KFU. Card publication. The effect of barite drilling mud on the permeability of tight gas in cracked shales of deep wells

KAZAN
FEDERAL UNIVERSITY

- RUS
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THE EFFECT OF BARITE DRILLING MUD ON THE PERMEABILITY OF TIGHT GAS IN CRACKED SHALES OF DEEP WELLS

Form of presentation

Conference proceedings in Russian journals and collections

Year of publication

2017

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Authors, employees of KFU

Kadyrov Rail Ilgizarovich, author

Bibliographic description in the original language

Kadyrov R. The effect of barite drilling mud on the permeability of tight gas in cracked shales of deep wells // 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining. 2017. Vol. 17. P. 507–514.

Annotation

17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining

Keywords

Tight gas, deep well, drilling mud, microCT, shale

The name of the journal

17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining

URL

https://www.scopus.com/record/display.uri?eid=2-s2.0-85063079738&origin=resultslist&sort=plf-f&src=s&st1=&st2=&sid=30146c34fce707b94c8a162508567e88&sot=b&sdt=b&sl=113&s=TITLE-ABS-KEY%28THE+EFFECT+OF+BARITE+DRILLING+MUD+ON+THE+PERMEABILITY+OF+TIGHT+GAS+IN+CRACKED+SHALES+OF+DEEP+WELLS%29&relpos=0&citeCnt=0&searchTerm=

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=250602&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Kadyrov Rail Ilgizarovich	ru_RU
dc.date.accessioned	2017-01-01T00:00:00Z	ru_RU
dc.date.available	2017-01-01T00:00:00Z	ru_RU
dc.date.issued	2017	ru_RU
dc.identifier.citation	Kadyrov R. The effect of barite drilling mud on the permeability of tight gas in cracked shales of deep wells // 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining. 2017. Vol. 17. P. 507–514.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=250602&p_lang=2	ru_RU
dc.description.abstract	17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining	ru_RU
dc.description.abstract	In the conditions of depletion of traditional energy resources, the development of hard-to-recover hydrocarbon resources is becoming increasingly important in the world economy. One of these potential sources of tight gas can be in carbonate-clay fractured reservoirs of the Cambrian deposits of Kazakhstan, located at the depth of about 6 km. The reservoir rocks consist of quartz, muscovite, albite, calcite, mixed layered clays, and chlorite. It is assumed that, the deposited particles from barite mud, which are used in deep drilling, can clog the cracks, thereby blocking the gas outlet. The X-ray computed microtomography of mud-saturated shale sample has showed that the cracks width in these compacted rocks varies up to 20-25 μm, which corresponds to the size of the particles of the weighted drilling mud, as a result of significant penetration of the mud particles is not observed. Cracks, acting as a filter, pass water, but block the particles from getting inside, causing a thick crust to form up to 5 mm of drilling fluid on the surface of the reservoir in the well, which makes it difficult to escape the gas. Experimental upbuilding of 5-mm mud crust on the shale sample has led to decreasing of gas permeability from 3.182 mD to 0.418 mD. In this case, the porosity of the sample increases from 0.669% to 4.688% due to the porosity of the crust. The action on the barite mud crust of an aqueous solution of the Arten B-Solv complexing agents at a temperature of 100? C and background pressure of 20 MPa for 24 hours, almost completely dissolves the crust, partially leaving a clay fraction on the surface. As a result, the gas permeability increases to 1.166 mD, the porosity of the sample decreases to 0.331%.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Tight gas	ru_RU
dc.subject	deep well	ru_RU
dc.subject	drilling mud	ru_RU
dc.subject	microCT	ru_RU
dc.subject	shale	ru_RU
dc.title	The effect of barite drilling mud on the permeability of tight gas in cracked shales of deep wells	ru_RU
dc.type	Conference proceedings in Russian journals and collections	ru_RU