Gravel Pack Evaluation

Neal, M.R.

doi:10.2118/11232-pa

Cited by 10 publications

(3 citation statements)

References 1 publication

(1 reference statement)

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“…Установка гравийных фильтров. Закачивание крупнозернистого кварцевого песка помогает сдерживать мехпримеси на скважинах с открытым забоем [35,36,[37][38][39][40].…”

Section: исследование методов борьбы с пескопроявлениями и техник наunclassified

Study of Gas Wells Operation Regimes in Complicated Conditions

Popov¹,

Petrakov²

2021

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The influence of reservoir rock properties on sand production in wells is considered. It was concluded that the rock should be considered rather not from the point of view of its strength, but from the point of view of the type of cementitious substance and its distribution. When predicting sand production, it is necessary to take into account the internal stresses of the rocks, as well as the change in these stresses during drilling, perforation and operation of the formation due to the violation of their initial state. Within the framework of this work, an analysis of the main causes of sand production during the operation of gas wells and the negative consequences of sand production for gas production equipment is presented. It has been established that water breakthrough, formation depletion, pressure drop at the bottom of the wells due to their frequent shutdown are the main prerequisites for the removal of sand from the bottomhole formation zone. Sand production is associated with such negative consequences as plugging in wells, erosion of underground and surface equipment, collapse of the top of the bottomhole formation zone and production strings. The main technologies for the prevention and elimination of accidents associated with the removal of mechanical particles from the reservoir are considered. Based on the research results, an algorithm was proposed for selecting technological modes of well operation in conditions of water and sand. The parameters for choosing the optimal operating mode of a gas well are substantiated, in which sand is not extracted with the subsequent disabling of downhole and wellhead equipment, the integrity of the bottomhole zone is not violated, and the well is not selfcontained. The results obtained can be applied to improve the efficiency of gas wells operation and predict their trouble-free operation.

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Section: исследование методов борьбы с пескопроявлениями и техник наunclassified

Study of Gas Wells Operation Regimes in Complicated Conditions

Popov¹,

Petrakov²

2021

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“…Particularly for long horizontal wells in loosely consolidated sands, the design of sand control completions has to strike the best trade-off between maximizing the protection against sand production and minimizing the impact on productivity, both initially and through the life of production. While optimization of this technology either by laboratory studies or through computational simulations has been the subject of many studies over the last decades (Gurley et al, 1977) and is still actively investigated today (Becker and Gardiner, 2000;Blok et al, 2000;Hilbert et al, 2011;Jain et al, 2011;Martins et al, 2005;Navaira et al, 2009;Neal, 1983;Oyeneyin, 1987;Suri and Sharma, 2010), the current design of screens and supporting tubing (basepipe) in a sand control completion are based on empirical pressure drop correlations that are developed for the individual elements, but not for the entire sand control assembly. Yet, the complexity of the geometry (illustrated in Figure 1 for a gravel pack completion) implies the complexity of the flow whereas the total pressure drop from the formation to the well is, in general, different from the sum of the individual components.…”

Section: Gravel Pack -Introductionmentioning

confidence: 99%

Simulation and Visualization of Near-Well Flow

et al. 2012

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The ability to understand and optimize the exact circumstances by which fluids enter the wellbore is increasingly crucial to achieving effective and economic production. The well completion, the connection to the reservoir, must be designed and operated in accordance with the true physics of the near well flow environment. The ability to visualize such flows, then parameterize and extrapolate the results with realistic simulation models, affords a powerful advantage in creating well completions that are simple to install, reliable to operate, and, of course, deliver all the flow the reservoir is capable of yielding. This paper illustrates the use of advanced visualization in this process. Two examples are presented, featuring detailed images of flow through complex sand control completions hardware (gravel pack) and of flow through wormholes in acid-stimulated carbonate rock.

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“…First attempt to evaluate the pack efficiency quantitatively was done by Mark Neal (1982) by using conventional Neutron tool. The concept was to see the change in porosity in the annular space between the casing and screen due to the placement of gravel.…”

Section: Introductionmentioning

confidence: 99%