Multilateral, intelligent well completion benefits. However, the long horizontal wellbore can pose some serious. Multilateral completion systems allow the drilling and completion of multiple wells within a single wellbore. Multilateral and extended reach wells training youtube. A typical smart well is equipped with a special completion that has packers or sealing elements which allow partitioning of the wellbore. The assembly of a smart well system possesses the following components which direct towards a stabilized and. 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. The twoleg multilateral well was drilled and completed from the ne intan a platform in the south java sea, indonesia, in approximately 75 ft of water, during the fall of 2002. The recent evolution of multilateral technology introduced a large variation of completion options for multilateral wells. In the past, multiple vertical wells were drilled to increase recovery.
Multilateral well completion systems for shale schlumberger. This intense course focuses on the critical need for a proper understanding of all aspects of horizontal and multilateral design and completion. Multilateral well completion systems for shale plays enable confident, reliable well reentry and expansion while minimizing surface costs. 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. 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. Enhanced initiative for heavily indebted poor countries completion point document and multilateral debt relief initiative this paper was prepared by staffs of the international monetary fund and the world bank in connection with the executive boards consideration of guineas completion. Multilateral wells are new evolution of horizontal wells in which several. A tubular string is inserted through an inner tubular structure of the apparatus, through the opening. The completion apparatus has an opening in its side which is rotationally aligned with a window in the parent wellbore casing. Single tubing completion single string sequential completions. The process encompasses technical, economic and risk analysis of various alternatives in the completion of a well vertical, horizontal or multilateral by using a well performance model for technical evaluation, and a deterministic analysis for economic and risk assessment.
Gwdc multilateral drilling and completion technology 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. Unfortunately, drilling engineers must often mechanically stabilize multilateral wells with a liner or casing, which can cost millions of dollars. This course is designed to better advance well concepts including horizontal and multilateral wells as they have become a dominant feature of new field development and redevelopment opportunities. These cost savings are in addition to the service capital expenditure costs structures, wellheads, pipelines and operating expenses. Multilateral well configurations generally, the productivity of a horizontal well.
Multilateral well is a well completed in two or more zones, also has a great potential to optimize oil well production. Interactive flowcharts of each substantive provision as well as an application toolkit. Laterals are completed openhole or with uncemented or cemented. Florite multistring multilateral completion system taml level 5.
Meaning, pronunciation, translations and examples log in dictionary. Results obtained show that an investment in smart completions for the multilateral well ultimately yields a higher net cash. Failure of a multilateral well comsol multiphysics. Many of these options are simple and basic while others are complex. In general, a study found that multilateral wells perform better than single horizontal wells. 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. The recent advancement of the multilateral and completions technology. A multilateral well multilateral wells have multiple completion options. At present, in view of the multilateral well completion, most of the multilateral wells in the world adopt open well completion of level 1 and 2 and. Multilateral technology multiplies these benefits by adding more reservoir exposure per well, and more exposure per drilling and completion dollar spent. The complexity of these wells with drilling and completing the extreme extended reach wellbores, multilateral junctions, intelligent well completions, preexisting well integrity conditions and simops, which in conjunction with the nature of the regulatory environment, the tight rig schedule and the downturn in global oil price provided many. A multilateral well is a well that has more than one branch radiating from the main. Historically, a multilateral well would feature intelligent completions or lateral intervention capability but not both.
Add branches and production to existing wells in mature fields. Horizontal, extended reach, and multilateral drilling. Hill is associate department head and holder of the robert l. A novel expert system for multilateral well completion. A well with two productive laterals is referred to as a dual lateral well. Halliburton multilateral systems can help enhance reservoir management and increase. Economics driving trend toward less complex junctions. Multilateral wells make it possible to connect several well paths to one wellbore. In addition to the main wellbore, there are one or more lateral wells extending from the main wellbore. The existence of compartmentalization in oil and gas fields have been a major industry challenge for decades. Current drilling costs may exceed more than million dollars for each well. The numerical simulation results show that the multilateral wells usually help improve. Horizontal and multilateral completions conventional single zone completion open hole completion this is the simplest of all completion types, where casing is run and cemented just above the produc. Ep0701045a3 multilateral well drilling and completion.
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. Pdf current drilling costs may exceed more than million dollars for each well. Abstract multilateral drilling and completion technology is a very fast. 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. Multilateral applications pose a distinct set of production challenges and halliburton offers specially designed completion systems that allow reentry access into laterals and lower mainbore, along with isolation and flow control of laterals and lower main zones. This course covers both conventional and unconventional reservoirs. Ung operations s11r s rllft hcok 111ntral tool to putt iollf n ck. Worlds first level 6 intelligent completion drilled.
Production performance starts with an exceptional completion from the reservoir to the production facility. Us6830106b2 multilateral well completion apparatus and. Multilateral wells offer the potential for substantial improvement in well economics 15. We offer systems that meet all taml level standards. Address extendedreach and unconventional gas requirements with the industrys most diverse multilateral tools portfolio. A horizontal well constructed with more than one productive lateral branching off a main wellbore is a multilateral well. A successful multilateral well that replaces several vertical wellbores can reduce overall drilling and completion costs, increase production and provide more. The system also provides reentry capability to access the laterals throughout the completion for the life of the well. Completion design optimization of multilateral well to maximize hydrocarbon production in a bottom water drive reservoir 1manish kumar, 2dr. Depending on the completion system incorporated into a multilateral well, it may no longer be possible to simply rig up on a well to often, run production logs or to add perforations. A recent enhancement of multilateral wells combined with intelligent completions control of each lateral is the ability to intervene in each lateral through the completion. A comprehensive model of multilateral well deliverability.
Unesco eolss sample chapters petroleum engineering upstream horizontal and multilateral well technology sada joshi encyclopedia of life support systemseolss figure 2. Multilateral well definition and meaning collins english. Well completion options and its impact on well performance for horizontal and multilateral wells are summarized. View l11 horizontal and multilateral well completions. A study examined the potential benefits of multilateral and intelligent completions over single horizontal laterals. Horizontal and multilateral wells completions and stimulation. Examining 22 years of actual multilateral well applications to determine true reliability multilaterals are often cited as technology that can be implemented to maximize reservoirrecovery rates. The multilateral instrument mli responds to this call for. If, however, additional perforations are added to an soi completion in the same reservoir, the producing interval code remains sol since the completion is still producing from the same reservoir or commingled situation. Thus, well length, the well s physical location in the reservoir, the tolerance in drilling location, and the type of completion that can be.
To learn more about how we can minimize costs and maximize sweetspot exposure, please complete the contact form below. The wide array of multilateral junctions, completion tools, and accessory equipment can satisfy all of your production and operational needs. In multilateral well completions, two or more horizontal wellbores are drilled from a single parent wellbore, enabling drainage of multiple reservoir targets. Whether its a conventional well or the most complex subsea multilateral, we make it our business to understand your completion challenge. This phenomenon introduces some complexity and uncertainty in the prediction of well productivities and the overall hydrocarbon recovery factor.
Multilateral drilling and completions applications in practice. Pdf assessment and evaluation of degree of multilateral wells. The type of well completion affects horizontal well performance, and certain types of completions are possible only with certain types of drilling techniques. In a multilateral well, some components complement the planned completion, whereas other completion components are defined as. Multilateral completion systems allow the drilling and completion of multiple lateral boreholes within a single mainbore. Completion of steps to undertake to sign the mli by many other jurisdictions ex.
It is important to understand, that taml codes refer to junction, but not to whole well design. Apr 11, 2017 in this study, the records of one multilateral service provider have been analyzed from more than 800 actual multilateral installations, and success and failure rates have been determined. 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. Assessment and evaluation of degree of multilateral wells. The ne intan a24 well, in addition to being the worlds first intelligent completion in a level 6 multilateral well. Languages english and french text authentic translations being developed by individual countries and published on the oecd website oe. Thus, well length, the wells physical location in the reservoir, the tolerance in drilling location, and the type of completion that can be achieved, strongly depend upon. In a described embodiment, a multilateral well completion system includes a completion apparatus installed in a cased parent wellbore. The reliability of multilaterals has been compared with the reliability rates of other wellbore completion and construction technologies. Also there is a dearth of information on methods to compute productivity, to devise procedures to evaluate the completion efficiency, and to forecast performance of the completion. Pete 636 horizontal, multilateral and intelligent wells. Completion design optimization of multilateral well to. However, few operators have been willing to put multilaterals into practice.
In this method well is completed for single zone with single tubing. Adl is focused on cost effective multilateral completions for enhanced sidetrack and new well applications. This allows for alternative well construction strategies for vertical, inclined, horizontal, and extendedreach wells. Mrc can achieved using horizontal wells, multilateral wells and extended reach drilling erd. Multilateral well configurations generally, the productivity of a horizontal well is two to five times more than the. Florite multilateral completion system the florite multilateral completion system is specifically designed for wells that require complete junctionpressure isolation. Currently, 71 multilateral or fishbone wells taml15 have been drilled and. Multilateral completions on rise but still a niche. Monitoring and control of smart wells stanford university. Several methods have been presented to determine productivity indices or skin values for multilateral well systems 611. The most frequently cited reason for not considering multilaterals is risk. Key issues in multilateral technology schlumberger. Technical, economic and risk analysis for a multilateral well. Petroleum engineering upstream horizontal and multilateral well technology sada joshi encyclopedia of life support systemseolss in cases where rig size is limited, but one wants to drill a long well with a large contact area, multilateral wells provide an option.
Successful multilateral and horizontal wells require new considerations, interdisciplinary planning, and special techniques. With our industryleading tools and experienced multilateral reentry crews, we deliver consistent service excellence with a clean, properlyangled casing exit. This books contains information on reservoir geology, drilling multilateral wells, multilateral well completion and performance. Fundamentals of petroleum engineering well completion and.
Multilateral, intelligent well completion benefits explored. Gwdc multilateral drilling and completion technology. Simple vertical profile of a horizontal well, illustrating basic terms. Team with experience of multilateral completion projects for exxon, woodside, saudi aramco, koc, lukoil caspian sea. A new multilateral technology is developed based on the solid expandable tubular set fixing system. All the reservoirs available in a well are produced simultaneously through single string. Directional drilling technology is being pushed further with increasingly complex well paths, distant targets, and more difficult drilling environments. Benefits of multilateral well design horizontal multilateral completion allows the placement of the junction in the reservoir, reducing overburden drilling, casing and cementing costs. Unlocking production with multilateral wells hart energy. Multilaterals can be constructed in both new and existing oil and gas 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.
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