Features of the Well Test Interpretation in Complicated Conditions of Intensive Segregation of Phases in the Wellbore and the Manifestation of the Effects of Abnormal Pressure Growth. (Russian)

Shchurenko, Aleksandr; Arbatskii, Timur; Dadakin, Nikita; Rymarenko, Konstantin; Nukhaev, Marat; Musin, Roman

doi:10.2118/191561-18rptc-ru

SPE Russian Petroleum Technology Conference 2018

DOI: 10.2118/191561-18rptc-ru

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Features of the Well Test Interpretation in Complicated Conditions of Intensive Segregation of Phases in the Wellbore and the Manifestation of the Effects of Abnormal Pressure Growth. (Russian)

Aleksandr Shchurenko

Timur Arbatskii

Nikita Dadakin

et al.

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Cited by 2 publications

References 12 publications

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Application Rationale of Well Flow Test Complex Modules Covering Well Shut-in at the Bottomhole in terms of Eastern Siberia Carbonate Reservoirs Study

Arbatsky

Shchurenko

Dadakin

et al. 2019

Day 2 Wed, October 23, 2019

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The paper presents the experience of oil and gas exploration in the fields of the Irkutsk region. The geological features of the studied facilities dictate a practical approach and the use of compact and efficient technological solutions that can later be successfully applied to a large number of fields with similar geology. The paper highlighted an optimized complex of works on the development and testing of wells target objects in a cased wellbore, using the technology of "the well shut-off at the bottomhole". This arrangement ensures the effective implementation of work on the development of target objects and allows for high-quality registration of the bottomhole pressure dynamics. This engineering solution allows to perform a full cycle of hydrodynamical studies of well (well test) for a target interval in a relatively short time. The use of a tube bank significantly reduces the wellbore storage eand allows to obtain detailed data reliably characterizing reservoir properties and the structure of the reservoir under study. The article describes the technology of hydrodynamic studies, with the well shut-off at the bottomhole. The article deals with the research problems of highly productive, flowing facilities, with a concrete example and a detailed analysis of technological features, interpretation options, possible complications and measures for optimization. The possibility of replicating technology in various geological and technical conditions is considered.

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Application Rationale of Well Flow Test Complex Modules Covering Well Shut-in at the Bottomhole in terms of Eastern Siberia Carbonate Reservoirs Study

Arbatsky

Shchurenko

Dadakin

et al. 2019

Day 2 Wed, October 23, 2019

Self Cite

View full text Add to dashboard Cite

show abstract

A Comparison of Tidal Signal Extraction and Bourdet Smoothening for Removal of Tidal Effect Induced Artifacts in Pressure Transient Analysis

Nnamdi

Ochie

Moghanloo

2022

Day 2 Tue, August 02, 2022

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The results of pressure transient analysis (PTA) are very important in reservoir characterization; however, this analysis can be affected by some non-reservoir behavior such as gas breakthrough, phase segregation in the wellbore, tidal effects, all of which can perturb the result accuracy. When data is acquired for PTA offshore, it can contain tidal effect, causing noise which can lead to misinterpretation when the test is analyzed, hence its impact should be accounted for in the analysis. Tides are experienced as the rise and fall of sea levels due to the variation in the earth's gravitational potential exerted by the moon and the sun, and the rotation of the Earth. Tidal signals have been observed to mask late time response for pressure build up tests and will significantly hinder correct interpretation of reservoir boundaries if left unaddressed. The effects of tidal pressure signals on the pressure derivative of pressure build-up tests are studied with the aim of comprehensively exploring the deviation from expected responses given known reservoir boundary conditions. Subsequently a refined method for pure tidal component removal from pressure derivative data is presented and compared to simpler Bourdet smoothening (L) and filtration of data points used in evaluation. This work focused on an efficient method to analyze data containing tidal effects. The Bourdet derivative and log cycle filtration was effective in removing tidal signal effects on late time boundary identification with the drawback being having multiple possible interpretations of the IARF. Extracting the tidal signal gave a more defined IARF period and late time boundary effect period with only minor oscillations in the late time but the rigor of extracting the tidal signal without sufficient regional tidal information may prove to major hindrance to this process.

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Features of the Well Test Interpretation in Complicated Conditions of Intensive Segregation of Phases in the Wellbore and the Manifestation of the Effects of Abnormal Pressure Growth. (Russian)

Cited by 2 publications

References 12 publications

Application Rationale of Well Flow Test Complex Modules Covering Well Shut-in at the Bottomhole in terms of Eastern Siberia Carbonate Reservoirs Study

Application Rationale of Well Flow Test Complex Modules Covering Well Shut-in at the Bottomhole in terms of Eastern Siberia Carbonate Reservoirs Study

A Comparison of Tidal Signal Extraction and Bourdet Smoothening for Removal of Tidal Effect Induced Artifacts in Pressure Transient Analysis

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