About This Item
- Full TextFull Text(subscription required)
- Pay-Per-View PurchasePay-Per-View
Purchase Options Explain
Share This Item
The AAPG/Datapages Combined Publications Database
Williston Basin Symposium
Abstract
SKGS-AAPG
Eighth International Williston Basin Symposium, October 19, 20, and 21,
CASE
STUDIES ON SECONDARY OIL
MIGRATION
IN THE WILLISTON BASIN1
ABSTRACT
The use of chemical tracers, determined by the analysis of reservoired oils and associated gases, to quantify petroleum migration
processes could significantly improve the constraints for basin fluid models and help identify petroleum secondary
migration
pathways. This paper reviews the geochemical controls on one potential molecular tracer class (pyrrolic nitrogen compounds),
particularly the effect of source and maturity. Three
case
studies illustrate how to utilize the changing concentrations of
these compounds in related suites of migrated petroleums to constrain regional fluid models and to define small, efficient
channels where petroleum has migrated from source rocks to traps in the Williston Basin. The first
case
deals with the Winnipegosis
petroleum system in southeastern Saskatchewan, where oils previously thought to be sourced locally are shown to have the longest
migration
distances among a suite of related oils. The second
case
concerns the recent major Ordovician discoveries also in
southeastern Saskatchewan, where two types of Ordovician oils present in a restricted area are demonstrated to have vastly
different
migration
distances, the less mature oils being generated locally and the more mature oils being sourced from farther
down-dip in the basin. The third
case
compares the geochemistry of unexpelled oils with conventionally reservoired oils from
the Bakken petroleum system where the prerequisites for the application of pyrrolic nitrogen data are illustrated.
Pay-Per-View Purchase Options
The article is available through a document delivery service. Explain these Purchase Options.
Watermarked PDF Document: $14 | |
Open PDF Document: $24 |