Studying Shale Rock Swelling in Various Fluids

et al. 2022

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“…When substantiating the technology for removing ARPDs from downhole equipment operated by sucker rod deep-well pumping units, the standard methods of flushing equipment with solvents are used [111][112][113][114]. We have developed a technological scheme for preventing the formation of deposits by dosing an ARPD inhibitor in the bottomhole zone.…”

Section: Summary and Prospectsmentioning

confidence: 99%

Improving the Efficiency of Oil and Gas Wells Complicated by the Formation of Asphalt–Resin–Paraffin Deposits

2021

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A number of difficulties may be encountered in the final stages of oil field exploitation, including the formation of asphalt–resin–paraffin deposits (ARPDs). It is expedient to use complex technologies to remove the already formed deposits and prevent the formation of ARPDs. This paper focuses on the complex technology of oil field exploitation. This technology combines both the removal of organic deposits and the prevention of the formation of these deposits in the well bottomhole formation zone (BHFZ) system. The calculations for determining the process parameters of selling the ARPD inhibitor solution into the BHFZ are presented in this article. This complex technology includes the process of ARPD removal by flushing the well and the subsequent injection of the developed ARPD solvent into the BHFZ. In addition, the technology is complemented by a method of preventing the formation of these deposits. This method consists of squeezing the ARPD inhibitor and then pumping it by the selling fluid from five to ten times of the volume. This article contains a detailed calculation of the methodology and provides the diagrams for the solvent and inhibitor injection.

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“…These problems are more typical when using various types of water as an injection agent since they are subject to higher requirements for their preparation. The requirements are determined by the influence of both the composition of the rock-forming and cementing part of the reservoir, and the structural features of the pore space [16]. The lack of thorough water treatment directly affects the injectivity of injection wells.…”

Section: Literature Reviewmentioning

confidence: 99%

Strategy of water-flooding enhancement for low-permeable polymictic reservoirs

Palyanitsina¹,

Tananykhin²,

Riazi³

2021

J Appl Eng Science

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This article pays attention to the issues of increasing the efficiency of the development of oil fields with low-permeable polymictic reservoirs. It is possible to increase the efficiency of this process by improving the technology of their artificial water-flooding. This goal is being realized by identifying the features of the development of low-permeable polymictic reservoirs of fields in Western Siberia and creating a strategy to improve the technology of artificial waterflooding, taking into account the impact on the surface molecular properties of the reservoir system by the stages of their development. The developed strategy was substantiated in stages using hydrodynamic modeling. Also, an assessment was made of the effectiveness of the implementation of low-salinity waterflooding at the late stage of development of low-permeability polymictic reservoirs, the optimal time for changing the waterflooding agent from formation water to fresh water was determined.

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Peculiarities of assessing the reservoir properties of clayish reservoirs depending on the water of reservoir pressure maintenance system properties

Cited by 9 publications

References 7 publications

Experimental Setup for Evaluating Rock Volume Alteration and Its Application for Studying Shale Rock Swelling in Various Fluids

Experimental Setup for Evaluating Rock Volume Alteration and Its Application for Studying Shale Rock Swelling in Various Fluids

Improving the Efficiency of Oil and Gas Wells Complicated by the Formation of Asphalt–Resin–Paraffin Deposits

Strategy of water-flooding enhancement for low-permeable polymictic reservoirs

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