Ocena skuteczności oczyszczania kolumny rur okładzinowych przed cementowaniem na podstawie badań przy użyciu wiskozymetru obrotowego

Kremieniewski, Marcin; Badawczy, Instytut Nafty i Gazu – Państwowy Instytut

doi:10.18668/ng.2018.09.06

Cited by 6 publications

(7 citation statements)

References 12 publications

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“…Ze względu na pojawiający się od kilku lat problem dotyczący braku szczelności otworu po zacementowaniu zagadnienia związane z odpowiednim przygotowaniem odwiertu do cementowania są priorytetem w branży naftowej (Herman, 1995a(Herman, , 1995bUliasz i Kremieniewski, 2012;Kremieniewski i Rzepka, 2016;Kremieniewski i Stryczek, 2019). Przygotowanie otworu do cementowania to między innymi odpowiednie oczyszczenie przestrzeni pierścieniowej, dlatego też wymagane jest prowadzenie prac badawczych nad poprawą skuteczności usuwania osadu, co wymusza opracowywanie nowych technologii i metod badawczych (Stryczek i Gonet, 2005;Kremieniewski, 2018;Kremieniewski, 2019). W celu zrozumienia wpływu skuteczności oczyszczenia przestrzeni pierścieniowej na poprawę efektywności uszczelnienia otworu wiertniczego należy wspomnieć o przemianach zachodzących w otworze podczas zabiegu cementowania.…”

Section: Wprowadzenieunclassified

“…Istotne jest również oddziaływanie cieczy wiertniczych (przemywającej i buforowej) na odsłoniętą skałę poprzez utworzony na ścianie otworu osad filtracyjny zawierający koloidalne cząstki fazy stałej i polimerów. Odpowiednio zaprojektowana ciecz przemywająca powinna pozostawiać nawilżoną kolumnę rur okładzinowych oraz formację skalną -w celu poprawy wiązania zaczynu cementowego (Jasiński, 2016;Kremieniewski, 2018;Kędzierski et al, 2019). Powinna również posiadać parametry reologiczne umożliwiające wtłaczanie jej w reżimie turbulentnym -w celu poprawy skuteczności usuwania płuczki, lecz bez powodowania szczelinowania formacji skalnej.…”

Section: Wprowadzenieunclassified

“…Ponadto istotne jest możliwie łatwe usunięcie cieczy wyprzedzającej z przestrzeni pierścieniowej przez wtłaczany zaczyn cementowy. Wyniki prac doświadczalnych pozwalają wnioskować, że jakość i ilość pozostawionego na ścianie otworu osadu płuczkowego znacząco wpływa na efektywność uszczelnienia kolumny rur (Kremieniewski, 2018(Kremieniewski, , 2020b. Wiąże się to z faktem, że przemywki wykazują właściwości reologiczne cieczy newtonowskich i powodują dyspergowanie płuczki.…”

Section: Wprowadzenieunclassified

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Porównanie wyników metod pomiaru skuteczności usuwania osadu płuczkowego

Kremieniewski

Badawczy²

2021

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The proper cleaning of the annular space before cementing is one of the most important factors affecting the proper sealing of the casing column. Inadequate or incomplete removal of the mud cake or residues of the mud may result in the formation of uncontrolled gas outflows (migration or exhalation) at the contact of the cement sheath with the rock formation and with the surface of run-down casing. It is related to the lack of compatibility in the contact of the mud and the cement. Additionally, the lack of proper cleaning of the annular space will reduce the adhesion value of the cement sheath to the contact surface. The result of the above may be the lack of adequate stabilization of the column of pipes due to its weakened connection in the lower part with the wall, and in the upper part with the previous column of larger diameter pipes. Therefore, to improve both the tightness of the borehole as well as the quality of the cementation condition, laboratory tests of the efficiency of cleaning the annular space are carried out by measuring the efficiency of washing mud removal. So far, measuring the efficiency of mud removal or the effect of washing utilization have been done using a rotary viscometer. During the test, a mud cake is produced on the rotor surface and then removed with washing liquid. Recently, the Oil and Gas Institute – National Research Institute developed a new method for measuring the efficiency of drilling mud removal by using a newly developed drilling fluid flow simulator (Patent P.423842). The device enables the simulation of the drilling fluid flow (drilling fluid, washing fluid, spacer) in the simulated annular space. It is possible to select the parameters of the flow (delivery rate) and the contact time of the liquid with the tested surface. Due to the different measurement principles during the tests with the viscometer and the simulator, it was decided to conduct a comparison and determine the degree of convergence of the discussed methods. The same rinsing liquids were tested to remove the same type of mud, but using different measurement methods. The obtained values of mud removal efficiency were subjected to the correlation analysis, which made it possible to compare the results of the analyzed measurement methods.

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Section: Wprowadzenieunclassified

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Porównanie wyników metod pomiaru skuteczności usuwania osadu płuczkowego

Kremieniewski

Badawczy²

2021

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“…The issue of washing the annular space covers many scientific aspects. These are the rheology of drilling fluids, fluid mechanics, the action of chemicals (surfactants), and the action of chemical additives during cement slurry hydration [3][4][5][6][7]. The development of techniques and technology has not yet made significant progress in improving well bonding.…”

Section: Introductionmentioning

confidence: 99%

“…Most often, the quality and the quantity of the mud cake left on the opening wall deteriorate the sealing efficiency of the pipe column. Therefore, the most important step is thorough washing of the annular space before the cementation procedure [1,2,5,7,10,[28][29][30]. In addition, the issue that affects the quality of sealing the annular space is the adhesion of the hardened cement slurry to the rock through the remains of the remaining mud cake.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Washer Fluid for Primary Cementing

Kremieniewski

2021

Energies

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This article presents the results on the basis of which a new hybrid drilling washer fluid was designed. The use of fluid from such a drilling washer increases the mud-cake removal efficiency. Its operation is based on both chemical and mechanical removal of the mud cake. This article presents a group of agents and admixtures of various solid fractions, the appropriate selection of which enabled the design of a hybrid drilling washer fluid. The liquid has much better washing parameters than the drilling washers used so far. The tests were carried out in a drilling fluid flow simulator. A significant improvement in the scrubbing mud-cake removal efficiency resulted from the action of surfactants and fine-grained abrasive additives. Their proper concentration was also very important. The hybrid drilling washer fluid was designed on the basis of tests measuring the adhesion of the hardened cement slurry to the rock from which the previously produced mud was removed. In this way, the effectiveness of the washing liquids was determined. Upon analyzing the obtained results and correlating them with the reference samples, one can see a significant improvement in the efficiency of the removal of the drilling sediment by the hybrid drilling washer fluid. The hybrid drilling washer fluid is an innovative solution because it combines chemical and mechanical action in the removal of drilling fluid. Additionally, such a washing liquid has not been used so far.

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Comparison of Efficient Ways of Mud Cake Removal from Casing Surface with Traditional and New Agents

et al. 2021

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The tightness of the casing-rock formation interface is one of the most important elements of drilling and cementing jobs. In the absence of the required tightness, there is a risk of gas migration directly to the ground, groundwater or atmosphere. In order to eliminate this type of uncontrollable and unfavorable gas flows, the casing column is sealed with cement slurry in the annular space or beyond casing. Cement slurry displaces mud present in the annular space, although the mud cake cannot be completely removed, which is required for obtaining proper binding of cement slurry with the casing surface and the surface of the drilled formation. Therefore, it is important to prepare the well and remove the mud cake from the annular space with spacer fluid. An occasional lack of wellbore tightness requires continuous improvement of the cementing technology. Accordingly, analyses are conducted on mud cake removal with modified or new spacer fluids. Properly designed fluid should efficiently clean the surface of the casing and of the rock mass. One of the basic measurements is the analysis of the efficiency of mud cake removal from the surface of a rotational viscometer. The efficiency of traditional and newly designed fluids for mud cake removal from the casing surface with new and traditional agents has been compared further in this paper. The methodology of mud cake removal with the use of a rotational viscometer was also presented. Tests were performed for various concentrations of agents already used for spacer fluids and for a group of new agents. The efficiency of annular space cleaning was determined on the basis of a comparison with the results obtained for the reference sample, i.e., water which was used for mud cake removal from the rotor surface. The analysis of the results of experiments created bases for the comparison of the efficiency of the analyzed spacer fluids and finding the most suitable ones for mud cake removal from casing columns.

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Ocena skuteczności oczyszczania kolumny rur okładzinowych przed cementowaniem na podstawie badań przy użyciu wiskozymetru obrotowego

Cited by 6 publications

References 12 publications

Porównanie wyników metod pomiaru skuteczności usuwania osadu płuczkowego

Porównanie wyników metod pomiaru skuteczności usuwania osadu płuczkowego

Hybrid Washer Fluid for Primary Cementing

Comparison of Efficient Ways of Mud Cake Removal from Casing Surface with Traditional and New Agents

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