Joint reports


Stratigraphic Model of Deposits in South Caspian Basin

  • The executive companies: GIA / Mobil
  • The year of publication: 1994
  • Code: -
  • Volumes: total 1
    volumes with appendixes in same amount: 1



EXECUTIVE SUMMARY


It was studied a total of eight (80) thin sections from the South Caspian Basin of Azerbaijan and Turkmenistan to Reservoirs, Inc. for petrographic analysis. These thin section examples had been impregnated with blue-dyed epoxy to highlight porosity and stained with sodium cobaltinitrate to distinguish potassium feldspar grains. Point count modal analysis (250 points) was conducted on seventy-eight of the seventy-nine thin sections to provide semiquantitative estimates of framework grain components, pore-filling constituents, and types of visible pore space. The other sample consisted predominantly of drilling mud solids so no point counting was conducted. Point count results accompany each of the thin section photomicrograph plates.


The samples are moderately to well-sorted (rarely poorly sorted), coarse siltstones to lower coarse sandstones. Compositionally, they are lithic arkoses, litharenites, feldspathic litharenites, subarkoses and sublitharenites.


Undifferentiated carbonate cement is the principal pore-filling constituent along with locally abundant anhydrite. Undifferentiated (authigenic clays) are locally abundant.


In some samples, integranular pores are well preserved and well interconnected.

CONTENTS

  1. Tectonic features, geological structure of shelf zones of the South Caspian
  2. Petrographic analysis of clastic rocks from the South Caspian Basin
  3. Reservoirs quality in oil fields and prospective structures

3.1 Lower Kura depression
3.2 Baku Archipelago
3.3 Absheron Archipelago and Absheron-PreBalkhan sill
3.4 Absheron p-la


  1. Appendix. Litho-geological profiles and litho-stratigraphic sections