Seismic Line Across ‘Alpha’

Slides:



Advertisements
Similar presentations
Oil water Geometric Proof of Archimedes’ principal---From Pressure on a submerged surface Consider a submerged body in an oil-water layered system (shown.
Advertisements

Rheology rheology What is rheology ? From the root work “rheo-” Current: flow Greek: rhein, to flow (river) Like rheostat – flow of current.
Insert presentation name Insert date. SLIDE TITLE HERE (Should be 28pt font) TEXT HERE (Should be 20pt) PLEASE NOTE: These are guidelines for best presentation.
Friction. Motion stops because… Definition A FORCE that opposes the motion of objects as they SLIDE past one another. Why didn’t the balloon cars roll.
Contact Us.
Oil X Water Example of Oil/Water separation
Small scale reflection seismology
Raw Seismic Data For the explosion we just considered ...
How To Add A Xerox Printer To Google Chrome
Frio River Cabins - Frio Vacation Homes - Frio Country Resort

Define prospect elements Estimating trap volumes HC Type Assessment
Porosity Logs Shale Density porosity (solid black line)
Seismic Response What causes a seismic response?
Resistivity Logs High deep resistivity means:
Step 3: Resistivity Logs
Oil or Gas??? Should there be a difference in seismic response (AVO) between an oil-filled reservoir and a gas-filled reservoir? Model response with different.
of these basic elements
COS for Alpha Alpha’s biggest risk is that the fault does not seal.
Diapirs Can Provide Good Traps
Outline Review causes of seismic response
Seismic attribute applications:
Detection vs. Resolution - Analogy
DHIs: Amplitude Anomalies
Exercise 6b: Frequency & Wavelength
Alpha Prospect Assessment Results
What Is Seismic Facies Analysis?
Seismic - Units 10s of Meters Thick
The Convolution Method
Stratigraphic Traps – Sub-Unconformity & Reef
The Kitchen Source Organic-Rich Rocks, usually shales
Migration – Correcting for Location
Summary: Lateral Resolution
the Container to the Kitchen
Do Steps From Area to Volume Volume of a Cone = 1/3 Π r2 * h
How Can We Define Stratal Units?
Let’s say our trap in cross-section view looks like this….
A Predicted Porosity Map
Posting Geometric Observation
In the exercise we will use A COS of 61%
How do we use this information?
Graphical Answers Fresnel Zone Circles Shallow Window Deep Window
The STRENGTHS of Seismic Data
A Geologic Model 1m 75 m Perm 250 mD Sand Shale 0.1 mD 50 m Slide 16
Simple Model of HC Migration
Unrisked Results Alpha Prospect – Unrisked Excedance Probability
9 Key Elements of the HC System
Typical Vertical Resolution
Risked Probabilistic Assessment Results
A Prospect A prospect is a location and depth that has been identified as a good place to drill for oil and/or gas For us to find oil or gas, certain conditions.
Deterministic Prospect Assessment
Shot Gather For Shot 1 Source Receivers R1 R2 R3 R4 R5 S1
Seismic Facies Mapping Exercise
Petroleum System Elements
Most-Likely Scenario Present Oil & Gas Oil Gas Alpha Beta Overburden
Modeling the seismic response:
With Correct Velocity, Gather is Flat
Changes in Amplitude Indicate Fluid
The Ideal Seismic Response
DHIs: Fluid Contacts Hydrocarbons are lighter than water and tend to form flat events at the gas/oil contact and the oil/water contact. Thicker Reservoir.
Components of the Upstream
Good Migration Enhances Resolution
From Raw Data to an Image
Seismic Reflections Lecture Shot Receiver Seismic Record
Reshot for Development
      Time for an Exercise Where would the reflection lie? 1 2 3
Finding upper and lower outliers Using the 1.5 x IQR Criterion
Firebase Vs. MongoDB: Choose the Best Database of 2019
Meet Us
Contact Us
Presentation transcript:

Seismic Line Across ‘Alpha’ Fluid Contact? Gas over Oil? Fluid Contact? Oil over Water? Slide 24 Here is a seismic line across the Alpha prospect There is strong evidence for one fluid contact – a boundary between one type of fluid above a different type of fluid There is much weaker evidence for a second (shallower) fluid contact If there are two contacts, then the lower contact - green – is probably the boundary between oil above and water below The upper contact - red - is probably the boundary between gas above and oil below Courtesy of ExxonMobil L14 – Prospect Analysis