Using seismic and well data for while‐drilling litho‐pressure prediction – a case study

Nawab, Ramin; Esquier, P.; Séjourné, Claude; Benazet, B.; Gohaud, Humbert; Lehec, Anne; Hessin, Philippe

doi:10.1190/1.2147907

Cited by 1 publication

(1 citation statement)

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“…Their lower frequency LWD seismic measurement counterparts, which are now being introduced to the industry, have the potential to detect pressure changes ahead of the bit 8,19,20 . Their lower frequency LWD seismic measurement counterparts, which are now being introduced to the industry, have the potential to detect pressure changes ahead of the bit 8,19,20 .…”

Section: Pore Pressure Prediction Ahead Of the Bitmentioning

confidence: 99%

High-Speed Wired Drillstring Telemetry Network Delivers Increased Safety, Efficiency, Reliability and Productivity to the Drilling Industry

Hernández

MacNeill²,

Reeves³

et al. 2008

All Days

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High-speed wired drill strings enable two way wireline communications between drilling and evaluation service provider's bottom-hole-assemblies (BHA) and surface systems. Compared to even the most advanced mud pulse telemetry, this new capability allows reliable communication with Rotary Steerable Systems (RSS), Measurement While Drilling (MWD) systems and Logging While Drilling (LWD) systems at data rates tens of thousands of times faster than ever before. This paper describes the system development and discusses in detail the advantages immediately attainable when complete, memory quality, drilling and evaluation data is provided instantaneously at surface while drilling. These advantages include:• increased safety by continuous downhole pressure, drill string dynamics and high rate drill string energy transmission data monitoring regardless of flow or rig state; • increased efficiency by optimizing RSS and bit performance, reducing hidden NPT, and monitoring wellbore conditions while drilling; • increase reliability by providing a redundant telemetry system and enabling the user to identify damaging drill string dynamics; • maximized productivity from more accurate wellbore placement.The paper will then further discuss how application of the system may further develop to maximize the value in accessing memory quality LWD data instantaneously via the wired pipe network while drilling. SPE 113157 Telemetry Drill String Technology OverviewFirst used in 2003, the IntelliServ Network offers an ultra high-speed alternative to current mud pulse and electromagnetic telemetry methods. The network utilizes individually modified drilling tubulars to provide bi-directional, real-time, drill string telemetry at speeds upwards of 57,000 bits per second. This greatly enhanced band-width in comparison to existing technology makes it possible to obtain large volumes of data from downhole tools (and other measurement nodes along the drill string) instantaneously, greatly expanding the quantity and quality of information available while drilling.The network utilizes a high strength coaxial cable and low loss inductive coils embedded within double-shouldered connections in each tubular joint to convey information. Signal repeaters are placed periodically along the drill string to ensure an acceptable signal to noise ratio is maintained. These repeaters serve as individually addressable nodes within the telemetry network and therefore also provide a location at which potentially valuable measurement data can be acquired. Currently available telemetry tubulars include various sizes of drill pipe (in both range 2 and range 3 lengths) 4 , heavy weight drill pipe, drill collars, drilling jars and a wide array of other bottom hole assembly components.The key physical components of this telemetry network are illustrated in FIGURE 1 below. Additional details of the underlying network technology may be found in IADC paper "Intelligent

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