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Fluids moving in the well system have thermal mass and can heat or cool the areas they touch. These temperature changes carry valuable information about fluid behavior, especially flow rates and profiles. The trouble is, the physical laws of thermodynamics and fluid dynamics are incredibly complex, and the interactions between them even more so. The 3D world of metal, concrete and earth we call the well system adds more complexity. Extracting accurate flow data from this environment may seem like an impossible task. But not for Cascade. Twenty years ago, TGT founded its business on transforming temperature changes into flow information, and since then we have taken this capability further than anyone. Today, Cascade delivers that capability through our ‘True Flow’ products to reveal flow like never before. Cascade ArchitecturePrograms & MethodsAnalysts customise proprietary diagnostic programmes, activating well system behavior to expose targeted thermal and fluid dynamics.Analysts customise proprietary diagnostic programmes, activating well system behavior to expose targeted thermal and fluid dynamics. Tools & MeasurementsCascade uses fast-response, high resolution temperature sensors from the Indigo platform to make accurate answers.Cascade uses fast-response, high resolution temperature sensors from the Indigo platform to make accurate answers. Processing & ModelingCascade uses fast-response, high resolution temperature sensors from the Indigo platform to make accurate answers.Cascade uses fast-response, high resolution temperature sensors from the Indigo platform to make accurate answers. Analysis & InterpretationPowerful 3D thermofluid modeling code, unique to TGT, reconciles all critical well system elements including reservoirs, completion components and fluid type to produce accurate flow profiles. Automated modeling code rapidly resolves the ‘answer’ from the input data. Parallel processing makes thousands of calculations, accurately solving multiple thermofluid equations.Powerful 3D thermofluid modeling code, unique to TGT, reconciles all critical well system elements including reservoirs, completion components and fluid type to produce accurate flow profiles. Automated modeling code rapidly resolves the ‘answer’ from the input data. Parallel processing makes thousands of calculations, accurately solving multiple thermofluid equations. ProductBy offering critical well diagnostic capabilities, our products provide a vital link between the visionary designs for the latest technologies devices and the companies that produce them.By offering critical well diagnostic capabilities, our products provide a vital link between the visionary designs for the latest technologies devices and the companies that produce them. Tools TGT adds real-time functionality for a range of diagnostic systems across multiple downhole barriers. A new technology in real time improves the convenience, flexibility and accuracy of high-performance equipment for borehole diagnostics in the oil fields. The new real-time technology allows you to view and analyze well data on the surface when performing well diagnostics programs without compromising measurement accuracy. Pedigree 20-years of pioneering scientific research, ingenuity and direct field experience in applying thermal flow diagnostics to thousands of well systems globally. Advancing industry knowledge in thermofluid dynamics with more than 70 recognised industry publications. Expertise in thermodynamics, fluid dynamics and 3D numerical modeling. Engineered entirely in-house at our technology centre. Tested and proven in thousands of well systems for more than 70 international operators. Resources Product animations(21) Hardware specifications(5) Platform flyers(6) Product animations(21) Product Media
Our first two series of #TechTalks were a resounding success and we've been asked to run more! Hence, we are delighted to launch our 3rd series of #TechTalks. Once again the topics are diverse and reveal a range of powerful well system diagnostics that would help you to maintain safe, clean and productive well operation. #TechTalk No. 7 Diagnosing flow and integrity challenges in dual completions Managing the performance of dual completion wells is challenging. Limited access to the short-string reservoir and complex geometry conspire to hide flow and integrity issues from traditional diagnostic techniques, undermining the success of well management decisions. In today’s climate, ambiguity is no longer an option. Discover how TGT’s ‘Dual String Flow’ and ‘Dual String Integrity’ products enable a more complete understanding of flow and integrity dynamics in dual completions, improve decision making, and help keep wells safe, clean and productive. Presented by: Vasily Skutin, Principal Domain Champion, TGT REGISTER NOW #TechTalk No. 8 Diagnosing flow challenges in horizontal wells with smart completions Horizontal wells are notoriously challenging to diagnose correctly. Complex flow geometry and equally complex completions can task even the most sophisticated wellbore diagnostic techniques. Join us to see how our ‘True Flow’ system senses beyond the confines of the wellbore to reveal a more complete understanding of flow dynamics in horizontal wells, even in the most complex scenarios. Presented by: Vener Nagimov, Principal Domain Champion, TGT REGISTER NOW #TechTalk No. 9 Diagnosing conventional/alternative well barriers to enable rigless abandonment The P&A purpose is clear; for the plugged well to maintain its abandonment integrity until the natural pressures within the borehole and formation return. Two techniques are rising in popularity. One is rig less abandonment and the other is replacing the use of cement as a permanent barrier to an alternative such as Bismuth or shale. In this #TechTalk, we discuss furthering the use of through-barrier diagnostics until the final stage of P&A—when only the tubing/casing remains. Our new patented approach can be used in the pre-abandonment phase and evaluates the isolation of cement/alternative materials behind the first and second casing. This prior knowledge enables the pre-selection of candidates for rigless abandonment, thus leading to a reduction in cost, resource and carbon emissions. Presented by: Maxim Volkov, Principal Domain Champion, TGT REGISTER NOW If you have any questions, please don’t hesitate to email us. Or, if you have a suggestion for a #TechTalk you would like us present, please email: firstname.lastname@example.org.
Integrity and corrosion assessment for successful slot recovery and plugging & abandonment (P&A) applications Article featured in Oilfield Technology For all plug and abandonment applications, either permanent or for slot recovery, the sealing performance of well system components needs to be assured, and remain intact. Well systems are complex and need to work perfectly to perform safely, cleanly, and productively. Understanding the condition and sealing performance of well system barriers can be challenging once the well has been brought onstream and access to these elements and components is restricted. Current mainstream technologies only provide partial answers, leading to an incomplete assessment. However, through-barrier diagnostics look at the well system in a far more holistic and uncompromising way. These technologies have the capability of seeing through multiple barriers to provide a more complete picture of the condition of the metal tubulars and the flow around them to see if the seals are holding, prior to plug and abandonment. In the case of permanent abandonment, natural barriers that prevent the movement or migration of downhole fluids, must be restored. And the performance of the well system barriers must remain intact indefinitely. In the case of slot recovery, the well components must be in good enough condition to be used again for the upcoming production cycle. A comprehensive integrity assessment is required for either scenario. Optimising P&A operations Planning and executing a flawless plug and abandonment requires prior knowledge of the integrity of the well barriers, and the precise position of all downhole completion elements. Operators armed with this information can determine the location of the permanent plugs and the best depths for the casing cuts for an optimised retrieval procedure. During the productive life of a well it may experience several operator changes, perhaps after concessions expire or following divestment decisions. This can often lead to historical data being lost which, when it comes to well decommissioning, can increase the potential for making decisions without knowing all the facts about the well system, particularly the position of the casing collars, fins, centralisers or other components that impede successful decommissioning. Using a simple multifinger caliper or an ultrasound survey, the location of the first-barrier casing collars can be determined, but the locations of the collars in the subsequent casing strings remain unknown. This approach contains an element of risk and may result in a cut planned directly in line with a thick section of metal, like a casing collar, or fin. Cutting across a collar or a fin, would mean an increase in the rig and intervention time of several hours, or potentially days. TGT’s Multi Tube Integrity product uses the Pulse electromagnetic sensing platform to provide accurate barrier-by barrier assessment of up to four concentric tubulars (up to 20” diameter) in one single through-tubing deployment. Pulse can also pinpoint to within 1ft the location of completion elements. The ‘electromagnetic signature’ of each tube or metal completion component, contains information about its wall thickness. The Pulse platform harnesses this information and through 3D modeling, can decipher metal loss as well as metal gain, in multiple casing strings throughout the entire well system. Pulse can identify the location of known completion elements, but also identify new ones, not expected including welded fins on the outer casing string, often inaccessible to other evaluation technologies. If Multi Tube Integrity is used prior to the P&A planning, the diagnostic results would remove the uncertainty allowing operators to confirm the optimum cutting window location in all casings, thus minimising the intervention time and reducing rig time and costs. Integrity & corrosion assessment for slot recovery Slot recovery offers operators a way of capitalising on existing assets, by providing a new means of extending a well’s productive life. It is a robust solution which utilises the existing surface and downhole infrastructure, to create a “new” offshoot well, which would reduce the costs associated with drilling. However, before this can become a reality, the inspection of downhole completion elements such as surface casing and its cemented annulus are a must. Limitations in current technologies have meant that barrier verification is performed while the rig is in place, and once the tubulars (production and intermediate casings) have been retrieved. Key input parameters, such as the cement condition and the integrity of the casing are obtained at the last stage of the planning. The late arrival of this critical information results in a complex well intervention plan, with several contingent scenarios based on a range of potential outcomes from the downhole integrity assessment. The industry is calling for a new solution. One which can determine the condition and sealing performance of the cement and the metal barriers, prior to planning the slot recovery. Pulse data showing wall thickness, collars and completion elements in 5 ½ in., 9 5/8 in., 13 3/8 in. and 20 in. tubulars. A powerful diagnostic combination TGT’s Multi Tube Integrity product used together with the Multi Seal Integrity product is the answer. This powerful combination utilises TGT’s Pulse electromagnetic platform, the Chorus acoustic platform and the Indigo multisense platform, and it can be deployed in one through-tubing deployment. Pulse is used to evaluate the metal thickness of multiple tubulars, including the surface casing. It also has the unique capability of being able to confirm the position of critical completion components, including collars, centralisers, and casing shoes. Chorus is used to assess the hydraulic seal integrity of the cement barrier to determine where the cement is sealing and where it is not. Fluid flow in the well system creates a rich spectrum of acoustic energy that penetrates the surroundings. This acoustic wave is encoded with information that Chorus can convert into acoustic spectra that can locate leaks and flowpaths throughout the well system, from the wellbore to the outer annuli. The Pulse, Chorus and Indigo platforms are part of TGT’s True Integrity System which provides a clear diagnosis of integrity dynamics throughout the well system. The key to success It is critical that before slot recovery can be executed, there is an understanding of the collective integrity of the tubes, seals and barriers of the mother well. Only in doing this can there be a guarantee of the secure passage for pressurised fluids. The key to success for any P&A or slot recovery operation is knowing all the facts about the integrity of the well system prior to planning and execution. This delivers the potential to reduce costs, minimise schedule overruns, and ensures the integrity of the final outcome.