Assessment of man-made fracturing of carbonate reservoirs of the western slope of the South-Tatar arch based on the results of multi-stage hydraulic fracturing
UDC: 622.276.66
DOI: 10.33285/0130-3872-2022-3(351)-63-68
Authors:
YUNUSOV IREK M.
1,
TAKHAUTDINOV RUSTEM SH.1,
NOVIKOV MAXIM G.1,
ISLAMOV ALEKSEY I.1,
ISAEV ANATOLY A.1,
SHAIDAKOV VLADIMIR V.2,
DUMLER ELENA B.2
1 Management Company "Sheshmaoil", Almetyevsk, Russian Federation
2 Ufa State Oil Technical University, Ufa, Russian Federation
Keywords: surface seismic monitoring, man-made fracturing, South Tatar arch, multi-stage hydraulic fracturing
Annotation:
Hydraulic fracturing is fundamental in the framework of optimizing the development of carbonate reservoir reserves of the western slope of the South Tatar arch in the Republic of Tatarstan. In the context of increasing the total volume of hydraulic fracturing, respectively, initiating an increase in the share of man-made fracturing, its importance in field development is becoming more and more decisive. The article proposes a solution to the problem facing oil and gas field operators to obtain information about the nature of newly formed conductive structures, about the filtration flows of formation fluids during productive formations development. The results of the analysis of the man-made fracturing characteristics and its spatial distribution, initiated by multi-stage hydraulic fracturing (MSHF) of horizontal well ends, are presented. During the research, it was found that growth of proppant injection volume leads to an increase in the geometric dimensions of the hydraulic fracture, while to a greater extent in length and to a lesser extent in height, and the intensity of microseismic emission occurrence is correlated with proppant consumption. In the process of hydraulic fracture formation, competitive activation of the existing systems of natural fractures takes place. An increase in injection volume leads to a larger spatial coverage of the reactivation area of the existing fractures. Based on the concept of a critically stressed state of rocks massive, a network schematization of the resulting natural fracturing was made. The identified fractures can be grouped into fracture systems with conditional kinematics in accordance with the Coulomb-Anderson model as "Reverse faults" with an azimuthal angle of 146,79° (326,79°), as "Faults" directed along the azimuth angle of hydraulic fractures, as "Shifts" of north-east and west-northwest striking with the Azimuth angles of 24° (204°) and 95° (275°) respectively. The results obtained largely confirm the general nature of the spatial change in the fracture field, the reasons for its occurrence and development.
Bibliography:
1. Khisamov R.S., Gabdullin T.G., Farkhullin R.G. Kontrol' za razrabotkoy neftyanykh i gazoneftyanykh mestorozhdeniy. – Kazan': Idel'-Press, 2009. – 408 s.
2. Neftegazonosnost' Respubliki Tatarstan. Geologiya i razrabotka neftyanykh mestorozhdeniy: v 2 t. T. 2 / pod red. prof. R.Kh. Muslimova. – Kazan': Fen, 2007. – 524 s.
3. Aleksandrov V.M., Belkina V.A., Kazanskaya D.A. Tekhnologicheskiy kontrol' provedeniya mnogostadiynogo GRP s ispol'zovaniem metoda mikroseysmomonitoringa // Territoriya Neftegaz. – 2015. – № 10. – S. 16–19.
4. Mikroseysmicheskiy monitoring razvitiya treshchin GRP dlya optimizatsii meropriyatiy po povysheniyu nefteotdachi mestorozhdeniy na pozdnikh stadiyakh ekspluatatsii / Dzh.G. Le-Klive, Le-Benne, K.V. Tanner [i dr.] // Tekhnologii TEK. – 2005. – № 4. – S. 64–70.
5. Otchet o rezul'tatakh rabot po teme "Nazemnyy mikroseysmicheskiy monitoring mnogostadiynogo gidrorazryva plasta (MGRP) v skvazhine № 3475G Letnego mestorozhdeniya AO "Sheshmaoyl". – Kazan', 2019. – 202 s.
6. Otchet o rezul'tatakh rabot po teme "Nazemnyy mikroseysmicheskiy monitoring gidrorazryva plasta na skvazhinakh №№ 3292 i 3294 Severnogo neftyanogo mestorozhdeniya AO "Sheshmaoyl". – Kazan', 2020. – 110 s.
Back to issue