N970 Cased Hole Logging for Production Monitoring

Course Facts

Course Code:
4 days
3.2 Continuing Education Units
32 Professional Development Hours
Certificate Issued Upon Completion


Interpretation techniques using modern cased hole logging tools are presented to understand, analyze, improve and resolve a variety of reservoir and near-wellbore production situations. Coverage includes formation evaluation through casing using pulsed neutron tools; technologies for evaluation of multi-phase fluid movement; cement bond logging from the traditional CBL/VDL and pad tools to ultra sophisticated rotating head pulse-echo tools; and fiber optic temperature and acoustic logging.

Duration and Training Method

A four-day classroom course consisting of classroom lectures with examples and discussion. Participants are provided with a copy of Dr. Smolen’s book, Cased Hole and Production Log Evaluation, as well as a loose-leaf workbook featuring examples and new technology.

Participants will learn to:

  1. Formulate cased hole (CH) logging objectives.
  2. Select CH logging tools/techniques to best evaluate zonal saturations.
  3. Evaluate formation fluid saturations and monitor fluid contact movement.
  4. Assess well production profiles and zonal fluid contributions.
  5. Assess multi-phase flow measurement results.
  6. Evaluate the information provided by CBL tools.
  7. Select appropriate bond logging tools to identify possible cement problems.
  8. Propose remedial actions for identified problems.
  9. Conduct quality control of various CH logging operations.

This practical course presents FORMATION EVALUATION through casing using pulsed neutron tools as well as basic and advanced technologies for EVALUATION OF MULTI-PHASE FLUID MOVEMENT in vertical, deviated, and horizontal production and injection wells. It also covers the full scope of CEMENT BOND LOGGING, from the traditional CBL/VDL tools and the directional and pad tools to the ultra sophisticated rotating head pulse-echo tools. “Good Bond” and “Hydraulic Isolation” are differentiated. Fiber optic temperature and acoustic logging are also introduced. The emphasis is on understanding these technologies and what they measure.

Specific topics are:

  • Overview of Vertical, Deviated, and Horizontal Logging Operations
  • Open and Cased Hole Gamma Ray (GR) Logging and CCL depth control
  • Pulsed Neutron Capture (PNC)—Tool Operation and Suitability
  • Computation of Saturations--Clean and Shaley Intervals
  • Water/Oil (WOC) and Gas/Oil (GOC) Contact Detection/Movement
  • Carbon/Oxygen (C/O) and Other Formation Evaluation Logs
  • Oxygen Activation and Radioactive Tracer Logging
  • Spinner Flowmeters in Vertical Wells for Bulk Fluid Entry Location
  • Fluid Identification Logs to Distinguish Water, Oil, and Gas Entries
  • Tools to Evaluate Deviated and Horizontal Multiphase Flow
  • Wireline and Fiber Optic Temperature/Acoustic (DTS,DAS) Logs
  • Basic CBL operation and quality control considerations
  • Quantitative bond logging, Bond Index, BI
  • The need for bond tools to scan for cement around the wellbore
  • CBL tools with pads (Baker SBT) or oriented receiver arrays
  • Pulse Echo tools (USI, CAST-V) and Isolation Scanner (IBC)

Who should attend

The course is designed for mid and senior level engineers and engineering managers, reservoir and production engineers and geologists, petrophysicists, log analysts and others involved in well surveillance, maximizing recovery, identifying production problems, or planning workover operations.

Prerequisites and linking courses

There are no pre-requisites for this course, although a familiarity with basic logging principles and practices such as offered in N914 (Log Analysis for Engineers) would be advantageous. This course links to N904 (Integrated Reservoir Engineering).

Click on a name to learn more about the instructor

Jim Smolen

Information was provided in an easily understood and practical manner.