This article presents recent developments in the field of mineralogical analyses based on X-ray computer tomography (CT). The analysis of the data obtained indicates a good repeatability of measurements, and, consequently, the possibility of using the CT method for the purpose of studying rocks during their enrichment, as well as predicting the rock behavior in the process of disintegration. Porosity parameters, particularly void density, according to CT data correlate with rock strength whereas the total porosity, which is determined from the values of mineral density, enables only an indirect estimation of the rock strength and provides no information about size, shape of pores, their connectivity and spatial orientation.
Представлен обзор основных проблем, возникающих в ходе примене ния метода компьютерной микротомографии для изучения геологических образцов. К числу рассматриваемых проблем отнесены повышение качества и пространственного разрешения томограмм, разделение минеральной матрицы на составляющие, выделение пустотного пространства, исследование заполняющего поры флюида и определение проницаемости. Описаны причины возникновения рассматриваемых проблем и предложены пути их решения на уровне пользователя-интерпретатора.
Âåñòíèê Èà Êîìè ÍÖ ÓðÎ ÐÀÍ, èþíü, 2016 ã., ¹ 6 24 ÂâåäåíèåÎäíèì èç îñíîâíûõ íåäîñòàòêîâ ðåíòãåíîâñêèõ ìèê-ðîòîìîãðàôîâ â ñðàâíåíèè ñ òîìîãðàôàìè, ðàáîòàþùè-ìè íà ñèíõðîòðîííîì èçëó÷åíèè, ÿâëÿåòñÿ îòíîñèòåëüíî íèçêîå ðàçðåøåíèå ïî ðåíòãåíîâñêîé ïëîòíîñòè. Ýòî îáóñëîâëåíî ïîëèõðîìíîñòüþ ðåíòãåíîâñêîãî èçëó÷åíèÿ òðóáêè, ñëóaeàùåé èñòî÷íèêîì èçëó÷åíèÿ. Øèðîêèé ñïåê-òðàëüíûé äèàïàçîí èñïîëüçóåìîãî èçëó÷åíèÿ ïðèâîäèò ê òîìó, ÷òî íàáëþäàåìûå íà òîìîãðàììàõ ðåíòãåíîâñêèå ïëîòíîñòè ÿâëÿþòñÿ èíòåãðàëüíûìè. Ýòî ñèëüíî çàòðóä-íÿåò ðàçäåëåíèå ìèíåðàëüíûõ ôàç, äåëàåò èõ ãðàíèöû ðàç-ìûòûìè. Êðîìå òîãî, òàêàÿ ñèòóàöèÿ ïðèâîäèò ê íåâîç-ìîaeíîñòè àíàëèòè÷åñêîãî (ïî ðàñ÷åòíîé ðåíòãåíîâñêîé ïëîòíîñòè) ðàçäåëåíèÿ íà òîìîãðàììàõ äàaeå èçâåñòíûõ ìèíåðàëüíûõ ôàç. Êàê ïðàâèëî, çàäà÷à ðàçäåëåíèÿ íà òî-ìîãðàììå ìèíåðàëüíûõ ôàç ðåøàåòñÿ ýìïèðè÷åñêè ïóòåì ñðàâíåíèÿ ñ îáðàçöàìè èçâåñòíîãî ñîñòàâà. Íî è òàêîå ðåøåíèå íå äàåò àáñîëþòíî íàäåaeíîãî ðåçóëüòàòà, èáî íà ðàñ÷åòíóþ ðåíòãåíîâñêóþ ïëîòíîñòü íà òîìîãðàììàõ îêà-çûâàþò âëèÿíèå ôîðìà è ðàçìåð (ãåîìåòðèÿ) èññëåäóåìî-ãî îáðàçöà, à òàêaeå åãî ïðîñòðàíñòâåííûå ñîîòíîøåíèÿ ñ îáúåêòàìè äðóãîé ïëîòíîñòè. Íàïðèìåð, íàáëþäàåòñÿ êà-aeóùååñÿ ñíèaeåíèå ðåíòãåíîâñêîé ïëîòíîñòè ó îáúåêòîâ, çàêëþ÷åííûõ â ðåíòãåíîïëîòíóþ ìàòðèöó, ïðè ýòîì ñíè-aeåíèå òåì ñóùåñòâåííåé, ÷åì âûøå ðåíòãåíîâñêàÿ ïëîò-íîñòü ìàòðèöû.Äëÿ îäíîðîäíûõ îáúåêòîâ ýòîò ýôôåêò â ðÿäå ñëó÷à-åâ ìîaeåò ïðîÿâèòüñÿ â ïîÿâëåíèè êàaeóùåéñÿ ðåíòãåíî-ïëîòíîé êàåìêè íà ãðàíèöå ðàçäåëà îáðàçåö/âîçäóõ (beam hardering).  ðåíòãåíîâñêèõ òîìîãðàôàõ óêàçàííûå íåäî-ñòàòêè ÷àñòè÷íî êîìïåíñèðóþòñÿ èñïîëüçîâàíèåì ôèëü-òðîâ (îáû÷íî Al, Cu, áðîíçà), êîòîðûå îòñåêàþò íèçêî-ýíåðãåòè÷åñêóþ ÷àñòü ñïåêòðà, è ïðèìåíåíèåì ìàòåìàòè-÷åñêîé îáðàáîòêè ïðè ðåêîíñòðóêöèè òîìîãðàììì (êîì-ïåíñàöèÿ "óâåëè÷åíèÿ aeåñòêîñòè" èçëó÷åíèÿ).Íåäîñòàòêîì àëþìèíèåâûõ è ìåäíûõ ôèëüòðîâ ÿâ-ëÿåòñÿ îòñå÷åíèå òîëüêî äëèííîâîëíîâîé ÷àñòè ñïåêòðà. ÓÄÊ 552.08 DOI: 10.19110/2221DOI: 10.19110/ -1381DOI: 10.19110/ -2016 ÓÂÅËÈ×ÅÍÈÅ ÐÀÇÐÅØÀÞÙÅÉ ÑÏÎÑÎÁÍÎÑÒÈ ÐÅÍÒÃÅÍÎÂÑÊÎÉ ÌÈÊÐÎÒÎÌÎÃÐÀÔÈÈ We suggest the method to increase the radiodensity resolution of the industrial microtomographes (SkyScan). The method is based on the filter with a narrow transmission spectrum (60-90 keV with 100-130 kV source voltage). The filter is composed of lead-containing glass 2.14 mm thick.Keywords: X-ray microtomography, spatial resolution, radiodensity, source voltage, filter, core sample.Îñòàâøàÿñÿ ïîñëå ôèëüòðàöèè ÷àñòü ñïåêòðà, êàê ïðàâè-ëî, õàðàêòåðèçóåòñÿ íåðàâíîìåðíî ðàñïðåäåëåííîé èíòåí-ñèâíîñòüþ è ñóùåñòâåííîé øèðèíîé (áîëåå 70 êýÂ) (ðèñ. 1).Ïðåîäîëåíèå óêàçàííûõ íåäîñòàòêîâ âîçìîaeíî, åñëè èñïîëüçîâàòü ôèëüòð-ìîíîõðîìàòîð ñ îòíîñèòåëüíî óçêîé ïîëîñîé ïðîïóñêàíèÿ ðåíòãåíîâñêîãî èçëó÷åíèÿ.  ýòîì ñëó÷àå èçëó÷åíèå áóäåò áëèaeå ê ìîíîõðîìíîìó, à êàaeó-ùèåñÿ ðåíòãåíîâñêèå ïëîòíîñòè è èõ ñîîòíîøåíèÿ íà òî-ìîãðàììàõ áëèaeå ê èñòèííûì. Ìîaeíî ïðåäïîëîaeèòü, ÷òî òàêèìè ñâîéñòâàìè îáëàäàåò ôèëüòð èç ñâèíåöñîäåðaeà-ùåãî ñòåêëà áëàãîäàðÿ õàðàêòåðíîìó ðàñïðåäåëåíèþ êî-ýôôèöèåíòà ïîãëîùåíèÿ ñâèíöà ñ ïèêîì â îáëàñòè 90 êýÂ è «îê...
Oil reservoirs are often affected by tectonic processes throughout their lifetime. Tectonic processes contribute to the impact on the formation of a number of mechanical and chemical factors. These factors change the composition and structure of the reservoir and this affects the reservoir properties of the reservoir. Deep-seated reservoirs experience a longer and more intense impact of tectonic processes. A more detailed study of the composition and properties of reservoirs for an accurate forecast of reservoir properties and their productivity potential is due to this. Standard log interpretation methods have been developed based on shallow strata. These methods do not allow taking into account secondary changes in the reservoir and make the calculations of the starting flow rates of wells reliable. J1 stratum West Wing on Nizhnevartovsky set is a prime example of this.
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