Multilateral completion systems allow the drilling and completion of multiple lateral boreholes within a single mainbore. The system also provides reentry capability to access the laterals throughout the completion for the life of the well. Well completion well completion is a process that takes place after a oil or gas well has been verified to be commercially viable. Pdf files require the adobe acrobat reader to open and print. The inflow performance models of horizontal, undulating, and multilateral wells are developed in this study. Hill is an expert in the areas of production engineering, well completions, well stimulation, production logging, and complex well performance horizontal and multilateral wells and has presented lectures and courses and consulted on these topics throughout.
Completion design optimization of multilateral well to maximize hydrocarbon production in a bottom water drive reservoir 1manish kumar, 2dr. An improved semianalytical approach for predicting horizontal and. Economic and productivity evaluation of different horizontal drilling. An overview to applicability of multilateral drilling in the middle east fields. Multilateral wells display the same benefits that horizontal wells also do. Well completion options and its impact on well performance for horizontal and multilateral wells are summarized. Multilateral, intelligent well completion benefits explored. Schematic showing the components of a smart multilateral well. If so, share your ppt presentation slides online with. Completion therefore has to wait for formation testing after a design well depth has been. Multilateral wells make it possible to connect several well paths to one wellbore.
The advantage of a liner completion is that the drilling fluid system can be changed and a nondamaging fluid used to drill the pay interval. Laterals are completed openhole or with uncemented or cemented. The models can be divided into two main categories. Development of oil and gas fields using horizontal wells with multistage hydraulic fracturing, multilateral wells and multibranch wells is a highpriority direction of advancement for the oil and gas indus. Adding a lateral bore onto an existing new well requires an incremental 30% drilling and completion capital expenditure. Multilateral well configurations generally, the productivity of a horizontal well is two to five times more than the. In critical operations, you can rely on experienced teams and proven technology. These completion experiences are discussed in the case history section of this paper.
Unesco eolss sample chapters petroleum engineering upstream horizontal and multilateral well technology sada joshi encyclopedia of life support systemseolss figure 2. In 1997, technology advancement for multilaterals taml, an industry consortium of operators and service companies, was formed to categorize multilateral wells by their complexity and functionality. Multilateral well completion systems for shale schlumberger. Completion design optimization of multilateral well to. Several types of liner completions are commonly employed in well completions. The number of multilateral well completions has increased substantially in the last several years due to advances in directional drilling and completion systems. Worlds first level 6 intelligent completion drilled. Review an interview and made documents about his technique. Hill is associate department head and holder of the robert l. In fact, the multilateral system is based on several wells, all derived from one initial well.
Multilateral well definition and meaning collins english. Key issues in multilateral technology schlumberger. Workshop on multilateral and extended reach wells is the property of its rightful owner. Product sheet slic selective lateral intervention completion system costeffective rigless interventions in multilateral wells.
Multilateral well completion systems for shale plays enable confident, reliable well reentry and expansion while minimizing surface costs. This allows for alternative wellconstruction strategies for vertical, inclined, horizontal, and extendedreach wells. Smart well technology, also known as intelligent well completions iwc, is one of such. In the early days of the oil industry, drilling wells was a simple. As with any completion, design must address reservoir type, drive mechanism, fluid properties, well configuration and any other complications that might exist, such as sand influx and water and gas coning. Historically, a multilateral well would feature intelligent completions or lateral intervention capability but not both. After running the liner in the second leg, the completion can be run, and a second packer can be installed and stabbed into the lower packer. The research in this paper provides rapid productivity prediction method for stacked well completion design.
It uses the successful multilateral washover operation and achieves hydraulic integrity using cement. Assessment and evaluation of degree of multilateral wells. Pdf current drilling costs may exceed more than million dollars for each well. An overview to applicability of multilateral drilling in. Lateral drilling over horizontal drilling for marcellus shale field. The flexrite multibranch inflow control mic system is the newest variant of the awardwinning flexrite isolated tieback system, allowing a multilateral well to be completed with sand screens, swellable packers, inflow control devices icds and interval control valves icvs to help maximize production from each multilateral leg. Creating a multilateral well also allows for the elimination of a subsea tree and upper completion for. As part of the field development plan novatek, russias largest independent natural gas producer, recently planned an extended reach drilling erd campaign at the yurkharovskoye field, in the northern part of western siberia, russia. It is important to understand, that taml codes refer to junction, but not to whole well design. The a24 well provides an example of how multilateral completions can bring. Pdf assessment and evaluation of degree of multilateral wells. Laterals are completed openhole or with uncemented or cemented liners.
Drawing from the industrys broadest portfolio of proven products and inventive technologies, baker hughes, a ge company bhge, works with you to design completion infrastructure and well integrity. Gwdc multilateral drilling and completion technology. Well completion petronas free download as powerpoint presentation. Drilling, completing and later reentering wells with multiple branches to improve production while. However, the long horizontal wellbore can pose some serious production problems. A new multilateral technology is developed based on the solid expandable tubular set fixing system.
Development and assessment of well control procedures for. Single string selective single dual string gravelpack slim well monobore horizontal multilateral twin well triple well y block completion smart intelligent well. This allows for alternative well construction strategies for vertical, inclined, horizontal, and extendedreach wells. The numerical simulation results show that the multilateral wells usually help improve. To download this file you first sign in to your schlumberger account. By integrating intervention capability through the completion and the junction, the technical, economic and operational barriers of intervening in each lateral are removed. Pdf 26 pages the compatibility of the drilling and gravel pack fluid helps maintain the. Wellcompletion effects on the performance of horizontal and multilateral wells. Production performance starts with an exceptional completion from the reservoir to the production facility.
Failure of a multilateral well comsol multiphysics. Capacity well means a well completion with two or more tubing strings producing or capable of producing from the same reservoir see exhibit 10. The type of well completion affects horizontal well performance, and certain types of completions are possible only with certain types of drilling techniques. By employing the concept of well interference and the joshis expression for horizontal well performance, a mathematical model for computing multilateral wells performance has been developed. Well completion petronas fuel production petroleum. Unlocking production with multilateral wells hart energy.
Successful multilateral and horizontal wells require new considerations, interdisciplinary planning, and special techniques. Multilateral well drilling and completion plays an irreplaceable role in increasing single well output, tapping marginal reservoirs, enhancing oil recovery, and reducing the cost per tons of oil produced. The basic applications and techniques for multilateral wells will be covered and participants will receive instructions on planning and evaluating horizontal wells based on the objectives of the horizontal well, and how to perform the proper planning for directional and horizontal well. There exists a very large number of successfully drilled and completed open hole multilateral wells. When conducting drilling, well completion and wireline logging in horizontal wells using ct, helical buckling of the tubing in the vertical section. By this new technology, every kinds of tool in drilling, completion, well repair, and oilformation improvement are located and operated according to downhole setfixing equipment.
Horizontal and multilateral wells completions and stimulation. Multilaterals can be constructed in both new and existing oil and gas wells. In general, a study found that multilateral wells perform better than single horizontal wells. Meanwhile, drilling technology development introduced the option of multilateral wells zhou et al. In coning situations, such as production of oil reservoirs with a bottom aquifer or a gas cap, utilization of multilateral wells will reduce the detrimental coning effect, then leading. The setting of the production packer with a mechanical plug allows the lower leg in a multilateral well to be isolated and remain underbalanced while the second leg is drilled. This intense course focuses on the critical need for a proper understanding of all aspects of horizontal and multilateral design and completion. Also it can be undimensionalized in a format that is representative not only for. Petroleum engineering upstream horizontal and multilateral well technology sada joshi encyclopedia of life support systemseolss the chapter also describes various oil fields where horizontal and multilateral wells are used. The ne intan a24 well, in addition to being the worlds first intelligent completion in a level 6 multilateral well, is the first taml level 6 multilateral well drilled in indonesia. The closed form model applies for relatively low vertical permeability formations for the singlephase system and two. Well completion involves casing, temperature and pressure evaluation and equipment installation to allow gas or oil drilling. Ppt workshop on multilateral and extended reach wells. Multilateral, intelligent well completion benefits.
Florite multilateral completion system the florite multilateral completion system is specifically designed for wells that require complete junctionpressure isolation. The taml level 6 is the highest rating given in the taml multilateral rating system. An integrated development approach with a multidisciplinary design team and direct producing company involvement was used in development of this technology and was critical to achieving its success. A horizontal well is one that is typically drilled parallel to the bedding plane of an oil or gas bearing reservoir. As a sequel to advancement in drilling and completion technology, there has been. The assembly of a smart well system possesses the following components which direct towards a stabilized and. A multilateral well multilateral wells have multiple completion options. The number of wells, their orientation, disposition and inclination to the vertical, as well as the chosen type of completion and isolation, have led to the development of a number of. Currently, 71 multilateral or fishbone wells taml15 have been drilled and. From a conventional well to the most complex subsea multilateral, superior, sustained production depends on a superior completion. Tubingless completion multilateral completion sand control completion planning concept selection work. Whether its a conventional well or the most complex subsea multilateral, we make it our business to understand your completion challenge.
Thus, well length, the well s physical location in the reservoir, the tolerance in drilling location, and the type of completion that can be. Liner completions are similar to open hole completions in that casing must be set prior to drilling the producing interval. Horizontal well means a well with a borehole whose angle ofdeviation is 75 degrees or greater for more than. Multilateral drilling and completions applications in practice. A multilateral well is a well that has more than one branch radiating from the main.
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