Rock-Drilling Fluid Interaction Studies on the Diffusion Cell

Muniz, Eudes Siqueira; Fontoura, S. A. B.; Lomba, R.F.T.

doi:10.2523/94768-ms

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…Determining the size of small pores of shales by the conventional methods, such as mercury injection, has some limitations because of pore accessibility and conformance. − Various imaging techniques have been recently used for visualizing the distribution of minerals, organic material, and pores at the sub-micrometer scale. , Figure shows the conventional SEM images of the five samples. If we interpret the dark spots to be the void space, pores in the order of 100 nm are visible in all of the samples.…”

Section: Resultsmentioning

confidence: 99%

Liquid Intake of Organic Shales

et al. 2012

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Organic shales are exposed to treatment fluids during and after hydraulic fracturing operations. The fluid–shale interaction influences the petrophysical alteration of the fractured shale and the fate of the fracturing fluid. We systematically measured the spontaneous water and oil intake of five shale samples collected from the cores of two wells drilled in the Horn River basin. The samples represent three shale formations with different mineralogy and petrophysical properties. We characterize the samples by measuring the porosity, conducting X-ray diffraction, and interpreting the well logging data and scanning electron microscopy images. The water intake is higher than the oil intake for all samples. The excess water intake and the physical alteration degree correlate with the shale mineralogy and petrophysical properties. The ratio between the water and oil intake is much higher than the ratio between the water and oil capillary pressures, even for the non-swelling shales. The comparative study indicates that the water intake of organic shales is controlled by both adsorption and capillarity.

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Section: Resultsmentioning

confidence: 99%

Liquid Intake of Organic Shales

et al. 2012

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Reducing Torque and Drag in Extended-Reach Wells Using Thermoplastic Polymers for Protective Sliding Rings

El Sabeh,

Pašić,

Mijić

et al. 2024

Applied Sciences

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Extended-reach drilling represents an advanced way of drilling and accessing reservoirs that were previously economically not feasible to drain, impossible to reach or in an environmentally sensitive area. One of the main issues that appears while drilling such wells is caused by the high values of friction factor which cause high values of torque and drag. One of the suggested solutions is to use a protective sliding ring made from materials such as POM, Teflon and PA6 in combination with lubricants added to a polymer mud system. First, measurements were conducted on a lubricity tester to choose the best material and, after finishing, a mechanical wear test was conducted on a specially designed device to measure mechanical wear. Results showed that Teflon showed lower values of friction factor in comparison to steel and the mechanical wear was minimal. The lowest value of friction force was recorded for blocks made from Teflon in tested mud systems. It is also noticeable that, in polymer mud with weighting additives and lubricant, the value of the friction force is higher than in polymer mud with lubricant only.

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Rock-Drilling Fluid Interaction Studies on the Diffusion Cell

Cited by 2 publications

References 11 publications

Liquid Intake of Organic Shales

Liquid Intake of Organic Shales

Reducing Torque and Drag in Extended-Reach Wells Using Thermoplastic Polymers for Protective Sliding Rings

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