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LEAding Edge Advantage (LEA) joined Senergy in August 2008, thereby creating Senergy LEA - the worlds largest independent, principal advanced drilling and subsurface capability specialising in Advanced Drilling Techniques (ADT).
Our unique ADT experience, gained from some 11 years of international operations, has resulted in a number of world and industry firsts which to this day continue to set us apart. Our ADT capability, when linked to Senergy’s in-house specialisms such as geomechanics, reservoir engineering, formation damage, performance drilling, production engineering, means we are uniquely positioned to offer unparalleled levels of customer service. From the initial ADT opportunity evaluation right through to project execution of a single well, through to full field redevelopment or rejuvenation, we can provide as little or as much support as is required from the involved and selected (your choice) disciplines.
Our philosophy is to ensure that each project is given the best chance of success by providing experienced, hands-on project staff with direct ADT experience; this way we increase the probability of successful operations for all our clients.
MPD is an ‘adaptive’ drilling technique used to precisely control the annular pressure profile throughout the wellbore. MPD has already proven itself to be highly effective in handling a range of drilling problems, including HPHT, narrow margin, severe fluid loss and wellbore ballooning situations. MPD may be accomplished by many means including combinations of backpressure, variable fluid density, fluid rheology, circulating friction and hole geometry. Containment used in this context means that MPD is focused not on creating a pressure draw down across formations, which may produce hazardous flow products, but of any flow incidental to the operation which is safely contained using an appropriate process. The key benefits and motivators for MPD are:
- Facilitates drilling in narrow pore and frac pressure regimes
- Drilling through varying pressure regimes coupled with depletion issues
- Reduces drilling related problems
Although an advanced drilling technique, the earliest UBD patent can be traced back to the mid 1800s. However, it is safe to say it has evolved into a technically and commercially viable option with its many benefits increasingly recognised and acknowledged. With improved production and overall improved ultimate recoverable reserves, UBD has found its place in the industry.
Benefits and advantages of UBD
- reduced formation damage – increased production
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- drilling through depleted zones
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- reduced stimulation – no need to clean well up
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- eliminates differential sticking
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- reservoir characterisation – improved formation
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- evaluation, fracture identification
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- minimise, remove lost circulation issues
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- improved ultimate recoverable reserves
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All the above can be distilled down into three main themes;
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Improved drilling performance
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Improved reservoir performance (increased asset value)
- Improved reservoir knowledge
The biggest single risk to the well and so the reservoir is the availability and appropriate application of experience. Senergy LEA has extensive international UBD expertise, providing project managers, engineers and well site supervisors to the onshore and offshore UBD market. All related subsurface disciplines, geomechanics, reservoir engineering, formation damage, performance drilling production engineering and technology are also available where required to supplement or complement your UBD operations.
The application of ‘Slimhole’ Through Tubing Rotary Drilling (TTRD) and Sub Sea Through Tubing Rotary Drilling (SSTTRD) has proven an extremely cost-effective method of accessing reserves which otherwise might have been uneconomical to develop. As the name suggests, by utilising existing wells in mature reservoirs, infill wells, stranded or near well bore, reserves are accessed through the existing completion tubing particularly attractive in a high cost a sub sea environment.
Experience in TTRD wells is maturing as more wells are drilled, but they still cannot be considered routine operations, particularly in a new environment. It requires knowledge and experience of the processes and equipment involved unique to TTRD to ensure operational success. Our in-house expertise has been responsible for a number of world and industry firsts and as result Senergy LEA is widely acknowledged as the independent world authority in TTRD operations evidenced for example by the ground breaking introduction of the world’s first Sub Sea TTRD well on behalf of Norsk Hydro.
Coiled Tubing Drilling (CTD) offers many benefits not normally associated with jointed pipe operations. Designed to work in a live well pressure envelope, coiled tubing lends itself perfectly to underbalanced and managed pressure drilling options. More importantly, it operates as a stand-alone drilling option; whether deployed as a concurrent or SIMOPS operation on production platform, to a bare foot facility such as a barge. Senergy LEA has in-depth worldwide experience in the project management, engineering and site supervision of onshore, offshore platform, semi-submersible and barge CTD operations. The key to the success of any CTD operation is candidate well selection and its here Senergy LEA’s knowledge and experience is the key differentiator.