An Overview of Reservoir Geoscience

Pages: 14 (2174 words) Published: February 27, 2014
Reservoir Geoscience

Dr Essam Mansour Ahmed
Associated professor
Geoscience & Petroleum Engineering Department
Universiti Teknologi PETRONAS
Bandar Seri Iskandar, 31750 Tronoh, Perak Darul Ridzuan, Malaysia D/L:605-368 7290
Email: essam.mansour@petronas.com.my

14-03-35

Learning Outcomes
Students should be able to :


Interpret the Depositional Environment of

sedimentary rocks
 Analyze petrophysical properties and
subsurface facies from log and seismic
 Interpret Reservoir Distribution and Geometry

 Describe Hydrocarbon Distribution in a reservoir through geophysical and geochemical studies

Learning Outcome-3 &4
Interpret Reservoir Distribution and Geometry
&
Describe Hydrocarbon Distribution in a Reservoir
Reservoir Continuity
(1) Geological Time
(2) Steno’s Principles

Reservoir Continuity
(1) Basin Architecture
(2) Sequence boundary

(3) Lithostratigraphy

(3) Diagenesis related to unconformity

(4) Geological Events


(4) Slope & Basin floor fans

Describe Hydrocarbon Distribution in a reservoir through
geophysical and geochemical studies: Res. Size, Shape &
modeling, Res. Geophysics.

Out come : Geologic time and stratigraphy
 Types of stratigraphic units

 Geologic time scale
 Several Geologic “ Laws”

Geologic time and stratigraphy
Definition
 Stratigraphy is a branch of geology which studies
rock layers (strata) and layering (stratification).
 It is primarily used in the study of sedimentary and
layered volcanic rocks.
 Stratigraphy includes two related subfields:
lithologic stratigraphy or lithostratigraphy, and
biologic stratigraphy or biostratigraphy.

Geologic time and stratigraphy
 Lithostratigraphy
 Definition
 Study of the sequence and interpretation of layered rock sequences, based on PHYSICAL CHARACTERISTICS (lithology)
of the rocks.
 The study and correlation of strata to elucidate Earth history on the basis of their lithology, mineral content, grain size, texture and color of rocks.

 What lithostratigraphy can do for you
 Place unit in geologic framework
 Establish stratigraphic relationship with units above and below
 Aid in correlation between other LITHOLOGIC units

Geologic time and stratigraphy
Why are geologists interested in studying stratigraphy?
The study of rock strata, with emphasis on their succession, age, correlation, form, distribution, lithology, fossil content, and all other characteristics useful in interpreting their environment of origin and geologic history.

Geologic time and stratigraphy
The most important types of stratigraphic units are:
A. Lithostratigraphic units:
These
are
based
on
observable
of
their lithology, mineral content, grain size, texture
and color of rocks, and possibly also including
certain basic sedimentological information such as
types of sedimentary structures and cyclic sequences

Composition of rock layers
Conglomerate
Breccia

Sandstone

Shale

Sedimentary Texture: Classification
Sedimentary Texture:
 Grain Size
 Grain Sorting
 Grain Shape
 Grain Roundness
 Crystalline
(Coarse,Fine)

Hierarchy of Lithostratigraphic units:Super group:- Is a formal assemblage of related or superposed groups or of groups and formations

Group:- Consists of assemblages, but groups not need to be entirely of named formations

Formation:- Is a body of rock , identified by lithic characteristics and stratigraphic position, that is prevailing but not necessarily tabular, and is mappable at the earth surface and traceable in subsurface . Most be of sufficient areal extent to be formation mappable at the scale of mapping commonly used in the region where it occurs. The fundamental lithostratigraphic unit formations are grouped to form higher rank lithostratigraphic units and divided to lower rank units.

Member:- Is the formal stratigraphic unit next in rank below of a formation and always part of some formation. A formation need...
Continue Reading

Please join StudyMode to read the full document

You May Also Find These Documents Helpful

  • Geoscience Essay
  • Vietnam Overview Essay
  • Reservoir Dogs Essay
  • Reservoir Dogs Essay
  • Reservoir Dogs Essay
  • Overview Essay
  • Reservoir Dogs Essay
  • EsHyDro reservoir Essay

Become a StudyMode Member

Sign Up - It's Free