Application of artificial intelligence techniques to predict. Task 1 perform a literature search of the state of the art in well control for vertical, directional, horizontal, extended reach, and multilateral. Advanced well concepts including horizontal and multilateral wells have become a dominant feature of new field development and redevelopment opportunities. Now, there are ten major oil companies supporting the project, including shell, total and bp. Drilling and completing multilateral horizontal wells in the middle east. If you have any questions, please call us at 250 9520192 in victoria, or tollfree at. This allows for alternative wellconstruction strategies for vertical, inclined, horizontal, and extendedreach wells. Final workshop report prepared for the minerals management service under the mmsotrc cooperative research agreement 14350199ca31003 task order 85221 mms project number 439. Us6012526a method for sealing the junctions in multilateral. Also, the performance of multilateral wells is compared with horizontal wells in reservoirs with 2phase gravity drainage, and multilateral wells are shown to be an effective solution to the waterflooding of a faulted reservoir. Read chapter 3 and 4 121 horizontal well application, drilling and completion assignment.
Failure of a multilateral well comsol multiphysics. This intense course focuses on the critical need for a proper understanding of all aspects of horizontal and multilateral design and completion. Work on a new multilateral well stimulation technology started three years ago as a joint industry project between fishbones a norwegian oil and gas technology company and statoil, eni, lundin, innovation norway, and the research council of norway. A comprehensive model of multilateral well deliverability. Junctions in multilateral well structures are sealed by employing a variety of degrees of premachined components and a variety of sealing embodiments, including casing segments having premachined windows, side pocket members which are adapted to reside within the string during run in and move laterally to the deployed position, woven members, cement filled ecps, etc. Vertical, fractured, horizontal, multilateral, multifractured, and radialfractured wells, second edition delivers updated examples and solutions for oil and gas well management projects. Multilateral introduction sadvantages of multilateral wells s reduction in tangibleintangible costs s reduced surface and intermediate drillingcasing s less cementing s fewer wellheads and gathering lines s smaller pads s less manhours on location s operational efficiencies. Multilateral and extended reach wells training youtube. The closed form model applies for relatively low vertical permeability formations for the singlephase system and two. Multilateral wells offer the potential for substantial improvement in well economics 15.
Innovative stimulation approach in a mature field with. Drilling a multilateral well underbalanced with the main bore producing can be done, but the drawdown on the reservoir is small. A multilateral well is a well drilled from a common vertical wellbore with. This petroskills training course is designed as a companion course to horizontal and multilateral wells.
Key issues in multilateral technology schlumberger. Lateral drilling over horizontal drilling for marcellus shale field. Multilateral solutions have been deployed in a handful of unconventional resource plays, including the bakken shale, the mississippian lime, the. The models can be divided into two main categories. Fishbone multilateral wells are applied to enhance well productivity by increasing the contact area between the bottomhole and reservoir region.
Multilateral wells cross normal lines between drilling and production and this presentation will illustrate the strong need for detailed preplanning and an interdisciplinary approach in applying this technology. Completion design optimization of multilateral well to. Report multilateral wells in production of thin oil reservoirs dissertation please fill this form, we will try to respond as soon as possible. Innovative stimulation approach in a mature field with special reference to multilayered, horizontal and multilateral wells such environment is highly challenging, because, most of the treatments get diverted to least resistant areas 1, 10, chances of high water production and difficulties in post treatment flow back. Yettheunitedstatesandcanada,combined, account for only % of the worlds petroleum production. Assessment and evaluation of degree of multilateral wells. Multilateral wells are the direct tesult of the advances of in directional drilling, mwd, and lwd. Pete 636 horizontal, multilateral and intelligent wells textbook required. Softsensing for multilateral wells with downhole pressure and temperature measurements conference paper pdf available november 2008 with 58 reads how we measure reads. Successful multilateral and horizontal wells require new considerations, interdisciplinary planning, and special techniques. Multilateral wells is intended to illuminate the most important aspects of multilateral wells in a concise way and give readers practical tools they can apply in the design and analysis of multilateral wells, while also pointing to the appropriate literature for more advanced studies. This can lead to early breakthrough of water or gas.
Higher pressure drawdown around the heel of the well can cause nonuniform fluid influx along the wellbore and higher production rates at the heel. Scribd is the worlds largest social reading and publishing site. A multilateral well can have lateral branches into different formation layers, multiple branches into the same layer, or a combination of both. Production data indicated a liquid flow rate of 5677 bopd, which corresponds to surface measured production rate with little free gas as the well was producing. Getting sufficient flow through the lateral to lift fluids can be a. While an additional 30 wells of this type were drilled, it was not until 1993 that the modern era of multilateral technology began.
Pdf softsensing for multilateral wells with downhole. An assessment of the state of the art in well control for extended reach and multilateral wells has been developed by completion of four interrelated tasks described as follows. The numerical simulation results show that the multilateral wells usually help improve the overall cumulative production from a reservoir. Starting with the estimation of fluid and reservoir properties, the content then discusses the modeling of inflow performance in. Multilaterals can be constructed in both new and existing oil and gas wells. Moreover, multilateral wells can be more economical from a drilling and well construction perspective, and help operators achieve improved economies of scale in production and treating facilities. The recent advancement of the multilateral and completions technology made multilateral wells a viable alternative to produce. Pdf multilateral wells evaluation utilizing artificial intelligence. The drilling and completion of multilateral wells is a major emerging technology within the oil industry1. In other words, two shapes of multilateral wells in this project are defined as scenarios for this reservoir. Gwdc multilateral drilling and completion technology. Paper spe 38 759 presented at spe annual technical conference and e xhibition, texas, 58 octobe r. Workshop on multilateral and extended reach wells a free powerpoint ppt presentation displayed as a flash slide show on id.
Horizontal, extended reach, and multilateral drilling. Fishbone wells are characterized by reduced operational time and a competitive cost in comparison to hydraulic fracturing operations. Economides course lecture schedule 1 19 introduction, course outline, method of study assignment. Directional drilling technology is being pushed further with increasingly complex well paths, distant targets, and more difficult drilling environments. Ppt workshop on multilateral and extended reach wells. Multilateral wellsthose with multiple legs that branch off from a single wellcan produce oil efficiently because the legs can tap multiple productive zones and navigate around impermeable ones. Two series of multilateral well drilling and completion tools and supporting techniques available for 9 58. Multilateral well drilling involves the drilling of two or more horizontal production holes from a single surface location see figure 2. However, the long horizontal wellbore can pose some serious production problems. Horizontal well technology unit, heriotwatt university and the. Assessment of well control procedures for extended reach and multilateral wells utilizing. Description download multilateral wells in production of thin oil reservoirs dissertation comments.
Petrobras drilled and completed three taml level 4 and 5 multilateral wells in. Unfortunately, drilling engineers must often mechanically stabilize multilateral wells with a liner or casing, which can cost millions of dollars. Pdf the use of multilateral well is becoming an emerging method to improve oil recovery efficiently and to drain reservoirs. However, limited models are reported to determine the productivity of fishbone wells. Drawbacks of ubd multilateral wells drilling a multilateral well underbalanced with the main bore producing can be done, but the drawdown on the reservoir is small. On the contrary, offshore drilling from either platformsordrillships,drillinginremotelocations,ordril. In multilateral well completions, two or more horizontal wellbores are drilled from a single parent wellbore, enabling drainage of multiple reservoir targets. Unfortunately, drilling engineers must often mechanically stabilize multilateral wells with a. It was a ninebranch well with barefoot laterals drilled by alexander grigoryan, a russian drilling engineer.
According to the statistics, among more than 8 000 multilateral wells in the world, only 351 wells adopt level 4 completion 8. In this project 2kinds of multilateral wells called dual opposed lateral and planar duallateral are studied from different points of views. Pdf multilateral wells in production of thin oil reservoirs. Multilateral completion systems allow the drilling and completion of multiple lateral boreholes within a single mainbore. A multilateral well is a well that has more than one branch radiating from the main.
The main driver for multilateral wells is their improved exposure of the productive formation per well. Pdf modeling of inflow well performance of multilateral wells. Multilateral well definition and meaning collins english. Unlocking production with multilateral wells hart energy. Fees includes course materials handouts, teacoffee, refreshments, international buffet lunch. Simple vertical profile of a horizontal well, illustrating basic terms. The recent advancement of the multilateral and completions technology made multilateral wells a viable alternative to produce multiple reservoir compartments, most especially offshore. Multilaterals hold promise for shales the american oil. Development and assessment of well control procedures for. As to the level 4 multilateral well completion, the recoverable whipstock sidetrack cutting with forced bit is mostly used to drill new borehole at home and abroad. May 14, 2015 crossreference to related applications.
In the past, multiple vertical wells were drilled to increase recovery. A further setback is that the cleaning up of the lateral is difficult if the main bore is a good producer. A well with two productive laterals is referred to as a dual lateral well. A single multilateral well can have significantly more payzone formation exposure than a single well. Jun 12, 2016 work on a new multilateral well stimulation technology started three years ago as a joint industry project between fishbones a norwegian oil and gas technology company and statoil, eni, lundin, innovation norway, and the research council of norway. The inflow performance models of horizontal, undulating, and multilateral wells are developed in this study. This application claims the benefit of priority of u. The well reportedly produced 17 times more oil than offset wells in the field at 1. The normal objective of both horizontal and multilateral wells is to produce more oil or gas from a well and to reduce the overall cost of producing each barrel of oil or each cubic foot of gas. Pete 636 horizontal, multilateral and intelligent wells. Coiled tubing drilling coiled tubing is continuous, smalldiameter steel pipe stored on a reel at the. A reservoir is said to be compartmentlized when the free flow of fluids is hindered spatially. Reporting procedures for multilateral and multizone wells.
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