WO2022081790A1 - Paroi de séparation de coulis et procédé de construction - Google Patents

Paroi de séparation de coulis et procédé de construction Download PDF

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Publication number
WO2022081790A1
WO2022081790A1 PCT/US2021/054896 US2021054896W WO2022081790A1 WO 2022081790 A1 WO2022081790 A1 WO 2022081790A1 US 2021054896 W US2021054896 W US 2021054896W WO 2022081790 A1 WO2022081790 A1 WO 2022081790A1
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WO
WIPO (PCT)
Prior art keywords
grout
partition
treatment
sleeve
aquifer
Prior art date
Application number
PCT/US2021/054896
Other languages
English (en)
Inventor
Andrew A. MCCREA
Original Assignee
Aera Energy Llc
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
Application filed by Aera Energy Llc filed Critical Aera Energy Llc
Priority to PCT/US2022/025233 priority Critical patent/WO2023063995A1/fr
Publication of WO2022081790A1 publication Critical patent/WO2022081790A1/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
    • E21B43/32—Preventing gas- or water-coning phenomena, i.e. the formation of a conical column of gas or water around wells
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
    • E21B33/14—Methods or devices for cementing, for plugging holes, crevices or the like for cementing casings into boreholes
    • E21B33/146—Stage cementing, i.e. discharging cement from casing at different levels
    • 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

Definitions

  • the present invention relates to the field of drilling operations and more specifically to a method of construction of subsurface grout partitions.
  • Grouting is widely used in groundwater and construction industries as a method for managing groundwater flow.
  • hydro fracture grouting which deliberately fractures the ground (soil or rock) using grout under pressure. Typically, it is used to compact and stiffen the ground or to access otherwise inaccessible voids, thus reducing the mass permeability of the ground and producing controlled uplift of structures. Hydro fracture grouting is commonly used to relevel structures and stabilize and mitigate settlement of overlying structures during tunneling.
  • Another type of grouting is rock grouting wherein a shallow vertical hole is made and a grout slurry injected into the void space within coarse granular soils. This technique has been used to reduce ground water flows during activities such as basement excavation.
  • Hydraulic fracturing is a well stimulation treatment in oilfield operations. More recently, horizontal drilling and completion operations have been developed to produce oil from shale formations. A wellbore is drilled to depth into an oil-bearing stratum and thereafter drilling orientation is changed to a horizontal lateral wellbore within the stratum. This allows for a single well to have a greater portion of the wellbore in contact with the oil-bearing stratum and thus more hydrocarbon production per well than is possible with vertical production wells.
  • Hydraulic fracturing involves forcing a liquid under high pressure from a wellbore against a rock formation until it fractures. The injected fluid contains a proppant, i.e.
  • the proppant maintains the fracture, increasing effective sandface engagement area of the well and allows hydrocarbons such as crude oil and natural gas to flow more easily to the wellbore.
  • the South Belridge Oilfield in Kern County, California is one such oilfield where steam injection is used to recover oil from the Tulare zone.
  • the oilfield has an anticlinal structure containing the oil trapped by a saline aquifer pushing in and up structure from the sides. Multiple steam injection wells are spaced within this reservoir.
  • the base of the reservoir is in contact with the Lower Tulare aquifer.
  • Production from this reservoir is primarily brine water as the water-oil ratio of produced liquids is over 50: 1. Most of the brine water produced with Tulare oil is from the Lower Tulare aquifer as aquifer water flows into the produced formation.
  • Prior art Fig. 1 is a representation of the oil production at the early stages of a steam flood.
  • Steam ST is injected into reservoir R using multiple injection wells 14 that traverse from the earth’s surface 12, through various stratum represented by 13 and thru a non-permeable shale layer S.
  • reservoir R exhibits hydraulic balance between the aquifer A and the oil bearing zone O for a geographic strata having an anticline.
  • the oil is then pumped from the oil bearing zone by production wells 18.
  • steam-oil level SOL 20 is higher than the depth at which the oil is being produced represented by 22 and 24 and the oil-water level 26 of aquifer A is lower.
  • panel refers to the concretion of a grout slurry within a fissure.
  • a panel is created by using a pathway such as a treatment sleeve or perforations as described below, which create one or more fissures by hydro fracture and pumping a pre-determined volume of a grout slurry through the pathway and into the fissure.
  • hydro fracture refers to the technique of using a liquid or slurry pumped down a casing string at a sufficient pressure to create a fissure in the stratum adjacent to a pathway.
  • partition refers collectively to the plurality of panels created along the lateral portion of a well or wells.
  • lateral portion refers to the near horizontal inclination of casing that has been set in a hole created by horizontal drilling.
  • the term “grout” refers to a low permeable composition. Cement is a type of grout encompassed by the term “grout”.
  • treatment fluid refers to any mix of water with polymers or chemical additives that are commonly used to initiate or propagate a hydraulic fracture preceding the pumping of the fracture-filling grout slurry.
  • treatment sleeve refers to a mechanically or hydraulically actuated port that is part of the lateral portion of the casing string.
  • the method described herein is a hydro fracture grouting technique wherein a series of grout-filled panels, are formed in fissures created by hydro fracture pressure.
  • the plurality of panels collectively define a subsurface partition that inhibits movement of water from an aquifer into an oil bearing portion of a reservoir.
  • Panels are thus formed by the use of horizontal drilling technology to first drill a well and set a casing string in the wellbore.
  • the casing string has a lateral portion positioned in the desired stratum.
  • the lateral portion of the casing string further comprises a plurality of pathways from the casing to the adjacent stratum, which are used to propagate fissures and pump a sufficient volume of grout slurry into respective fissures created.
  • a sufficient volume is a volume that would be necessary to create a pressure drop to inhibit influx of aquifer water into the oil producing zone of the reservoir.
  • a preferred volume range of grout slurry to be pumped into a fissure is between about 1,600-63,600 liters (10-400 barrels).
  • treatment sleeves positioned along the lateral portion of the casing string are used as the pathways for creating the panels.
  • Multi-stage treatment technology comprises a combination of treatment fluids to initiate and propagate a fissure or fracture in the stratum, followed by the pumping of a grout slurry to fill the induced fissure or fracture as the method for placement of the panels.
  • the panels formed adjacent to the treatment sleeves collectively define a partition which functions as an obstruction to water movement.
  • the grout partition comprises a plurality of panels where each panel is a concretion of grout within a fissure adjacent to a respective treatment sleeve located on the lateral portion of a downhole casing string.
  • the grout used is less permeable than the surrounding stratum.
  • a grout partition can impede water flow from an aquifer toward oil producing wells.
  • the water-oil ratio of liquid produced is reduced and as a consequence, costs related to oilwater separation and water disposal are also reduced. Additionally, by reducing aquifer influx, more oil reserves near the oil water contact become available for development that are economically unreachable by current processes.
  • the lateral portion of the well is positioned preferably at a depth that is below the oilwater contact level.
  • a plurality of treatment sleeves are spaced apart in series at pre-determined intervals along the lateral.
  • a panel is created by opening one sleeve and pumping a sufficient volume of a treatment fluid and grout slurry through the opened sleeve. After the grout slurry is pumped through the opened sleeve, the treatment sleeve is closed. This process is repeated until a grout slurry has been pumped through each of the treatment sleeves to be used to form respective grout panels.
  • Each panel of the grout partition introduces a localized flow impediment that disrupts normal aquifer flow into the oil reservoir. Aquifer water must travel a more tortuous path between the impermeable partition panels, thus inducing a flow restriction.
  • a less preferred “pathway” alternative is the use of perforated holes in the casing rather than treatment sleeves for creating panels. Once the casing string has been run and cemented in place, the casing would be perforated at desired locations along the lateral portion, and thereafter, the treatment fluids and grout slurry would be pumped through the perforations for creating one or multiple panels.
  • subsurface grout partitions can be constructed to function as an underground containment for fluids such as carbon dioxide.
  • a fluid sequestration chamber would isolate available subsurface pore space within the chamber from the surface and surrounding strata.
  • the pathway spacing along the portion of the casing string may be denser than the spacing for the aquifer partition described earlier.
  • a sequestration chamber is a volume of porus stratum such as a water bearing stratum adjacently below a non-permeable stratum and bounded around the volume by two or more lateral portions.
  • a sequestration chamber would comprise a plurality of subsurface partitions formed around available pore space to augment the natural containment features of a particular geographic strata; or to form a completely artificially bounded fluid sequestration chamber.
  • a carbon dioxide sequestration chamber could be created near the source of the generated CO2, and used to quickly and efficiently dispose of the CO2 by well injection.
  • the CO2 can be sequestered at or near emission sources by injection into a sequestration chamber within subsurface strata suitable for receipt of the CO2.
  • This method of sequestration could reduce costs associated with transportation and storage in addition to possibly providing offsets or reductions to any carbon tax scheme implemented in the future.
  • Subsurface partition technology can also extend the reach of existing hydrologic technology to control fluid flow or prevent the migration of contaminant plumes in the subsurface.
  • FIG. 1 is a prior art representation of an hydrocarbon anticline structure with fluids produced from a reservoir.
  • FIG. 2 is a prior art representation of fluids produced from a reservoir having a steam flood and active brine water aquifer.
  • FIG. 3 illustrates a partition in place within an aquifer.
  • FIG. 4 illustrates a drilled well having a lateral portion with a string of casing set.
  • FIG. 5 is a view of a well and casing having an initial panel.
  • FIG. 6 is a view of a well and casing having a plurality of panels.
  • FIG. 7 is a graph illustrating production increase following partition installation.
  • FIG. 8 is a graph illustrating the oil-steam ration increase following partition installation.
  • FIG. 9 is a graph illustrating the water-oil ratio reduction following partition installation.
  • FIG. 10 is a representation of an alternative partition wherein multiple wells are drilled, each with a different lateral depth and each having a plurality of panels.
  • FIG. 11 is a representation of a partition in respective stratum wherein multiple wells are drilled, each with a different lateral depth and each having a plurality of panels.
  • FIG. 12 is a representation of downhole fluid removal from a sequestration chamber.
  • FIG. 13 is a representation of fluid injection into a sequestration chamber.
  • a grout partition 10 was created along a portion of the Tulare reservior in the Bellridge Oil field, Bakersfield, California in April, 2021.
  • FIG. 3 illustrates the position of the grout partition 10 within aquifer A where horizontal drilling and multi-stage treatment technology is used as a method for placement of panels 60.
  • the plurality of panels 60 collectively define a partition 10 which functions as an obstruction to water movement.
  • Well 70 API57L-35
  • 9.625 inch casing 40 was run and the wellbore was filled with cement 42 between the outside of casing 40 and the surrounding stratum as is standard practice.
  • an 8.75” hole was drilled for the lateral portion of the well which was positioned below the oil-water interface 26.
  • the overall length of the hole was 1061 meters (3484 ft).
  • a casing string 50 was run into the hole comprising 5.5 inch, 171b casing with twenty-eight treatment sleeves 54, all being in a closed position.
  • the treatment sleeves used were NCS Model # E0032328 - 5.5" InnovusTM HD MultiCycle CS FRAC SLEEVE (SA) 17 Ib/ft L80 BTC 7.00" OD manufactured by NCS Multistage, LLC, Houston, Texas (US).
  • SA InnovusTM HD MultiCycle CS FRAC SLEEVE
  • the wellbore was filled with cement 52 between the outside of casing 50 and the surrounding stratum as is standard practice.
  • the hydro fracture grouting treatment comprised pumping fluids in the following quantity and order:
  • FIG. 5 is a representation of the deepest panel 60 created.
  • FIG. 6 illustrates all panels 60 created, collectively forming grout partition 10.
  • the average height of each panel was estimated to be 33.8 meters (111 ft); with approximately 2/3 of the panel height above the lateral portion and 1/3 below.
  • the average half-length of each panel is 46 meters (151 ft).
  • FIGs 7-9 are charts illustrating oil production improvement.
  • FIG. 7 is a chart of daily oil production vs. steam injection. Oil production, since installation of grout partition 10 in early April 2021, has increased while requiring less steam injection than in prior months. This is indicative of the partition 10 obstructing aquifer flow and reducing the quantity of steam required to overcome encroachment by aquifer A.
  • FIG. 8 is a chart of the produced oil-steam ratio over time. Subsequent to the installation of partition 10 in April 2021, this ratio is at its highest level since before January 2017.
  • FIG. 9 is a chart of the produced water-oil ratio over time. Since installation of partition 10 in April 2021, this ratio has been reduced; meaning less water is being produced per barrel of oil and associated disposal costs have reduced.
  • the method for creating grout partition 10 comprised the following steps. Coiled tubing was run to depth and used to open the deepest treatment sleeve 54, then withdrawn from the casing for a hydro fracture grouting treatment, and then run back into the casing to close the opened sleeve and then raised to the next shallower sleeve to open. This procedure was repeated for all 28 sleeves.
  • the material that was pumped downhole comprised the following:
  • the above described methodology can be used for placement of partitions in multiple stratum in the same oilfield.
  • several wells each having a plurality of lateral treatment sleeves as described above, can be set in a particular fluid conducting stratum X, either in series (not shown) or staggard above one another as illustrated by wells 70, 70’ and 70” in FIG. 10.
  • Grout partitions could also be used in different fluid conducting stratum X stratum, as illustrated by wells 80, 80’ and 80”in FIG. 11.
  • FIGs 12-13 also illustrate a sequestration chanber.
  • a sequestration chamber could be constructed on a pre-determined parcel of land; by way of example, a 258 hectare (640 acre) parcel of land under which lies a zone or zones of connected pore space within stratum X that has an impermeable stratum S above the pore space and which is below 792 meters (2,600 ft) true vertical depth.
  • This depth is known to be the minimum depth for CO2 sequestration under most regulatory jurisdictions because it is the minimum depth at which the CO2 will remain in supercritical state under normal pressure conditions.
  • a plurality of grout partitions 10 would be created to form the side boundaries of a geometric structure similar in configuration to a square or rectangular prism (4 side) or triangular prism (3 side).
  • each grout partition would define the border or edge of one side of the sequestration chamber and the panels of each would be created using wells 70, 70’, 70” and 70’”. Multiple wells each having a lateral portion at a different depth can also be used as described earlier for one or more of the grout partitions.
  • a grout partition comprising: a plurality of panels, each panel a concretion of grout within a fissure adjacent to a pathway located on the lateral portion of a downhole casing string.
  • a grout partition comprising: a plurality of subsurface panels wherein each panel is created within a fissure by a hydro fracture grouting treatment, the composition of each panel initially flowing through a respective treatment sleeve located on the lateral portion of a downhole casing string.
  • a method for constructing a grout partition in a brine or saline or fresh water aquifer comprising the following steps: a) drilling a subsurface hole having a lateral portion which is, or at least substantially, within a brine or saline or fresh water aquifer; b) running a casing string that extends into the lateral portion of the subsurface hole, the lateral portion of the casing string comprising a plurality of treatment sleeves spaced apart from one another in series; c) cementing the annular region between the subsurface stratum and the lateral portion of the casing string; d) opening a treatment sleeve and pumping a grout slurry through the opened treatment sleeve at a sufficient pressure to create a fissure for the treatment fluids and grout slurry to flow into and form a panel; and, e) repeating step d) for each treatment sleeve to be used to form a panel.
  • a method for constructing a grout partition in a brine or saline or fresh water aquifer comprising the following steps: a) drilling a subsurface hole having a lateral portion which is at least substantially within a brine or saline or fresh water aquifer; b) running a casing string that extends into the lateral portion of the subsurface hole; c) cementing the annular region between the subsurface stratum and the lateral portion of the casing string; d) perforating a plurality of holes through the casing at a pre-determined depth in the lateral portion; e) pumping a grout slurry through the perforated holes at a sufficient pressure to create a fissure for the treatment fluids and grout slurry to flow into and form a panel; and, f) repeating
  • a method for impeding water flow from an aquifier toward an oil producing well comprising constructing a grout partition in a brine or saline or fresh water aquifer.

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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)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

Une paroi de séparation empêche l'écoulement d'eau d'un aquifère dans un réservoir de production de pétrole. La paroi de séparation comprend une pluralité de panneaux de coulis souterrain, chaque panneau étant positionné à l'intérieur d'une fissure créée par un traitement de cimentation par fracturation hydraulique. Un puits est foré dans la région cible à l'aide d'une technologie de forage de puits horizontal et d'un tubage cimenté en place. Le tubage comprend une pluralité de manchons de traitement espacés en série. Chaque panneau est formé par une suspension de coulis pompée à travers un manchon de traitement respectif situé sur la partie latérale de la colonne de tubage
PCT/US2021/054896 2020-10-16 2021-10-14 Paroi de séparation de coulis et procédé de construction WO2022081790A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2022/025233 WO2023063995A1 (fr) 2021-10-14 2022-04-18 Chambre de séquestration et procédé de construction

Applications Claiming Priority (2)

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US202063092569P 2020-10-16 2020-10-16
US63/092,569 2020-10-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115419384A (zh) * 2022-07-04 2022-12-02 中国矿业大学(北京) 一种采动覆岩完全破断型的含水层动态注浆截流堵水方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108222882A (zh) * 2018-01-25 2018-06-29 安徽省煤田地质局第勘探队 巨厚冲积层单井多层段注浆新型套管与施工方法
US20190128068A1 (en) * 2016-04-01 2019-05-02 Board Of Regents Of The Nevada System Of Higher Education, On Behalf Of The University Of Nevada Systems and methods for enhancing energy extraction from geothermal wells
CN110566118A (zh) * 2019-09-09 2019-12-13 中煤科工集团西安研究院有限公司 煤矿井下深埋含水层底板组合定向孔超前注浆改造方法
CN110761814A (zh) * 2019-10-30 2020-02-07 中煤科工集团西安研究院有限公司 基于预裂与注浆改性的顶板水控制方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190128068A1 (en) * 2016-04-01 2019-05-02 Board Of Regents Of The Nevada System Of Higher Education, On Behalf Of The University Of Nevada Systems and methods for enhancing energy extraction from geothermal wells
CN108222882A (zh) * 2018-01-25 2018-06-29 安徽省煤田地质局第勘探队 巨厚冲积层单井多层段注浆新型套管与施工方法
CN110566118A (zh) * 2019-09-09 2019-12-13 中煤科工集团西安研究院有限公司 煤矿井下深埋含水层底板组合定向孔超前注浆改造方法
CN110761814A (zh) * 2019-10-30 2020-02-07 中煤科工集团西安研究院有限公司 基于预裂与注浆改性的顶板水控制方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115419384A (zh) * 2022-07-04 2022-12-02 中国矿业大学(北京) 一种采动覆岩完全破断型的含水层动态注浆截流堵水方法

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