WO2010068137A1 - Procédé de fracturation hydraulique d’une formation sous-terraine - Google Patents

Procédé de fracturation hydraulique d’une formation sous-terraine Download PDF

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Publication number
WO2010068137A1
WO2010068137A1 PCT/RU2009/000529 RU2009000529W WO2010068137A1 WO 2010068137 A1 WO2010068137 A1 WO 2010068137A1 RU 2009000529 W RU2009000529 W RU 2009000529W WO 2010068137 A1 WO2010068137 A1 WO 2010068137A1
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WO
WIPO (PCT)
Prior art keywords
proppant
particles
hydraulic fracturing
migration
underground formation
Prior art date
Application number
PCT/RU2009/000529
Other languages
English (en)
Russian (ru)
Inventor
Наталья Анатольевна ЛЕБЕДЕВА
Андрей Александрович ОСИПЦОВ
Эдуард СИБРИЦ
Original Assignee
Шлюмберже Холдингс Лимитед
Шлюмберже Текнолоджи Б.В.
Шлюмберже Канада Лимитед
Сервисес Петролиерс Шлюмберже
Прад Рисеч Энд Девелопмент Лимитед
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Filing date
Publication date
Application filed by Шлюмберже Холдингс Лимитед, Шлюмберже Текнолоджи Б.В., Шлюмберже Канада Лимитед, Сервисес Петролиерс Шлюмберже, Прад Рисеч Энд Девелопмент Лимитед filed Critical Шлюмберже Холдингс Лимитед
Publication of WO2010068137A1 publication Critical patent/WO2010068137A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/25—Methods for stimulating production
    • E21B43/26—Methods for stimulating production by forming crevices or fractures
    • E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping

Definitions

  • the present invention relates to the field of hydraulic fracturing in subterranean formations and, in particular, to a method for optimizing the lateral migration of proppant particles as it moves along a fracture.
  • Hydraulic fracturing is the main technological process of increasing the permeability of the bottomhole zone of the reservoir due to the formation of cracks or the expansion and deepening of natural cracks in it.
  • hydraulic fracturing fluid is pumped into the wellbore crossing the subterranean formation under high pressure. Deposits or rocks are forced to crack and rupture.
  • the proppant is pumped into the fracture to prevent the fracture from closing after relieving pressure on the formation, and thereby to provide improved production of recoverable fluid, i.e., oil, gas, or water.
  • the proppant is used to hold the walls of the fracture apart from each other to create a conductive channel in the wellbore.
  • the proppant particles Along with the transport of proppant particles along the crack, there is also a transverse migration of particles, leading to an uneven distribution of the proppant across the flow.
  • a number of reasons affect the appearance of the transverse motion of particles in a crack: the presence of channel walls, the deposition of particles on the bottom of the crack, the heterogeneity of the transverse profile of the velocity of the carrier flow, and the non-zero velocity of the particles to slip relative to the fluid.
  • US Pat. No. 7,299,875 proposed a method for fracturing an underground field portion with the ability to control particle movement.
  • This method involves the interaction of an underground field site with a flushing fluid; the interaction of the underground field with the hardening fluid, including resin and aqueous solutions, and the interaction of the underground field with the fracturing fluid under pressure sufficient to create or increase a gap in the soil.
  • Patent WO2007086771 proposes methods for forming proppant clusters or islands in a fracture and free channels for fluid flow between them.
  • US Pat. No. 4,478,282 describes a method for fracturing an underground field discovered by a well. The essence of the method is that first a portion of hydraulic fracturing fluid is pumped into the field, then a liquid phase without proppant containing a transporting fluid and a blocking material.
  • This material consists of sand and quartz flour, the particle size of which is 10-20, 20-40 and 100 cells for sand 200 for quartz flour. At the last stage, the proppant enriched slurry is pumped.
  • the technical result of the present invention is to optimize the lateral migration of proppant particles during injection, preventing uneven distribution of the proppant across the flow.
  • the method of hydraulic fracturing of an underground formation involves injecting into the fracture created in the formation a hydraulic fracturing fluid containing proppant particles, using hydraulic fracturing fluid and / or proppant having properties that optimize the speed of lateral migration of proppant particles during proppant flow along the crack during the injection process.
  • hydraulic fracturing fluid and / or proppant are used, with properties that allow rapid transverse migration of proppant particles during proppant flow along a fracture in a subterranean formation during injection to form a concentrated vertical layer of particles in the middle of the fracture.
  • hydraulic fracturing fluid and / or proppant are used, with properties that allow for a slow transverse migration of proppant particles as the proppant flows along cracks in the subterranean formation during the injection process with a uniform distribution of particles in the transverse direction.
  • hydraulic fracturing fluid with a viscosity of less than 0.01 Pa-s can be used.
  • a proppant with particles larger than 0.3 mm can be used.
  • a proppant with a density of more than 1500 kg / m 3 can be used.
  • a proppant with a density of less than 900 kg / m 3 can be used.
  • hydraulic fracturing fluid with a viscosity of more than 0.2 Pa-s can be used.
  • a proppant with particles smaller than 0.08 mm can be used.
  • a proppant with a density in the range between 900 kg / m 3 and 1100 kg / m 3 can be used.
  • FIG. 1 is a graph of the characteristic longitudinal size of the transverse particle migration as a function of the particle radius of the proppant
  • FIG. 2 is a graph of the characteristic longitudinal size of the transverse particle migration as a function of proppant material density
  • FIG. 3 is a graph of the characteristic longitudinal size of the transverse particle migration as a function of the fracturing fluid viscosity
  • FIG. 4 illustrates the process of rapid transverse migration of a proppant to the center of a crack to form a concentrated layer of particles
  • FIG. 5 illustrates the process of slow transverse migration of a proppant when the impurity is uniformly distributed in the transverse direction.
  • the present invention makes it possible to pre-set the rate of transverse migration of proppant particles during transport along the crack during the injection process and thereby optimize the transverse migration of particles by first selecting the fracturing fluid viscosity, proppant density or particle size, or all three parameters together.
  • An increase in the viscosity of a liquid a decrease in the density or size of particles leads to a slow transverse migration.
  • an increase in the density and size of the agent a decrease in the viscosity of the liquid leads to rapid transverse migration.
  • Slow lateral movement of particles can be useful to ensure uniform distribution of particles across the crack, which avoids the formation of a concentrated layer of particles on the midline of the crack, thereby avoiding unwanted rapid precipitation of particles.
  • rapid migration leads to the formation of a concentrated layer of particles in the middle of the crack, which helps to avoid unwanted clogging of the crack (arching).
  • the injection into the subterranean formation of a fracturing fluid mixed with a proppant provides longitudinal movement of proppant particles along the fracture.
  • the process of transport of the agent (particles) in the crack is accompanied by the migration of particles in the transverse direction.
  • This transverse flow is explained by a number of reasons: the presence of the channel walls, the possibility of precipitation of particles in the sediment, the heterogeneity of the velocity of the carrier flow, as well as the slipping of particles.
  • To characterize the transverse flow process we introduce a longitudinal length over which the transverse migration of the impurity occurs. This is a characteristic linear dimension along the crack, at which particles move in the transverse direction by a distance comparable in order of magnitude to the width of the crack. In the case of slow (fast) particle migration, the characteristic longitudinal migration length is large (small) compared to the crack length.
  • FIG. 4 and 5 show the processes of fast and slow transverse migration of proppant particles, respectively, where 1 is the borehole, 2 is the fracture, 3 is the proppant.
  • the proppant 3 If the lateral migration of particles develops rapidly (the characteristic longitudinal migration length is small), then the proppant 3 accumulates near the center of the crack 2, forming a narrow vertical layer with a high concentration of particles (Fig. 4). Such a flow leads to an increase in the deposition rate of the proppant and to an increase in sediment growth. On the other hand, the presence of a narrow zone with a high particle concentration avoids unwanted clogging (arching in the granular material of particles) and stopping crack growth (end-shielding effect).
  • the present invention provides a method for optimizing the lateral migration of proppant particles when moving along a fracture by first selecting the properties of the fracturing fluid and / or proppant.
  • the transverse migration of particles can accelerate or slow down.
  • the characteristic longitudinal size of the transverse migration of particles is directly proportional to the viscosity of the fracturing fluid, inversely proportional to the size of the proppant particles, and inversely proportional to the absolute value of the difference between the density of the agent and the density of the fluid.
  • the graphs in FIG. 1-3 show the relationship between the characteristic longitudinal size and hydraulic fracturing viscosity, material density and proppant particle size. For a crack with a width of 0.01 m and a fracturing fluid velocity OD m / s in FIG.
  • FIG. 1 shows a graph of the characteristic longitudinal size L of the transverse particle migration as a function of the radius ⁇ of the proppant particle; the viscosity of the fracturing fluid is 0.01 Pa-s, the density of the particles of the fracturing fluid is 1000 kg / m 3 , the particle density of the proppant is 2600 kg / m 3 .
  • Figure 2 shows a graph of the characteristic longitudinal size L of the transverse migration of particles depending on the density p ° of the material of the proppant; the viscosity of the fracturing fluid is 0.01 Pa-s, the particle density of the fracturing fluid is 1000 kg / m 3 , the size of the proppant is 0.5 mm.
  • Fig.3 shows a graph of the characteristic longitudinal size L of the transverse migration of particles depending on the viscosity ⁇ of the fracturing fluid; the viscosity of the fracturing fluid is 1000 Pa-s, the particle density proppant agent - 2600 kg / m 3 , the particle size of the proppant is 0.5 mm
  • the viscosity range of the fracturing fluid and the values of other determining parameters providing the proppant transport along the crack with a slow transverse particle migration are given.
  • the density of proppant particles is 2600 kg / m 3
  • the density of the fracturing fluid 1000 kg / m 3
  • the density of the fracturing fluid 1000 kg / m 3
  • the range of the density of the material of the proppant agent particles and the values of other determining parameters providing the proppant transport along the crack with rapid transverse migration are given.
  • the density of the fracturing fluid 1000 kg / m 3
  • Proppant particle size 0.5 mm
  • the example shows the range of particle sizes of the proppant and the values of other determining parameters that ensure the transport of impurities along the crack with a slow transverse particle migration.
  • the density of the fracturing fluid 1000 kg / m 3
  • the example shows the range of particle sizes of the proppant and the values of other determining parameters that ensure the transport of impurities along the crack with rapid transverse migration.
  • the density of the fracturing fluid 1000 kg / m 3
  • Proppant particle radius 0.3 - 1 mm

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

L’invention concerne le domaine de la fracturation hydraulique dans des formations sous-terraines. Le procédé de fracturation hydraulique d’une formation sous-terraine prévoit l’injection par pompage via une fissure créée dans la formation d’un liquide de fracturation hydraulique contenant des particules d’un agent de soutènement. On utilise un liquide de fracturation hydraulique et/ou d’un agent de soutènement qui manifeste des propriétés assurant l’accélération ou le ralentissement de la migration transversale des particules d’agent de soutènement le long de la fissure pendant l’injection.
PCT/RU2009/000529 2008-12-10 2009-10-09 Procédé de fracturation hydraulique d’une formation sous-terraine WO2010068137A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2008140626/03A RU2008140626A (ru) 2008-12-10 2008-12-10 Способ гидроразрыва подземного пласта
RU2008140626 2008-12-10

Publications (1)

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WO2010068137A1 true WO2010068137A1 (fr) 2010-06-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012064213A1 (fr) * 2010-11-12 2012-05-18 Schlumberger Canada Limited Procédé d'amélioration de pontage des fibres

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143715A (en) * 1977-03-28 1979-03-13 The Dow Chemical Company Method for bringing a well under control
US4509598A (en) * 1983-03-25 1985-04-09 The Dow Chemical Company Fracturing fluids containing bouyant inorganic diverting agent and method of use in hydraulic fracturing of subterranean formations
US5964289A (en) * 1997-01-14 1999-10-12 Hill; Gilman A. Multiple zone well completion method and apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143715A (en) * 1977-03-28 1979-03-13 The Dow Chemical Company Method for bringing a well under control
US4509598A (en) * 1983-03-25 1985-04-09 The Dow Chemical Company Fracturing fluids containing bouyant inorganic diverting agent and method of use in hydraulic fracturing of subterranean formations
US5964289A (en) * 1997-01-14 1999-10-12 Hill; Gilman A. Multiple zone well completion method and apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012064213A1 (fr) * 2010-11-12 2012-05-18 Schlumberger Canada Limited Procédé d'amélioration de pontage des fibres
CN103249909A (zh) * 2010-11-12 2013-08-14 普拉德研究及开发股份有限公司 增强纤维衔接的方法
RU2569386C2 (ru) * 2010-11-12 2015-11-27 Шлюмбергер Текнолоджи Б.В. Способ улучшения волоконного тампонирования
US9663706B2 (en) 2010-11-12 2017-05-30 Schlumberger Technology Corporation Method to enhance fiber bridging
CN103249909B (zh) * 2010-11-12 2017-06-06 普拉德研究及开发股份有限公司 增强纤维衔接的方法

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