Ano ang mga pakinabang at disadvantages ng tubig - based at langis - based pagbabarena likido?

First of all, both water-based and oil-base drilling fluids have advantages and disadvantages, and they adapt to different stratigraphic conditions. Therefore, there is no superior or inferior stratum, and it is impossible to arbitrarily say which one is the future development trend. API and IADC classify the drilling fluid system into nine categories, the first seven types are water-based drilling fluid, the eighth type is oil-based drilling fluid, and the last type is gas as the basic medium. Non-dispersive system, 2, dispersive system, 3, calcium treatment system, 4, polymer system, 5, low-solid system, 6, saturated brine system, 7, well completion fluid system, 8, oil-base drilling fluid system, 9, air, fog, foam and gas system.
Water-based drilling fluid has the advantages of low cost, simple configuration, treatment and maintenance, wide source of treating agent, multiple types available for selection, easy control of performance, etc., as well as good protective effect of oil and gas layer. Oil-base drilling fluid refers to the oil as the continuous phase drilling fluid. As early as the 1920s, crude oil was used as drilling fluid to avoid and reduce the occurrence of various complicated situations in drilling. However, it is found in practice that crude oil has the following disadvantages: small shear force, difficult to suspend barite, large filtration loss, and volatile components in crude oil can easily cause fire. As a result, it gradually developed into two oil-base drilling fluids with diesel as continuous phase -- all-oil drilling fluid and water-in-oil emulsion drilling fluid. In total oil drilling fluid, water is useless component, its water content should not exceed 7%. In oil-ladle water drilling fluid, water is distributed evenly in diesel oil as the necessary component, and its water content is generally 10%~60%.
Kumpara sa water-based na pagbabarena likido, maaari oil-base pagbabarena likido sa mataas na temperatura pagtutol, paglaban sa asin, kaltsyum contamination, borehole wall katatagan, magandang kadulasan at para sa haydrokarbon reservoir pinsala ay mas maliit, at iba pang mga kalamangan, ay may ngayon maging isang drill mahirap mataas na temperatura malalim na balon, mataas Angle lihis at pahalang Wells at ang mahalagang ay nangangahulugan ng iba't-ibang mga kumplikadong pagbuo, at maaaring malawak na ginagamit para sa pagtutuklas tuluy-tuloy, perforating pagkumpleto tuluy-tuloy, workover likido at tuluy-tuloy drive puso. Gayunman, ang paghahanda gastos ng oil-base pagbabarena likido ay mas mataas kaysa sa na ng water-base pagbabarena likido, at kapag ginamit, ay madalas na maging sanhi ng malubhang epekto sa ekolohiya kapaligiran malapit sa balon site, at ang makina pagbabarena bilis ay karaniwang mas mababa kaysa sa mga water-base pagbabarena likido. Ang mga disadvantages lubhang limitahan ang pagkalat at application ng langis-base pagbabarena likido. Upang mapabuti pagbabarena rate, mababa ang gel oil package tubig emulsyon pagbabarena likido ay malawakang ginagamit mula sa kalagitnaan ng 1970s. Upang maprotektahan ang ecological kapaligiran at iakma sa mga pangangailangan ng malayo sa pampang pagbabarena, mula sa unang bahagi ng 1980s, ang mga mababang-nakakalason langis-tubig emulsyon pagbabarena likido na may mineral langis bilang ang base ng langis ay unti-unting popularized. Sa kasalukuyan, lahat-ng-langis pagbabarena likido ay ginagamit mas mababa, kaya sa pangkalahatan ay nagsasalita, ang langis-base pagbabarena likido ay tumutukoy sa water-in-langis emulsyon pagbabarena likido na may diesel langis o mababang nakakalason mineral oil (puti langis) bilang ang tuloy-tuloy na phase.
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Mag-post ng oras: Aug-09-2018

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