OIL AND GAS WELL SLOTTING PERFORATION TECHNOLOGY PROFESSIONAL SERVICE

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MAIN REQUIREMENTS OF GEOMECHANICS

TO INITIAL OPENING OF THE PRODUCTIVE FORMATION

  • casing must be opened fully (maximum on the entire length of the production interval along the column), but with considering the strength of the column   

  • productive formations area should be opened as much as possible, and with possible a greater depth (exclude hit pieces of cement into the opened space of productive formation) 

  • cement sheath should keep the integrity (cracks and destruction of the cement promote the flows of water from watered intervals and eventually lead to the flooding of the productive formation)  

  • exclude formation of melted and other borders between opening area and productive formation (this prevents hydrodynamic connection of the well with the productive formation)  

  • exclude connection (mixing) of productive and unproductive (watered and harmful) intervals (opening should take place only within the required production interval) 

 

Based on the foregoing about malicious stress-strain states conditions in the near wellbore zone (initial factors), can be argued one more the following requirement: 

 

  • is necessary unloading stress conditions in the near wellbore zone (in opening productive formation zone)

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What kind of technology/method of opening casing, cement, and formation you know, that would satisfy all the requirements of Geomehanics ?

 

Comparative characteristics of the main initial opening methods clearly shows, that the most effective and meets all the required parameters of Geomechanics are HMSP (hydro-mechanical slotting perforation) and HSP (hydro-slotting perforation). The second, even more efficient because it uses abrasive sand. Wells which initially developed with using such effective opening methods (HMSP and HSP) continue "work" 10 -15 and more years.

 

Comparison of different technologies/methods, read in section "comparisons".

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