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Well Stimulation: Skin Improvement by Fracturing

lecture 26

    Here’s a summary of acid stimulation in oil wells based on various sources:
  1. Skin Factor Calculation: The skin factor is calculated using a logarithmic formula involving variables like fracture permeability, wellbore diameter, and fracture length. This helps evaluate the impact of fracturing on well productivity.
  2. Example Calculation: In an example, the fracture permeability is 100,000 Darcy, fracture length is 300 feet, and wellbore diameter is 4.25 inches. The calculated CFD is 6.9, and the skin factor is negative, indicating stimulation potential.
  3. Impact of Skin Factor: A positive skin factor suggests formation damage, which decreases productivity. A negative skin factor indicates that fracturing improves the flow and increases productivity.
  4. Fracturing Effect on Productivity: The negative skin factor (calculated as -5.85) indicates improved productivity index, meaning fracturing enhances well performance.
  5. Fracture Materials: Fracture materials such as "coolprop" are used in the process, contributing to stimulation and improved reservoir performance.

transcript

"(00:00) Hai and from cfd from dimensionless conductivity weekend Calculate the skin Factor because of the factor soir we have upload in horizontal Axis on horizontal Axis we have cfd or fcd desain Anywhere we have skin plus logaritmik natural of xxdiff added by Ardo beli and we know kulit default of increase the increase of productivity di fade you to the Fracture can be calculated using this formil logaritmik natural of rsr Foredi is divided by wellbore dies divided by the same plus This is very important SM Fracture orcin Factor two Fracture and (00:56) weekend calculated for example This One If the reservoir penerb his family darcy's fraktur permeability is one hundred thousand years is if the factor Which is zero point to five inches Fracture healing is three hundred feet and wellbore this is four point to five inches than you can simply calculated the cfd six points nine so thank you look at these FDR Oke and from here you can go to the left you can get Day FF plus logaritmik natural Of swipay. (01:40) id Blue of Zero point eight nine here and now I can Calculate the SF by using this so distem will go to The Raid and now I can get bsf Isma negatif five-point Advan So now the Factor digosok fracturing is negatif Swag Silly wincris the productivity with improved the performance Oke so the skin Fighter IV Edis positif It means formation damage It will decrease your flowered but if we have negatif skin Factor dan it will be stimulation it will improve increase your productivity and that's what we have her so by fracturing We can (02:31) get minus five-point eight 5 di utuh defrag sering edit It will increase productivity index and you can call kulit default of increased by looking FB formil So if you have this one who have this one and now you have minus five koma at five Death means that the productivity indeks can be multiplied several time date edit foto Kris berapa kali lipat peningkatan productivity Oke So now I can understand How the Fracture can increase productivity How the Fracture Chan Resort in stimulation Oke n tuh old the Fracture us materials (03:21) coolprop and something like this"