The open hole gravel pack packers have differential pressure ratings to address both gravel pack and production modes. Proper gravel pack can keep a well from pumping sand. Review of the current horizontal open hole gravel pack. The openhole gravel pack packers have differential pressure ratings to address both gravel pack and production modes. Horizontal open hole gravel pack placement requirements in. The gravel pack acts as a well screen in this example. Spe members abstract in sandproducing formations, a cased hole gravel pack is usually the preferred completion method. Please input your information and the appropriate person will contact you. For its part, the grids and slotted liners represent a suspended filter that puts a strain on. Gravel pack is one of sand control methods and it uses sized sands as a filter media to.
Open hole gravel pack ohgp has the highest productivity of gravel pack completions due to the greater area of formation fluids to flow into the wellbore. These screens can be used with conventional gravel pack systems as well as singletrip perforating and gravel and frac pack systems. Openhole gravel pack schlumberger oilfield glossary. Openhole gravel packing of fishhook wells with zonal. The spe distinguished lecturer program is funded principally through a grant from the spe foundation.
Tubing pressure is used to set the packer and the setting force is locked into the packer by a body lock ring. Run a 20 or 30 slot screen and pack with 2040 gravel. Pdf well completion design jonathan bellarby last hand. In addition to running a casing with a liner, gravel packing is used to prevent sand from entering. Icd gravel pack well design typical architecture for horizontal open hole gravel pack wells with standard screens bull plug typical architecture for horizontal open hole gravel pack wells with icd screens gp packer 512 standard screens 2. The compactor will pack the rocks in the gravel together and create a strong subgrade or tightly compacted road. Formations where cased hole gravel packing has unacceptable productivity. A weak formation is likely to fracture, causing a loss. Gravel placement technique is much simple in vertical wells and much more difficult. Historically, sandprone openhole reservoirs could be completed only in. The classical problem in gravel packing occurs when premature sand bridges form in the annulus between the sand retainer screen and the casing wall, for an in. Because openhole gravel packs have no perforation tunnels, formation fluids can converge toward and through the gravel pack radically from.
It is widely accepted that a properly designed and installed, graded gravel pack will enhance a wells efficiency and will control the migration of fine formation sand into the well. Jul, 2010 in shallow, deviated or long horizontal wells, weatherfords expandable sand screens can be an alternative to openhole gravel pack. Open hole completion in an open hole gravelpack completion, if one assumes that the screen has negligible resistance to flow, the skins are then due to the invaded zone, the gravel, and the. Sand control in water wells gravel pack for water wells duration. The bridges usually form either at the top of the screen or adjacent to zones of higher permeability. It showcases the procedure once both reservoir sections have been drilled and open hole gravel pack operations have been completed. Formations with weak rock often require sand screens and gravel packs to be inserted into the reservoir to stabilize the hole and maintain the flow of oil from the reservoir into the well bore. New trends and challenges in open hole gravel pack. The compactor is loud and will cause a lot of dust. Expandable sand screens, or ess, is the primary expandable completion technique in weatherford international s suite of slotted expandable tubulars that was developed from a concept originally identified in 1993. Spe 1228 an inflow prediction model for open hole gravel. The model also addresses the amount of solids from the mud that are left.
The spe foundation through member donationsthe spe. Open hole completion in an open hole gravel pack completion, if one assumes that the screen has negligible resistance to flow, the skins are then due to the invaded zone, the gravel, and the. In shallow, deviated or long horizontal wells, weatherfords expandable sand screens can be an alternative to openhole gravel pack. Greater plutonio open hole gravel pack completions. Gravel packing creates a permeable downhole filter that will allow the production of the formation fluids but restrict the entry and production of formation sand. Openhole applications testing multizone completions, expandable. However, the productivity of the cased hole gravel pack is much poorer than the alternatives because of high. The society gratefully acknowledges the companies that support this program by allowing their professionals to participate as.
Formations where casedhole gravel packing has unacceptable productivity. Challenging completions on land, in the shelf, in deep and ultradeepwater demand highquality technology that reduces risk, increases completion efficiencies and maximizes production. I have seen a lot of discussion about gravel packs, and most guys say the same thing. This packer features a double backup element system that is capable of holding high pressures in open hole or large id cased holes. To learn more about our gravel pack systems, please visit our website. The overall pressure drop through the gravel pack completion is divided into three parts. From unconsolidated to tight sand formations, in openhole or casedhole wells, and for both conventional and unconventional applications, we deliver an unsurpassed level of gravelpacking and fracpacking performance and efficiency. An narrated animation video about how gravel pack completion is done. Another option is to run a gravel pack liner or screen and gravel pack the open interval. An efficient gravel pack completion retains formation sand without creating significant additional pressure drop through the completion itself. The spe foundation through member donationsthe spe foundation. Situations where workovers for isolating gas or water cannot be accomplished. Hydromissions does a good job explaining how to make your casing in the field and add the gravel pack.
Horizontal open hole gravel pack hohgp is the conventional sand control technique for offshore non consolidated reservoirs in brazil. One size packs all the 4ft diameter circle mimics a gravelpacked production well with an outside gravel pack diameter of 4 ft a common gravel pack outside diameter used in new england. Contact to find out more about our open hole gravel packing solutions. The completion assembly encompasses screens and joints that hold the gravel pack in place. Lecture 11gravel pack pletion overview of pletions lecture 11gravel pack pletion sand control v s solids equipments. Antiswab service toolmultiple benefits in a single trip. The worlds first successful shunt tube uphill gravel pack in a fishhook well was executed in september 2010. The model is used for simulating the gravel pack process and determining the effectiveness and pack efficiency of the gravel pack job. Openhole applications testing multizone completions. Openhole gravel pack ohgp has the highest productivity of gravel pack completions due to the greater area of formation fluids to flow into the wellbore. Sep 08, 2016 gravel pack design requires considerations on gravel and screen sizing, fluid selection, and placement technique. The schlumberger antiswab service tool permits constant hydrostatic pressure in the open hole, eliminating the swabbing effects of hardware movement and ensuring filtercake integrity before gravel placement. Cased hole gravel pack chgp open hole gravel pack ohgp st d al s sasstand alone screen sas formation consolidation ftifracturing screenless frac pack hi h r t w t p k hrwphigh rate water pack hrwp frac pack ffll dbfrac followed by edblsexpandable screen 4.
The final output was used to provide rig personnel with a detailed deck management plan required for assembly and deck testing of the subsea xmas trees prior to deployment which had been optimised to minimise lifting. The larger sand referred to as gravel pack sand or simply, gravel is sized to be about 5 to 6 times larger than the formation sand. The same type of completion was performed for a second time a few months later. The standard openhole gravel pack packers have 6,0007,500 psi differential pressure ratings in the production mode and 10,000 psi rating in the gravel pack service positions. Chapter 12 cased hole gravel packing practices perforation prepacking, prepacking below fracture pressure, prepacking above fracture pressure, pumping equipment requirements, completion type selection chapter open hole gravel packing guidelines for selecting open hole gravel pack candidates. Introduction of gravel pack with inflow control completion in. Openhole gravel packing society of petroleum engineers. Spe 158655 design, qualification, and installation of. There are various reasons why the alternatives, an open hole gravel pack or a sand consolidation treatment, may not be suitable. The nexus of theory, experience and personal preference. When the treatment is to be applied on an existing well, a section of casing. Gravel pack design requires considerations on gravel and screen sizing, fluid selection, and placement technique. When the treatment is to be applied on an existing well, a section of casing may be milled out.
Openhole gravel pack ohgp has the highest productivity of gravel pack completions due to the greater area of formation fluids to flow into. Prior to running casing, the well planner must consider how the drilled rock will react to drilling fluids, pressures and mechanical actions over time. Superior energy completion services delivers effective sand control, stimulation and productionrelated solutions for any downhole condition. Aquapac openhole gravelpack service ohgp schlumberger. Basic sand control methods in oil and gas industry drilling. For cased hole completions, an added objective is to pack the perforations with gravel because the latter significantly improves well productivity and longevity. Completion oil and gas wells help to improve this pagewhats this. Stabilization of an unconsolidated sandface is vital to gravelpack success. Wirewrapped and premium sintered mesh versions are available. From unconsolidated to tight sand formations, in openhole or cased hole wells, and for both conventional and unconventional applications, we deliver an unsurpassed level of gravel packing and fracpacking performance and efficiency.
Horizontal gravel packs have become a popular method of completing horizontal wells to stabilize long openhole completions, especially in formations with. In sandproducing formations, a cased hole gravel pack is usually the preferred completion method. If an excessive amount of dust begins to form dampen the gravel more. Gravel pack placement requirements include the design of pumping pressures inside the operational window formed by the minimum pump rate to avoid premature rat hole screenout and maximum pump rate to avoid. Effective gravel packing considers longterm production. Baker hughes has announced the commercial release of its patentpending torrent openhole gravelpack solution, designed to help.
To predict gravel packed well performance, a completion model that calculates pressure drop for a gravel pack completion is necessary. This model, being a true 3d model can be used to simulate special situations in which significant leakage into the formation occurs during gravel packing. Differential pressure between reservoir and wellbore. Predicting the pressure drop in a casedhole gravel pack. Evaluation of design criteria for gravel pack and hydraulic. A new skin factor model for gravelpacked completions. Lecture 11gravel pack pletion overview of pletions lecture 11gravel pack pletion sand control v s solids equipments lecture 11gravel pack pletion. Open hole barefoot well completion conventional single zone completion open hole completion open hole completions can be barefoot, where tubing is run and a packer is set in the casing above the open hole the well put on production.
By posting, you agree to be identified by your ip address. Many times underreaming the well is carried out to provide a larger diameter hole and to. Gravel packing can be done for both openhole and casedhole completions. Once the hole is drilled, how to case a well and add. Introduction of gravel pack with inflow control completion. Chapter 12 casedhole gravel packing practices perforation prepacking, prepacking below fracture pressure, prepacking above fracture pressure, pumping equipment requirements, completion type selection chapter open hole gravel packing guidelines for selecting open hole gravel pack candidates. Schlumbergers alternate path gravel pack systems use fluids and. The initial open hole gravel pack ohgp wells in an offset angola deepwater block, were drilled with oil based mud and the hol e was displace d to brine prior t o running s creens. Review of the current open hole gravel pack 11 alpha and beta wave technology water pack cross section well with open hole gravel pack oil flow through created filter h proppant screen open hole reservoir screen wash pipe selected gravel wave. Proper gravel pack can keep a well from pumping sand 2015. Effective gravel packing considers longterm production oil. Well talk about the easiest and simplest one first.
Carboair enables the effective completion of a long open hole gravel pack ohgp in the north sea. Open hole gravel pack animation a pictures of hole 2018. An animation of the weatherford expandable sand screens is available below. All wells, at least when first drilled, have openhole sections that the well planner must contend with. The gravel pack provides support for the face of the hole, because it applies a finite effort against the formation, specifically in the gravel interface and training, which retains the same and reduce the fine to step into the package with gravel. Oct 01, 2015 thats a pretty fine slot, and not a lot of open area so, while it might work for a house well, it isnt enough for an irrigation well. Our gravelpack systems give you a strong defense against damaging sand and fines in a variety of downhole settings. Gravel pack some wells require filtration systems in order to keep the wellstream clear of sand. Reservoirs where long, sustained singlephase hydrocarbon flow is anticipated. The gravel pack will hold the bottom of the hole open so more water can enter. Our gravel pack systems give you a strong defense against damaging sand and fines in a variety of downhole settings.
In this paper, a theoretical turbulence skin factor model for casedhole gravelpacked wells is presented that can be used to determine the effects of the gravel pack on well performance. Completion technology for unconsolidated formations. The main objective of annular gravel placement is to effectively pack the annulus between the screen and the casing or the open hole. Singletrip openhole cementing and side tracking system. A type of sandcontrol completion in which the gravel pack screen is packed off in an openhole section with no casing or liner to support the producing formation. Gravel pack cased hole and open hole and frack pack.75 437 1377 887 168 1146 864 1372 369 1509 754 411 308 126 121 1335 1571 190 374 957 1106 885 692 1383 586 828 827 1536 513 1077 1103 182 1464 1331 388 1441 1236 303