A COMPARISON OF HIGH-RESOLUTION TRAJECTORY METHODS AND THEIR IMPACT ON DRILLING DATA ANALYSIS

Wellbore trajectories are a fundamental piece of data used for decisions throughout the oilfield. Trajectories are typically mapped through measurement-while-drilling (MWD) survey stations collected at 95ft intervals. Previous work suggests that this sparse sampling interval masks short segments of high curvature, negatively impacting workflows that consume this data (Stockhausen & Lesso, 2003; Baumgartner, et. al., 2019). This can come in the form of poorly estimating the true vertical depth of a well, poorly mapping geologic structure, and poorly quantifying the tortuosity of the wellpath. Several methods have previously been proposed to improve trajectory mapping by incorporating additional data collected between stationary surveys (Stockhausen & Lesso, 2003; Gutiérrez Carrilero, et al., 2018). Two sources of such data are continuous survey measurements and slide/rotate behaviors captured in slide sheets. Two methods of improving the wellbore trajectory mapping were compared in several extended reach lateral wellbores. The impact of the new trajectories on landing point selection, dip estimation, and wellbore tortuosity analysis was determined. One method took continuous inclination data and mapped directional changes between stationary surveys. The second used bit projections generated through automated-slide-sheet analysis from real-time tool face data, estimating the location and direction of curvature produced by slide/rotate operations. These curvature estimations were used to predict wellbore shape between surveys. As a final check, in the curve sections of the wellbores, stationary surveys were collected at more frequent intervals (e.g., 31ft) to provide validation on the high-resolution trajectories and to understand the cost-benefit of simply surveying more frequently. Reach out to us to know in detail: https://www.helmerichpayne.com/resources/technical-publications/a-comparison-of-high-resolution-trajectory-methods-and-their-impact-on-drilling-data-analysis or you can also contact us here: https://www.helmerichpayne.com/contact. 

#wellboretrajectory #wellboretortuosityanalysis #drillingsurveymanagement #drillingSurveyaccuracy #WellboreSurveys

Comments

Post a Comment

Popular posts from this blog

DrillScan® Digital Solutions PRESENTS Advanced Well Engineering - Tailored software for smarter, efficient, failure-proof drilling!

Image
  HOW WE HELP We accelerate well delivery and maximize well lifespan for energy operators through physics-based modeling and drilling expertise AWE offers constant performance improvement for the client by leveraging the extensive experience of our engineering team and DrillScan® digital solutions. BitScan™ Software for auto processing, validation & export of PDC models. WellScan ® Advanced suite for quick and accurate well engineering.   LiveScan™ & REST APIs Integrated real-time solution for drilling monitoring & optimization. WHO WE ARE A century of achievement. A reputation of excellence. We are a drilling engineering and R&D team renowned for pioneering the development and implementation of industry-leading physics-based models. DRILLSCAN DIGITAL SOLUTIONS Enhance drilling engineer performance with precise digital solutions. ADVANCED WELL ENGINEERING Premium engineering ...
Read more

MAGVAR™ OMNI TECHNOLOGY

Image
  Achieve Unmatched Accuracy MagVAR™ Omni technology elevates standard surveying practices by delivering more precise wellbore trajectory and shape. By integrating our survey correction services with continuous inclination measurements, it helps ensure exceptional accuracy in both lateral and vertical positioning. This enhanced mapping provides valuable insights into the trajectory and configuration of your well to help you reach your intended geological target with confidence. A comprehensive understanding of the wellbore trajectory and shape can: ·        Facilitate strong agreement between geologic & drilling teams ·        Minimize positional errors ·        Identify tortuosity ·        Improve wellbore quality ·        Improve Geology-Drilling data ·        Reduce costly re-drills ·  ...
Read more

DRILLSCAN® SOFTWARE IDENTIFIES DRILLING DYSFUNCTION CAUSES IN COMPLEX, MULTILATERAL ERD WELL

Image
An operator in the North Sea faced a lower completion lock-up 800m above total depth (TD), followed by a stuck pipe event in an ERD multi-lateral well. In an initial effort to push the completion down to TD, all slack off weight and torque margin were used. Since no improvement was observed, the decision was made to pull-out. However, the string remained stuck and despite the rig efforts to free it, the lower completion had to be cut and left in hole. H&P’s DrillScan® technology team performed an in-depth post-analysis, reviewing all available data to identify what might have caused the lock-up event. The data provided was used to simulate the downhole conditions undergone by the completion with the DrillScan genuine stiff-string model. The results and conclusions pointed to string dysfunctions: suboptimal tripping and lubricating/ backreaming practices (BHA POOH) led to repeatedly exceeding the screens yield strength (lower completion RIH). H&P’s DrillScan software was a...
Read more