Please enable JavaScript for this site to function properly.
OnePetro
  • Help
  • About us
  • Contact us
Menu
  • Home
  • Journals
  • Conferences
  • Log in / Register

Log in to your subscription

and
Advanced search Show search help
  • Full text
  • Author
  • Company/Institution
  • Publisher
  • Journal
  • Conference
Boolean operators
This OR that
This AND that
This NOT that
Must include "This" and "That"
This That
Must not include "That"
This -That
"This" is optional
This +That
Exact phrase "This That"
"This That"
Grouping
(this AND that) OR (that AND other)
Specifying fields
publisher:"Publisher Name"
author:(Smith OR Jones)

A Concept Platform for Highly Efficient and Accurate Pressure, Sampling and Sidewall Coring Operations Using Wireline Conveyance

Authors
German Garcia (Schlumberger) | Hadrien Dumont (Schlumberger) | Vinay K. Mishra (Schlumberger) | Li Chen (Schlumberger) | Ron Hayden (Schlumberger) | Chris Babin (Schlumberger)
Document ID
SPWLA-2019-UU
Publisher
Society of Petrophysicists and Well-Log Analysts
Source
SPWLA 60th Annual Logging Symposium, 15-19 June, The Woodlands, Texas, USA
Publication Date
2019
Document Type
Conference Paper
Language
English
Copyright
2019. held jointly by the Society of Petrophysicists and Well Log Analysts (SPWLA) and the submitting authors
Disciplines
Keywords
Downloads
6 in the last 30 days
99 since 2007
Show more detail
Price: USD 10.00

ABSTRACT

A concept platform integrating the precise movement of a linear or azimuthal actuator, such as in instrumented wireline intervention tools (IWIT), with fast pressure measurements or rock/fluid sampling instruments is presented. This device accurately moves the measurement probe or sampling assembly either in the longitudinal or azimuthal direction in the wellbore to significantly improve operational efficiency and data quality.

Precise down-hole movement control enables the collection of pressure data or rock/fluid samples at exact depth increments hence eliminating errors induced by cable stretching, overpull, or variable cable creep. Specific lithofacies could be targeted from a borehole image log combined in the platform. Simulation with current IWIT capabilities shows significantly reduced uncertainty over common wireline protocols. The operational procedure includes correlation using standard wireline gamma ray methods, then the platform is anchored at the top of the interval of interest and the linear actuator is used for probe displacements. Inchworm movements can also be performed to extend the length of the probe displacements. Removing cable movement for probe displacements significantly reduces the biggest source of error in distributed pressure measurements. Similar approach is proposed for the coring tool with the added benefit of being able to rotate the drilling bit at different azimuths to collect rock samples.

This concept platform would reduce the time spent on pressure surveys if similar accuracy to current practices is acceptable. Because the biggest remaining source of error is gauge accuracy, simulation results show that fewer stations are needed to replicate standard wireline results. Where accuracy is important, as with pressure measurements to quantify reserves using gradient intersection to define fluid contacts or validate compositional fluid gradients, the proposed approach is shown to significantly reduce error using equal number of stations. We use data sets from previous work to show the impact of the error reduction in the position of fluid contacts.

IWITs currently used in cased hole employ active anchoring to perform intervention tasks. Applications of linear actuators in cased hole operations today include pulling and pushing movements to manipulate completion components. The controlled downhole force available for these operations goes up to 80,000 lbf while the anchoring force could be up to 150,000 lbf. In the proposed concept platform, this pulling force could be instrumental in cases with elevated risk of differential sticking. By anchoring the upper part of the platform in overlying impermeable intervals, only the pressure probe or rock/fluid sampling assembly is lowered into the permeable interval to conduct the operation without exposing the full length of the string to the pressure differential forces and hence mitigating the risk of sticking.

The proposed architecture for the concept platform combines several operational elements used today as separate entities in wireline operations. Their integration, however, generates important efficiency gains, reduces risk in pressure measurements and fluid sampling and sidewall coring operations, improves accuracy, and enables the implementation of unprecedented distributed pressure measurements and coring practices with azimuthal positioning capabilities using wireline.

File Size  1 MBNumber of Pages   11

Other Resources

Looking for more? 

Some of the OnePetro partner societies have developed subject- specific wikis that may help.


 


PetroWiki was initially created from the seven volume  Petroleum Engineering Handbook (PEH) published by the  Society of Petroleum Engineers (SPE).








The SEG Wiki is a useful collection of information for working geophysicists, educators, and students in the field of geophysics. The initial content has been derived from : Robert E. Sheriff's Encyclopedic Dictionary of Applied Geophysics, fourth edition.

  • Home
  • Journals
  • Conferences
  • Copyright © SPE All rights reserved
  • About us
  • Contact us
  • Help
  • Terms of use
  • Publishers
  • Content Coverage
  • Privacy
  Administration log in