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/* Summary of Hydrocarbon recovery by using biogenic materials combined with Pneumatic fracturing */
===Summary of Hydrocarbon recovery by using biogenic materials combined with Pneumatic fracturing===
....[Contd]
==Chemical reaction induced pressure pulses fracturing==
{|border="2" cellspacing="0" cellpadding="4" width="80%"
|align = "center" bgcolor = "#9BBB59" colspan = "4"|'''Chemical reaction induced pressure pulses fracturing'''
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|align = "center" bgcolor = "#9BBB59"|'''S.No'''
|align = "center" bgcolor = "#9BBB59"|'''Assignee'''
|align = "center" bgcolor = "#9BBB59"|'''Patent'''
|align = "center" bgcolor = "#9BBB59"|'''Comment'''
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|align = "center" bgcolor = "#9BBB59"|1
|align = "center"|'''Univ Louisiana State'''
|align = "center"|<font color="#0000FF"><u>[http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5083615.PN.&OS=PN/5083615&RS=PN/5083615 US5083615A]</u></font>
|align = "center"|The pressure pulses are generated by the reaction of aluminum alkyl with either water, or alcohol, or acid.
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These sections now concentrate on the work done by the companies or institutes.
===Univ Louisiana State===
[http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5083615.PN.&OS=PN/5083615&RS=PN/5083615 US5083615A] titled "Aluminum alkyls used to create multiple fractures" by Univ Louisiana State. The pressure rise after fracturing is the important parameter in determining the fracture pattern. The time required for the pressure rise is found to be longest in hydraulic fracturing. So to control the fracture pattern the pressure rise time has to be controlled. A chemical reaction which produces heat and gas will increase the pressure of the system. This pressure is used to fracture the rocks and stimulate water, oil or gas wells in tight rock formations. The '''pressure pulses''' are generated by the reaction of aluminum alkyl with either water, or alcohol, or acid, or a combination of water and alcohol, or a combination of water and acid. The pressure rise time indicates that the reaction is most likely in the multiple/single fracture regime.
Univ Louisiana State in 1992 stimulated water, oil or gas production by pressure pulses which are generated by the chemical reaction which produces heat and gas using Aluminum alkyls.
