Abstract
Oil (bituminous) shales source rocks with variable amounts of solid kerogen type II are the conditions for changing the oil that is not provided for them. Each of these shales affected in temperature about 150 to 170 gallons of oil produced. Therefore by reducing hydrocarbon resources, it can be a good energy source for the future. To study the geochemistry of this shale, one section of outcrops in the Kuh-e Kaino (Northern Khozestan) was selected which was located in the central Zagros. Chemical analysis and thin sections were prepared from samples of carbonate shale. These deposits with a thickness of 115 m of the Lower Jurassic formations Neyriz and Sargelo relative age and their relationship are gradual and interfinger. The upper border after an erosional unconformity, Fahliyan Formation of Lower Cretaceous age on them covered. Analysis results show that the percentage of organic matter this shales in Kuh-e Kainois is equivalent to 8.44 percent. The index has gained economic value of metal elements Sr, V, Ba, Ni, and also has economic value. Bituminous materials formed stabilize in shaley source rock of Sargelo formation, but not with continuous deposition on them, as a result of temperature and pressure not increasing and immature kerogen. The causes of this event are as follows: the basin tectonic condition, Stratigraphy position and faults activity in the basin.
Highlights
Oil shales source rocks with variable amounts of solid kerogen type II are the conditions for changing the oil that is not provided for them
Lithology of formation are above as follows oil shale facies classes (Figure 2) Is Sergalu formation Jurassic sediments including Neyriz and Sargelo formations covering the dolomitic Khaneh-kat formation and so upper this deposits coat them with unconformity by high limestone cliffs maker, Fahliyan formation with Lower Cretaceous cover (Figure 3)
1) Oil shales deposits in the Kuh-e Kaino section are related to Sargelo formation and Lower Jurassic age
Summary
Shales sedimentary contains rocks of black shales with organic material and decomposed into oil or natural gas by thermal, making it the most important source for oil and gas deposits in the world. The black shale composed of fine particles of organic material which accumulated between clay particles [1]. Oil and gas due to the low density and internal pressure of the source rock (shale) migrate upward to the massive sedimentary. Oil shales contain considerable quantities of organic material miss conditions of oil and gas and in the early stages remained kerogen of the first type and has a high proportion of H/C and low O/C and were mainly of origin Lipeddar algal [5] [6] [7]
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