WO2020102870A1 - Procédé de stimulation de puits de pétrole - Google Patents

Procédé de stimulation de puits de pétrole

Info

Publication number
WO2020102870A1
WO2020102870A1 PCT/BR2019/050490 BR2019050490W WO2020102870A1 WO 2020102870 A1 WO2020102870 A1 WO 2020102870A1 BR 2019050490 W BR2019050490 W BR 2019050490W WO 2020102870 A1 WO2020102870 A1 WO 2020102870A1
Authority
WO
WIPO (PCT)
Prior art keywords
acid
laser
well
stimulation
process according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/BR2019/050490
Other languages
English (en)
Portuguese (pt)
Inventor
Mario GERMINO FERREIRA DA SILVA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Petroleo Brasileiro SA Petrobras
Original Assignee
Petroleo Brasileiro SA Petrobras
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from BR102018073768-6A external-priority patent/BR102018073768B1/pt
Application filed by Petroleo Brasileiro SA Petrobras filed Critical Petroleo Brasileiro SA Petrobras
Publication of WO2020102870A1 publication Critical patent/WO2020102870A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
    • E21B43/2405—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection in association with fracturing or crevice forming processes

Definitions

  • the present invention relates to a process for stimulating oil wells. More specifically, the present invention suggests a process that increases the productivity of drilled wells using laser acidification for oil well operations.
  • the reduction in the production of a well may be associated with a drop in the permeability of the rock, which can be caused by incrustations and / or precipitations.
  • This reduction in the original permeability in the region close to the well is known as "damage", which can be caused by any operation where there is fluid contact with the formation.
  • operations called “stimulation operations” are necessary, which are activities that aim to increase the productivity or injectivity rate of a well.
  • Well stimulation can be applied as an alternative to secondary recovery, and it can act simultaneously or not, to increase the hydrocarbon recovery rate in a deposit.
  • the main methods of stimulating wells are acidification and hydraulic fracturing.
  • the main difference between the two treatments is that acidification treats the matrix, in order to restore the original permeability of the rock that is damaged for some reason, while hydraulic fracturing is applied most often in low permeability formations, where the productivity should be improved rather than restored.
  • acidification consists of the injection of an acidic solution in order to increase the productivity of the well. This technique is generally used to restore the permeability of regions that have been altered due to damage during the drilling stages, completion or production, where particles block the passage of fluid, reducing the productivity of a well. In carbonate formations, in addition to removing the damage, acidification also acts by increasing the connectivity of existing channels and in the formation of new channels, which are called “wormholes”.
  • cannons are carried out using cannons lowered with the use of explosives designed for this purpose, and the tunnels formed are limited to the capacity of the explosive charge used in the cannons.
  • the acid pumped to the well will cool, so that the acid will arrive cold in front of the formation due to the heat exchange of the riser with the sea, since, in water depths from 700 m deep, the water temperature in the seabed becomes 4 ° C.
  • the laser stimulation processes are a viable alternative for the stimulation of oil wells, being effective in increasing the temperature of the formation, which would make the action of the injected acid feasible in formations that are in water layers from 700 m deep.
  • WO2011 / 008544 A2 is directing a method for drilling, completing and / or stimulating an oil well that involves the use of laser to form selected orientation opening in the well wall, based on the characteristics of formation.
  • acids are often used in underground environments due to their ability to dissolve and remove unwanted materials or objects.
  • this document refers to the fact that the acid used is translucent, that is, it does not prevent it from being crossed by the laser, so there is no evidence that a local reaction has occurred.
  • document W02017 / 100354 AI discloses a method to improve the production of hydrocarbons from an underground reservoir, which involves reducing the viscosity and increasing the hydrocarbon production of the reservoir.
  • this document describes that, by one of the known methods of radial drilling, which are made separately, they are used to create a tunnel in order to inject steam, aiming at heating the reservoir, and the acid is used to create the channels where the steam will be injected. Therefore, there is no evidence that a local reaction occurs when the steam is injected.
  • the present invention is related to the stimulation of oil wells to increase the production of oil and / or gas.
  • a first objective of the present invention is to develop an oil well stimulation process that increases the productivity of drilled wells using laser acidification for oil well operations.
  • the present invention seeks to carry out the joint use of acid and laser cannon, sequentially and / or simultaneously, which will allow the thermal catalysis of the reaction and the increase of the acid temperature, which makes the acid consume the rock more quickly.
  • the heat generated by the laser will thermally catalyze the reactions listed below.
  • the heating of the acid promoted by the laser would lead to an increase in the reaction kinetics and, therefore, to an increase in the efficiency of the acid treatment, leading to an increase in the efficiency of creating “preferential paths” (wormholes) for the oil and / or gas (s) present in the formation, which makes the cannons operation faster.
  • the acid used in the process according to the present invention could achieve a deeper penetration in the carbonate rocks, thus increasing the connectivity of the regions furthest from the reservoir to the well through the created channels, as well as the reservoir area. exposed to the flow. This improves the stimulation of the well, thus generating an increase in the productivity index (IP) of the well, which leads to an increase in the production flow of the well.
  • IP productivity index
  • the set of characteristics of the present invention allows, through the joint application of acid and laser, the thermal catalysis of the reaction between the acid and the laser to increase the acid temperature, and by the application of the laser thermal radiation, reacting more fast and consuming more carbonate rock.
  • the present invention reaches a level of enlargement of the area open to flow, by increasing the diameter and length achieved by the joint action of acid and laser, by the ease of increasing the amount of cannon and / or cuts made in the rock, very superior to the conventional acidification technique.
  • This innovation can be applied in the development of the production of the pre-salt fields and all scenarios where the formation consists of carbonate rocks.
  • the laser acidification process of the present invention can be applied in acidification operations to stimulate wells in carbonate formations, as is the case with the pre-salt, both in cannons with acid injection for the production of the coated well, as in horizontal wells opened through cut design to obtain the best increase of the well IP, as well as in conventional fracturing operations to start the fracture propagation in the best direction.
  • acid fracturing operations the proposed process can achieve an increase in the control of the dimensions of the fracture wing geometry, increasing the thickness, width and length, since the laser light can be directed through the movement of lenses and mirrors to the region of the coated well or open well in function of the best fracture propagation direction.
  • Figure 1 represents a schematic of a well in which the formation was damaged in the drilling process.
  • Figure 2 represents a scheme of heating the acid through the laser, according to the present invention.
  • the present invention relates to an oil well stimulation process.
  • the process of the present invention takes place using the coupling of three tools: a laser system for well operations, combined with a cooling tool, both coupled to a laser acidification tool for well operations.
  • the laser system for well operations was designed to descend into the well through a flex tube that, in principle, will be responsible for carrying the tool load, as well as the surface fluid that will be responsible for cooling.
  • the acid can be pumped through the same flexitube and be directed to the creation of cannonite tunnels and or cuts in the formation.
  • the alignment of the acid flow and the focus of the laser radiation will be carried out on the external surface of the tool, through a specific component.
  • the acid and laser injection nozzle of the laser acidification tool designed for this purpose will allow, through a central hole, the laser radiation to be focused on the formation wall to form the tunnel or the cuts.
  • Around this hole, in a circular shape, will be the holes through which the acid will come out, which will be aligned converging with the laser focus, so that it can allow the simultaneous action of the laser and the acid on the production formation.
  • the process according to the present invention uses a laser acidification tool 1, which applies a flow of acid 2 in the cannonado tunnel 3.
  • the tool allows the process to occur with incidence laser radiation 4 on the formation, which may or may not be simultaneous with acid injection.
  • the acids to be injected are selected from the group consisting of hydrochloric acid, sulfuric acid, hydrofluoric acid, acetic acid, or mixtures thereof.
  • the acid is selected from hydrochloric acid.
  • the acid can be in concentrations ranging from 2% v / v to 99% v / v.
  • the acid can be in concentrations between 3% v / v and 95% v / v, more preferably between 5% v / v and 90% v / v.
  • laser radiation is understood to mean radiation with a power between 5 and 4000 mW / cm 2 .
  • the laser radiation of the present invention is between 100 and 3000 mW / cm 2 .
  • the process according to the present invention aims to improve the efficiency of the penetration of the acid treatment into the carbonate rocks and, therefore, the result of the well IP by increasing the area open to the flow between the reservoir and the well.
  • the increase in the area open to the flow will be a function of the increase in the length and diameter of the cannonized tunnels, as well as the possibility of making a greater number of cannonados than with conventional cannon technology with explosive charges.
  • the increase in temperature alters the kinetics of the reaction leading to a faster consumption of carbonate rocks, thus reducing treatment time as well as increasing treatment efficiency.
  • the innovation can generate, reduction of the treatment time and respectively the probe time, thus improving the NPV of the field, increasing the productivity of the wells improving the production curve of the field.

Landscapes

  • 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)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

La présente invention concerne un procédé de stimulation de puits de pétrole en vue d'augmenter la production de pétrole et/ou de gaz. Le procédé proposé se caractérise par l'utilisation conjointe d'un acide et d'une émission laser, de manière séquentielle et/ou simultanée, augmentant la productivité de puits perforés pour des opérations en puits de pétrole.
PCT/BR2019/050490 2018-11-19 2019-11-13 Procédé de stimulation de puits de pétrole Ceased WO2020102870A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRBR1020180737686 2018-11-19
BR102018073768-6A BR102018073768B1 (pt) 2018-11-19 Processo para estimulação de poços de petróleo

Publications (1)

Publication Number Publication Date
WO2020102870A1 true WO2020102870A1 (fr) 2020-05-28

Family

ID=70773456

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2019/050490 Ceased WO2020102870A1 (fr) 2018-11-19 2019-11-13 Procédé de stimulation de puits de pétrole

Country Status (1)

Country Link
WO (1) WO2020102870A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021245452A1 (fr) * 2020-06-03 2021-12-09 Saudi Arabian Oil Company Outil de stimulation hybride et procédés associés

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3478825A (en) * 1967-08-21 1969-11-18 Shell Oil Co Method of increasing the volume of a permeable zone within an oil shale formation
US3842911A (en) * 1971-04-26 1974-10-22 Halliburton Co Method of fracture acidizing a well formation
US3918524A (en) * 1974-08-21 1975-11-11 Halliburton Co Fracture acidizing method
US7503404B2 (en) * 2004-04-14 2009-03-17 Halliburton Energy Services, Inc, Methods of well stimulation during drilling operations
WO2011008544A2 (fr) * 2009-06-29 2011-01-20 Halliburton Energy Services, Inc. Opérations au laser en puits de forage
WO2012064356A1 (fr) * 2010-11-11 2012-05-18 Gas Technology Institute Procédé et dispositif pour la perforation de puits de forage
WO2014078663A2 (fr) * 2012-11-15 2014-05-22 Foro Energy, Inc. Systèmes d'outils et procédés de fracturation et de stimulation hydrauliques à laser de forte puissance
WO2017100354A1 (fr) * 2015-12-07 2017-06-15 Morse Robert L Production accrue d'hydrocarbures par stimulation thermique et radiale

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3478825A (en) * 1967-08-21 1969-11-18 Shell Oil Co Method of increasing the volume of a permeable zone within an oil shale formation
US3842911A (en) * 1971-04-26 1974-10-22 Halliburton Co Method of fracture acidizing a well formation
US3918524A (en) * 1974-08-21 1975-11-11 Halliburton Co Fracture acidizing method
US7503404B2 (en) * 2004-04-14 2009-03-17 Halliburton Energy Services, Inc, Methods of well stimulation during drilling operations
WO2011008544A2 (fr) * 2009-06-29 2011-01-20 Halliburton Energy Services, Inc. Opérations au laser en puits de forage
WO2012064356A1 (fr) * 2010-11-11 2012-05-18 Gas Technology Institute Procédé et dispositif pour la perforation de puits de forage
WO2014078663A2 (fr) * 2012-11-15 2014-05-22 Foro Energy, Inc. Systèmes d'outils et procédés de fracturation et de stimulation hydrauliques à laser de forte puissance
WO2017100354A1 (fr) * 2015-12-07 2017-06-15 Morse Robert L Production accrue d'hydrocarbures par stimulation thermique et radiale

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021245452A1 (fr) * 2020-06-03 2021-12-09 Saudi Arabian Oil Company Outil de stimulation hybride et procédés associés
US11661825B2 (en) 2020-06-03 2023-05-30 Saudi Arabian Oil Company Hybrid stimulation tool and related methods

Also Published As

Publication number Publication date
BR102018073768A2 (pt) 2020-06-02

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