Mar 09, 2016 looking for oil in new complex areas pushes the drilling engineering to new limits. Speiadc 163487 case history of a challenging thinoilcolumn extendedreachdrilling development at sakhalin by vishwas p. Our courses provide the participants with a full understanding of extended reach design and fundamentals as well as little known insights gained from over 20 years extended reach and extreme reach. Spe 183786 hole cleaning and ecd management for drilling ultralongreach wells by feifei zhang, halliburton, et al. An extended reach well erw can be defined in many ways because it is still a subject of debate, but in. Oct 07, 2016 aberdeen, scotland aberdeens robert gordon university rgu, in conjunction with merlin erd limited, has developed a bespoke training course in extended reach drilling erd. Tunnel in the earth a new wellpath design, robello samuel, spe 119421, iadc amsterdam 2008. Analysis of postbuckling drillstring vibrations in rotary. Introduction to extended reach drilling erd drilling. In this perspective, erd assumes a critical role in current industry operations.
Current longreach technology already has a large effect on oil recovery. They are used for general purpose applications on mild steels, soft metals and nonferrous materials. Jun 23, 2015 horizontal drilling, overall, is more efficient and cost effective than vertical or slant wells once the well comes online. Infill drilling is the process of increasing the number of wells in an area by drilling wells in spaces between existing wells. History model for sand production during depletion.
This is third book in the series of solutions and applications. Horizontal drilling, overall, is more efficient and cost effective than vertical or slant wells once the well comes online. Extended reach and complex well drilling course by merlin. Drillstring vibration is a major contributor to downhole tool failure. Federal emergency management agency us formation integrity test. A history of fossil fuels in north dakota nd studies. Extended reach and complex well drilling course by merlin erd. Case history of a challenging thin oil column extended reach drilling erd. Extended reach drilling, or erd, of horizontal wells isnt a new idea. Timely detection and mitigation of downhole vibration is key to avoiding nonproductive time npt and preventing equipment damage. Pdf limit analysis of extended reach drilling in south. He was also one of the editors of the spe book advanced drilling and. Limit analysis of extended reach drilling in south china sea.
This paper focuses on the difficult technological problems encountered during exploiting the liuhua 111 oil field in the south china sea, china. Doyon drilling makes extended reach modifications to rig 15. Spe 170831 going longovercoming challenges in completing 3600m laterals by r. Pages in category deepest boreholes the following 7 pages are in this category, out of 7 total. As a result, customers plan to drill more complex threedimensional 3d horizontal extended reach drilling erd wells using advanced directional drilling technology, which sperry drilling is able to provide. Overcoming challenges of drilling three mile laterals. Exxon neftegas limited a subsidiary of exxon mobil corporation completes the drilling of the z11 well, the longest measured depth extendedreach drilling erd well in the world. Drilling the first horizontal well in the gulf of mexico. This paper details issues related to torqueanddrag prediction, monitoring, and management in erd wells. Extended reach wells make it possible to produce offshore fields from onshore drilling locations and reduce the environmental impact of drilling by reducing the number of surface drilling locations.
Case history of a challenging thin oil column extended reach. Aberdeen, scotland aberdeens robert gordon university rgu, in conjunction with merlin erd limited, has developed a bespoke training course in extended reach drilling erd. Extendedreach wells are wells that have relatively long lateral offsets compared to true vertical depth. Advanced torqueanddrag considerations in extendedreach.
Extendedreach drilling erd has evolved from simple directional drilling to horizontal, lateral, and multilateral stepouts. This paper covers the 7year history of drillingfluids application in a reservoir. Extra length drill bits are used for drilling deep holes in hardtoreach areas. The kola superdeep borehole was the longest and deepest borehole in the world for nearly 20 years. Extended reach drilling erd is particularly challenging for directional drilling and requires specialized planning to execute well construction. The distance, or reach, of a well from the drilling rig to final bottomhole location can exceed six miles. Directional drilling optimization extended reach drilling. It is typically used in hydrocarbon drilling operations, but also geothermal. Limit analysis of extended reach drilling in south china. While the industry has made great advancement in the ability to drill further horizontal offsets the high specific weight of steel limits the reach of the completions, often leaving extended stretches of the well bare and susceptible to production losses or collapse.
An extended reach well erw can be defined in many ways because it is still a subject of debate, but in general it is defined based on the depth ratio. Reducedfriction centralizers fieldtested for ultraextendedreachdrilling. Since the term was coined, the scope of extendedreach drilling has broadened and the definition, which is now more flexible, includes deep wells with horizontal distancetodepth, or h. Extended reach drilling course launched by rgu, merlin. Nowadays, extended reach drilling erd becomes a state of art. Spe iadc 178148 combining technology and automation to overcome drilling challenges and deliver the longest extended reach well in kuwait. Todays challenges in erd are hole cleaning, managing the mechanical loads on the drill string and managing downhole pressure. The core of hxrs extended reach drilling services division is our onsite erd specialists.
Ddi is currently working on making extended reach modifications to ddi rig 15, which has been in operation offshore in alaska on spy island for eni since 2011. Spe 183786 hole cleaning and ecd management for drilling ultralong reach wells by feifei zhang, halliburton, et al. Our dedicated team of extended reach drilling specialists and wellsite advisors are amongst the most experienced, highly trained individuals in their field. After drilling into the selfish gene in greater detail that the eponymous work, the next three chapters do a fantastic job of advocating the view that the effects of genes their phenotype are not limited to body parts blue eyes, brown hair, etc. Schlumberger lwd and mwd services deliver highquality data to enable timecritical decisions for accurate drilling of extendedreach, horizontal, vertical, and complex directional wells and sidetracks. Wells with unusually long reach are called extended reach wells. A case history of east cameron block 278 well b12, author fisher, e. One of the most serious concerns of extendedreach drilling is the dynamic behavior of the drillstring and the cleaning of well. Extended reach wells are wells that have relatively long lateral offsets compared to true vertical depth. Introduction to extended reach drilling erd drilling course. In directional and extendedreach drilling, however, torques in excess of 80,000 lbfft are common and easily can cause twistoff to improperly selected drillstring components. Spe iadc 178148 combining technology and automation to overcome drilling challenges and deliver the longest extendedreach well in kuwait.
Good cleaning requires an increased angular velocity. Extended reach drilling is being pushed further with increasingly complex well paths, distant targets, and more difficult drilling environments. The term primarily refers to wells restricted to a platform or pad because of environmental or economic contraints that are attempting to access reserves at a significant distance. Reviewed in the united states on september 27, 1999 this giant book contains almost 1,500 pages and covers well drilling from prehistoric times to 1971, which is the book s publication date. The international petroleum industry has long been known the world over as a good. In may 2008, a new record for borehole length was established by the extended reach drilling erd well bd04a, which was drilled by transocean for maersk oil in the al shaheen oil field in qatar. Like the horizontal drilling in the 80s and 90s, producers could drill down into the ground, then make a curve to drill parallel to the ground. This causes a very limited well depth for extendedreach drilling. Extended reach drilling is directional drilling of very long horizontal wells. Looking for oil in new complex areas pushes the drilling engineering to new limits. Responsible for merlin erd ltds expert extended reach, horizontal, high angle and complex well operations and engineering training. Located on sakhalin island offshore eastern russia, the recordsetting z11 achieved a total measured depth of 37,016 feet 11,282 meters, or more than seven miles. In may 2008, a new record for borehole length was established by the extendedreach drilling erd well bd04a, which was drilled by transocean for maersk oil in the al shaheen oil field in qatar. This is a very important rock property in formation evaluation as it helps to differentiate between formations filled with salty waters good conductors of electricity and those filled with hydrocarbons poor conductors of electricity.
This paper describes the planning and successful execution of the highly challenging a9 extendedreach well designed as the first development of the g. Mobil oil company first used this term in the early 1980s for drilling directional wells in which the drilled horizontal reach hr attained at total depth td. Brae field extended reach drilling a case history onepetro. This paper describes the planning and successful execution of the highly challenging a9 extended reach well designed as the first development of the g sand interval. Extended reach drilling erd is directional drilling of very long horizontal wells. Around the year 2002, an oil boom began in the bakken formation new technology made it possible for oil companies to get the oil and gas out of the shale rock. Tracking drilling efficiency using hydromechanical specific energy, kshitij mohan, faraaz adil, robello samuel, spe 115714, iadc amsterdam 2008. Directionalextended reach wells society of petroleum engineers. The maximumallowable well depth while drilling of extended. Resistivity is the ability of a substance to impede the flow of an electrical current. Oil and gas reservoir in beaches or lakes and offshore can be effectively exploited by using extended reach drilling erd technology. The term primarily refers to wells restricted to a platform or pad because of environmental or economic contraints that are attempting to access reserves at a significant distance from the surface access point. Extended reach drilling engineering services hxr provides complete well engineering and design services, tailored to our clients specific well trajectory goals and rock stress properties.
Extendedreach drilling erd is particularly challenging for directional drilling and requires specialized planning to execute well construction. This specialized rig will be able to drill to 33,000plus feet, compared to the 22,000foot reach of current rigs. They are used for general purpose applications on mild. Kyle marshall midland basin extended reach drilling.
Since the term was coined, the scope of extended reach drilling has broadened and the definition, which is now more flexible, includes deep wells with horizontal distancetodepth, or h. In the 1970s, british petroleums wytch farm project was the first to use erd to reach deposits under poole bay, just off. I learnt my trade in the boom times of the 1970s and early 1980s as the price. In directional and extended reach drilling, however, torques in excess of 80,000 lbfft are common and easily can cause twistoff to improperly selected drillstring components.
Extended reach drilling in the gom ram powell case study. Doyons planning began in 2016 when eni approached ddi to make modifications for an extended reach exploration well, nik north exploration well nik north. Schlumberger offers expert directional drillers and proven technologies to provide the trajectory control needed to drill the well correctly, the highquality hole required to successfully run and cement casing, and the precise well placement to optimize production and maximize recoveryall leading to drilling optimization for optimal efficiency and cost savings. The beginning of the horizontal segment is the heel, and the end of the horizontal segment is the toe.
Timely detection and mitigation of downhole vibration is key to avoiding nonproductive. The cost to drill and complete this horizontal well was less than comparable extended reach development wells drilled in the same field. It can be positioned either above the drill bit or above a pilot assembly run inside the existing borehole numerous designs exist, in sizes varying from a couple of inches to above 40. Educating key drilling personnel in the very latest complex well drilling practices is key to identify the critical success factors to reduce drilling risk, time and cost. Good news for doyon drilling in early october, conocophillips announced it signed a contract with doyon drilling, inc. Trained in extended reach drilling techniques and offshore drilling operations, and with a focus in several specialized technical disciplines directional drilling and drilling fluids our erd specialists go out to your rig site and model upcoming trends in hydraulics, torque, drag, surgeswab. It may also cause hole damage and increase the need for more frequent rig repair. Training the strength of our trainers stems from our experience planning and successfully delivering challenging erd and horizontal wells around the globe for over 25 years.
Ddi to build a new extended reach drilling erd rig. Parker, by the 1960s parker drilling had set numerous world records for deep and extendedreach drilling. Since the drilling of the discovery well on viosca knoll block 912 in may 1985, five commercial pay sands have been logged between 5,500 and,500 ft subsea. Parting pipeparting failure occurs when the induced tensile stress exceeds the pipematerial ultimate tensile stress. This paper describes the experiences from drilling an extended reach well in february 2002 from a north sea production platform constructed to develop a gas condensate reservoir, into an adjacent mature black oil field that had been previously developed with subsea facilities.
Using extended reach drilling in the correct way would be more economical to companies since they can replace the need to drill several vertical wells. The success of this well proved that horizontal wells are viable alternatives to extended reach development wells from offshore platforms in the gulf of mexico. Limit analysis of extended reach drilling in south china sea article pdf available in petroleum science 62. This is a very important rock property in formation evaluation as it helps to differentiate between formations filled with salty waters good conductors of electricity and those filled with hydrocarbons poor conductors of.
This technology was called extended reach horizontal drilling. Erd employs both directional and horizontal drilling techniques and has the ability to achieve horizontal well departures and total vertical depthtodeviation ratios beyond the conventional experience of a particular field. The 24 best oil drilling books recommended by preston pysh, such as. An underreamer is a device used to enlarge the borehole below an existing casing or restriction, during a well drilling operation. This paper presents a 3d nonlinear dynamic model of drillstring in a wellbore of 3d profile. Richard dawkinss bestselling books have played a significant role in the renaissance of science book publishing for a general audience.
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