«Onshore and offshore oil and gas well construction»

Determination of the filtration indicator of the drilling mud taking into account the reservoir characteristics

UDC: 622.24.06
DOI: 10.33285/0130-3872-2023-3(363)-25-29

Authors:

¹ Tyumen Industrial University, Tyumen, Russia
² SurgutNIPIneft, Tyumen, Russia

Keywords: drilling fluid, filtration index, filter-press, clogging ability, pore size, well, reservoir, geological conditions

Annotation:

The article is devoted to the problems that arise during the operational determination of the filtration index, including by laboratory assistants of drilling teams, which does not allow modeling the actual characteristics of the productive reservoir and determining the clogging ability of the drilling fluid used. On the example of comparison at different magnifications of the B10 reservoir of the Vostochno-Alinskoye field in the Eastern Siberia with the YuS2 reservoir of the Russkinskoye field in the Western Siberia, the differences in the size and structure of voids are shown. The results of an electron microscopic study of the pore size of a standard paper filter and a ceramic disc are presented as well as the results of measurements of filtration indices on a filter press and a high-temperature high-pressure filter press. On the example of the drilled wells in comparable geological conditions, their flow rates during development and operation are presented, the main reason for insufficient productivity and the lack of effect from the intensification of the inflow using gas-dynamic fracturing is determined. The expediency of determining the filtration indicator on a high-temperature filter press of high pressure in front of the productive reservoir cover and the possibility, if necessary, promptly performing additional processing of the drilling fluid, is substantiated.

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