MMM106

Educational Website

Home

join us

News

Vlogs

MMM team

second web

Well Stimulation: Production Improvement by Fracturing

lecture 25

    Here’s a summary of acid stimulation in oil wells based on various sources:
  1. Well Stimulation and Hydraulic Fracturing: The process of well stimulation involves hydraulic fracturing, which is performed by injecting fluid at high pressure into a well to create fractures in the reservoir rock. This increases the flow of hydrocarbons to the wellbore, improving productivity.
  2. Fracture Geometry and Productivity: Hydraulic fracturing can increase the productivity index by enhancing the wellbore area. The fracture geometry (width, height) is crucial, as it essentially expands the "effective" wellbore area, increasing productivity.
  3. Flow Regimes and Pressure Drop: Fracturing alters the flow regime in the well. Initially, a well has a radial flow, but after fracturing, the flow regime becomes a combination of linear, bi-linear, and semi-radial flow, reducing pressure drops and improving productivity.
  4. Fracture Conductivity Index: The effectiveness of the fracture is evaluated using the fracture conductivity index (dimensionless), which is calculated based on fracture permeability and reservoir characteristics. A higher index leads to better well performance.
  5. Skin Factor and Productivity Improvement: The skin factor, which is influenced by the fracturing process, affects the well's productivity. A lower skin factor results in better productivity, and its calculation includes factors like fracture permeability and wellbore diameter.

transcript

"(00:00) Hai ended Ford matriks daising carbonate day shingen astonishing lesley we have hidrolik factory in featuring Somebody's actually hydraulic fracturing hydraulic fracturing Is Again well stimulation treatment performed by bisnis the keyword injecting fruit about the fraktur pressure wipfrag the well we free software to create Hayley konduktif pas from the reservoir to the wellbore to increase the well productivity Oke so gain we meet with the productivity indeks ya the productivity dacxi so by Breaking The reservoir by fracturing (00:48) dirasa for wind proof the productivity and this is the geometry of the Fracture we have exceptional Flying off Acer we have with the width of the Fracture nxf02h It Off The Fracture Oke n How actually the Fracture improve the productivity of the Fracture can improve can increase productivity trust someone is the first waist by bigbike enhancing the wellbore area So if you have ideal well original well like this one the flower ya smule can be calculated Using the one the periphery multiplied by thickness Oke area flow dari sumur itu adalah (01:44) keliling lingkaran ini dikali ketebalan betv uh Fracture If you have this fraktur sound by this right triangles and you convert the DR Ya to be the sirkel Hai dan you have equivalent wellbore this oke you know the exception of the wellbore of the Fracture and you convert to equivalent wellbore address Which two perfect multiplied by xxf So if you know the xf8 of your free quote now you can Calculate the equivalent wellbore this So it's like the wellbore area will be bigger because of the Fracture but it's (02:37) not really It's just analogi jadi ketika kita punya Fracture itu seolah-olah ya ini seolah-olah wellbore yaitu well radiusnya itu membesar dari awalnya er double you know it becomes er double action Which is significantly bigger than art double So if you have bigger radius you will have bigger or higher productivity index that simple If you have bigger well than Your flowered will be bigger also suggests the first ride with the touring can increase productivity next Endless cycle Which is by changing the flow regime in original (03:24) We only have Radial flow regime and the pressure drop in real floragyn can be quiet high But Now do to the Fracture we have a combination of linear flow regime and by linear floragyn linear here right we have linear flow and we have by linear work flow diswandi slides linear horizontal and vertical Ison also linear should have linear flow and by linear flow and later on Hai we have semi radial flow and d'florrie games can give us slow smaller pressure drop compare to Radial flow regime in original well Oke so the (04:17) Fracture can increase productivity index by enhancing making the wellbore does the God and changing the floragyn Enno so we know we can have this new parameter call tekstur conductivity index of Fracture conductivity or dimensionless fraktur conductivity Which can be calculated using this formula so fraktur permeability multiplied by racer Which divided by reservoir permeability multiplied by fraktur half length and from cfd from dimensionless conductivity the weekend calculated the skin Factor because of the Fracture (05:06) soir we have upload in horizontal Axis on horizontal Axis we have cfd or fcd desain Anywhere we have skin plus logaritmik natural of xfd faded biar double you 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 or skin Factor duto Fracture in weekend Coldplay for example The One"