Trending Content

Content Tagged: "wellbore"

Filter Results

Specialized Open and Cased Hole Logging Tools and Well Logs Featured Image

Specialized Open and Cased Hole Logging Tools and Well Logs

Reviews a number of specialized open and cased hole logging tools with their associated well logs. The topic covers nuclear magnetic resonance (NMR); dielectric, sidewall coring, formation testing and sampling, caliper, borehole gravimeter and borehole televiewer tools run in open wellbores, with examples of their well logs. Cased hole pulsed neutron logging tools are reviewed, together with well logs recorded in both pulsed neutron capture and carbon/oxygen logging modes.

Wellbore Seismic Featured Image

Wellbore Seismic

Evaluate the applicability of wellbore seismic technology to a particular well. Determine the need for check shot survey, synthetic seismogram, vertical seismic profiling (VSP) and cross-well tomography. Use seismic sections, petrophysics and geological information to determine the wellbore seismic program. Identify the applicability of a wellbore seismic program for the exploration objective and acquisition configurations for different wellbore seismic techniques. Describe the acquisition and QC of the check shot survey / VSP. Describe the generation and QC of a synthetic seismogram from well logs and check shot data.

Seismic Interpretation of Shales Featured Image

Seismic Interpretation of Shales

This topic outlines the seven common types of unconventionals. It identifies the twelve desired characteristics of productive shale gas formations and outlines the impact of unconventional drilling on shale gas resources. The process of hydraulic fracture stimulation is described. The potential for seismic to help in the search for shale reservoirs is explained. Important mechanical rock properties for reservoir engineers that help with reservoir characterization are listed. The three seismic attributes that are useful for identifying optimal drilling locations are identified, and how these attributes are derived from the direct seismic is explained. It defines the three common current inversion methods. Two important factors that affect unconventional rock velocity are described. It outlines two important factors of velocities and explains how this determines the placement of wellbores. The coherence attribute and the features it helps to identify are explained. The main objectives of a microseismic survey are discussed. It lists the reasons it is important to identify faults early in the hydrofracking operation. Four key reasons microseismic is used to monitor well stimulation activities are explained.

Overview of Formation Evaluation Featured Image

Overview of Formation Evaluation

Introduces the scope, objectives and main methods of formation evaluation, especially LWD and wireline well logging, core acquisition and analysis, and well testing. Discusses the measurements of rock and fluid properties such as porosity, absolute and relative permeability, formation resistivity, fluid saturation, petrophysical parameters and the effects of drilling mud filtrate invasion on the formations near the wellbore. Describes the main core acquisition processes and subsequent common routine and special core analysis (SCAL) techniques. Overviews the objectives and some basic methods of well testing and analysis, and the integration of the well test analysis with other subsurface data.

Production Technology Featured Image

Production Technology

Describes the production technology techniques used to maximize production. Once production begins, the reservoir is only a part of a larger system, and understanding the relationships among all elements--the wellbore, tubing string, artificial lift equipment, surface control devices, separators, treaters, tanks and measuring devices--is crucial to economical and safe recovery. Duration: 1 hour, 40 minutes Content: Well Completions Surface Production Facilities Production System Performance Artificial Lift Production Technology: References and Additional Information

Drillstem Testing Featured Image

Drillstem Testing

Introduces equipment and procedures for drillstem testing. Describes basic tool assemblies and operating procedures for fixed and floating rig testing. Illustrates qualitative and quantitative analysis of drillstem test data.

Underbalanced Drilling Featured Image

Underbalanced Drilling

This presentation covers the underbalanced drilling method, which is defined as the practice of drilling a well with the wellbore fluid gradient less than the natural formation gradient. Besides minimizing lost circulation and increasing the penetration rate, this technique has a widely recognized benefit of minimizing the damage caused by invasion of drilling fluid into the formation. Different underbalanced drilling equipment and techniques are discussed under this topic. The underbalanced well classification system used by the industry and several case studies are also covered in this presentation. Duration: 4 hours, 20 minutes Content: Introduction to Underbalanced Drilling Dry Air Drilling Nitrogen Drilling Natural Gas Drilling Mist Drilling Foam Drilling Stiff Foam Drilling Gasified Liquids Flow-Drilling Snub Drilling Underbalanced Drilling: General Issues Case Studies Underbalanced Drilling: References and Additional Information

Rock Mechanics Fundamentals Featured Image

Rock Mechanics Fundamentals

Upon completing this Learning Module assignment, the participant should be able to apply rock mechanics fundamentals to describe well, reservoir and production behavior and define the following rock mechanical properties under various conditions of confining pressure, describe how these properties influence wellbore stability, directional drilling considerations, well completion design and other aspects of reservoir development, and know how they are measured in the laboratory: Brinell hardness, tensile strength, normal/shear stress relationships and failure mechanisms (Mohr circles), Young's modulus, Poisson's ratio, compressive strength, and shear strength.

Basic Seismic Interpretation Featured Image

Basic Seismic Interpretation

Introduces seismic data interpretation. Lists the four basic steps in structural seismic interpretation. Identifies where to pick the horizon on the seismic waveform and why. Explains why migration changes the reflection times on dip lines, but does not change them on strike lines. Recognizes the location of favorable traps for hydrocarbon accumulations. Explains the timing and the depositional mechanics of faulting and how this impacts oil and gas migration. States the different types of seismic effects that can be misleading during interpretation. Explains the concept of sequences; intervals within which the sediments are genetically related. Describes how the amplitude, polarity, and shape of the seismic signal are important to understanding the geological lateral variations of the subsurface. Differentiates between bright spots, flat spots and dim spots on seismic sections, and explains what causes these direct hydrocarbon indicators. Outlines how crosswell seismology provides high density, depth-calibrated seismic data between two wellbores. Describes how and where seismic attributes are applied. Duration: 5 hours Content: Introduction to Seismic Interpretation Structural Interpretation Seismic Stratigraphy Seismic Interpretation Methods Interpretation with Seismic Attributes