A review on quantifying the influence of lateral capillary interactions on the particle floatability and stability of particle-laden interfaces

Ma, Xiaozhen; Nguyễn, Như Gia; Nguyen, Anh V.

doi:10.1016/j.cis.2022.102731

Cited by 7 publications

(2 citation statements)

References 111 publications

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“…As shown in Figure 14, the invasion depth gradually increased with the increase of the invasion time, but the increase in amplitude gradually slowed down and finally tended to be unchanged. This is because with the invasion of the drilling fluid into the bedding fractures, the contact area between the drilling fluid and shale pores gradually increases, and the pore resistance in the invasion process becomes more and more large (Ma et al, 2022;Wang et al, 2022), which then cancels out part of the formation pressure difference that results in the gradual reduction of the driving force of drilling fluid invasion and the growth rate of invasion depth. By fitting, it was found that the invasion depth (L) of the drilling fluid is logarithmic to the invasion time (t), and the specific functional formula is L=0.4176 lnt + 0.6689.…”

Section: Figure 14mentioning

confidence: 99%

“…When the formation pressure difference is greater than 25 MPa, the invasion depth gradually tends to have a fixed value. This is because when the local pressure difference exceeds a certain value, the interfacial drag effect caused by the capillary force becomes particularly significant (Ma et al, 2022;Wang et al, 2022), and these interfacial drag effects are offset with formation pressure, so the invasion depth will not increase. The invasion depth of the drilling fluid is also logarithmic to the formation pressure difference (ΔP), and the specific functional formula is L = 0.1622 ln ΔP + 1.4282.…”

Section: Variation Law Of Invasion Depth With Formation Pressure Diff...mentioning

confidence: 99%

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The invasion law of drilling fluid along bedding fractures of shale

Wang²,

Zhang³

et al. 2023

Front. Earth Sci.

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In the process of drilling, the drilling fluid will invade into the bedding plane of shale under the action of pressure difference that will cause hydration collapse and wellbore instability. In order to ensure the wellbore stability during shale oil and gas drilling, it is necessary to clarify the invasion law of drilling fluid along bedding fractures during the drilling process. The immersion experiment method is often used to study the invasion law of drilling fluid, which is quite different from the actual invasion process of drilling fluid underground. In this paper, the depth of drilling fluid invasion into shale under different confining pressures and displacement times is intuitively and accurately determined by the displacement experiment and NMR scanning first. Also, then the mathematical relationships between drilling fluid invasion depth and invasion time, invasion pressure difference, confining pressure, bedding angle, and drilling fluid viscosity were established. The errors between the calculated values of the drilling fluid invasion depth and the experimental values were less than 15%, and the calculation accuracy was high. In addition to the influence of invasion time, formation pressure difference and confining pressure on invasion depth were researched through the method of numerical simulation. The results showed that the liquid invasion depth increased logarithmically with the increase of invasion time and formation pressure difference, but it grew slowly in the later period and tended to be stable; the invasion depth decreased exponentially with the increase of confining pressure, bedding plane angle, and drilling fluid viscosity. The results in the paper provide a basis for the subsequent determination of the collapse pressure and collapse period of bedding shale.

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Section: Figure 14mentioning

confidence: 99%

Section: Variation Law Of Invasion Depth With Formation Pressure Diff...mentioning

confidence: 99%