Abstract: Distribution and Characteristics of Oil and Gas Source Rocks of the Indus Basin, Pakistan
CURIALE, JOSEPH, WASIM AHMAD, STEVEN SPERRY, and THOMAS SHAW
Compositional and correlational characteristics of oils, condensates, gases and possible/potential source rocks of the Indus Basin (Pakistan) have been examined using elemental, isotopic and molecular techniques of petroleum geochemistry, as part of a multi-year effort to define the source and migration characteristics of hydrocarbons in this region. Our objectives in this paper are (a) to present the preliminary results of this effort, and (b) to recommend specific continued technological approaches to exploration and development in the Indus Basin.
Both hydrocarbon and non-hydrocarbon gases occur widely, and at least three distinct families of hydrocarbon gases are present. Analyses of produced, tested and seeped liquid hydrocarbons imply the existence of at least five source organic facies for these liquids.
Several oil and gas source rock intervals occur, ranging from the organic-rich oil source rocks of the Infracambrian to the oil shales of the Kirthar Formation. However, not all of these are effective sources. Structural complexity and a wide intraformational range of thermal maturity have made petroleum-source rock correlations difficult, although isotopic and molecular approaches have achieved some success. Our results will be presented using a series of geochemical parameter maps, designed to present the sourcing aspects of the various petroleum systems considered to be operating in the Indus Basin.
AAPG Search and Discovery Article #90942©1997 AAPG International Conference and Exhibition, Vienna, Austria