Open-hole multistage hydraulic fracturing system

Serdyukov, S. V.; Degtyareva, Natalia; Patutin, A. V.; Shilova, T. V.

doi:10.1134/s1062739116061759

Cited by 10 publications

(4 citation statements)

References 3 publications

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“…It can be seen from expressions (10) that the stresses along the perforation hole wall vary depending on the distance from the well wall.…”

Section: Stresses In the Vicinity Of An Open-hole Vertical Wellmentioning

confidence: 99%

“…Stress near a perforation in an open well. It is shown that stresses along the perforation surface in an open well vary depending on the distance from the well axis according to expressions (8)- (10). They are maximum near the well wall and minimum near the hole tip.…”

Section: Stresses In the Vicinity Of An Open-hole Vertical Wellmentioning

confidence: 99%

“…Figure 4, c shows the program for specimen testing, built on the basis of formulas (10). The stresses s1, s2, s3 plotted in it correspond to the absolute values of the stresses sz′, sφ′, sz′ acting in the vicinity of the perforation.…”

Section: Stresses In the Vicinity Of An Open-hole Vertical Wellmentioning

confidence: 99%

“…Figure 5, a shows that when modelling the pressure drop in the perforation vicinity in an open well, the specimen was elastically deformed to a stress of s2 = 120 MPa, and then its inelastic deformation began and the specimen was destroyed at s2 = 126 MPa. Since the stress s2 applied to the specimen in the loading block of the TILTS corresponds to the absolute value of the hoop stress |s′| in the perforation vicinity, then from expression (10) we have pw = |q| -(25/98)s2. Accordingly, the beginning of inelastic deformation of the specimen corresponds to the pressure at the bottom of the well pw = 9.6 MPa, and the destruction of the specimen corresponds to the pressure pw = 8.1 MPa.…”

Section: Stresses In the Vicinity Of An Open-hole Vertical Wellmentioning

confidence: 99%

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Определение Параметров Метода Направленной Разгрузки Пласта На Основе Физического Моделирования На Установке Истинно Трехосного Нагружения

Karev

Коваленко

Khimulia

et al. 2022

PMI

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The article presents a theoretical and experimental substantiation of the method of directional unloading of the reservoir in fields with low-permeability reservoirs. The relevance of the article is due to the reduction of hydrocarbon resources in modern conditions and the need to create new efficient environmentally friendly technologies to develop hydrocarbon deposits with hard-to-recover reserves, primarily with low-permeability reservoirs. The results of a theoretical study of the stress-strain state in the vicinity of a well, both cased and open, are presented. They are necessary to develop programs for laboratory testing of core specimens from the studied fields. A technique for physical modelling of deformation processes in the bottomhole zone with a decrease in pressure at the well bottom in a true triaxial loading unit is described in order to determine the parameters of the process impact on the formation reservoir, leading to an increase in well productivity. The method was applied to the conditions of the low-permeability reservoir at the Verkhneviluchanskoye oil and gas condensate field in the southwest of the Republic of Sakha (Yakutia). Expe-rimental studies were carried out on a unique scientific unit for true triaxial loading, created at the IPMech RAS, the Triaxial Independent Loading Test System. The directional unloading method was adapted for the studied field, the process parameters of successful application of the method were determined: the bottomhole design, the drawdown values necessary to increase the permeability of the bottomhole formation zone.

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“…It can be seen from expressions (10) that the stresses along the perforation hole wall vary depending on the distance from the well wall.…”

Section: Stresses In the Vicinity Of An Open-hole Vertical Wellmentioning

confidence: 99%

Section: Stresses In the Vicinity Of An Open-hole Vertical Wellmentioning

confidence: 99%

Section: Stresses In the Vicinity Of An Open-hole Vertical Wellmentioning

confidence: 99%

Section: Stresses In the Vicinity Of An Open-hole Vertical Wellmentioning

confidence: 99%

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