Rate-Time Decline Curve Analysis: A Step By Step Approach

In this video I demonstrate how to do decline curve analysis using rate-time decline. We will determined reserves and EUR of a gas well using production data. Although this method does not predict reserves accurately (for reasons mentioned in the video), it is a building block to understand the more complicated interpretations because it uses Arps' equations. The Arps' equations will be coded in Excel VBA for future use. Get the code at topdogengineer.com/decline-cu...
2:15 Arps' Equations and Forecasting
6:08 Step by Step approach for forecasting
6:27 Cons of using Rate-time decline
7:50 Rate-time Decline Analysis in Excel

[@jalalaguliyeva7354]

Thanks for excellent explanation. Hope you will download more videos.

[@olasaeed9002]

Thank you. This is really helpful.

[@tm062_jihansyakinaharifin9]

Hi Brandon, it looks like the template link is broken, could you share the new one? thank you. Looking forward for your answer. The video was great, anyway!

[@africaplus351]

Hi Brandon, really appreciate your time... Please could you drop more videos like this one also on material balance, and history matching...Or some useful links maybe helpful. Thanks

[@sayantanghosh6714]

Thank you very much. Wonderful explanations!

[@dot2023.]

Great!

[@mikeandronov3232]

What a great tutorial. I wasn't able to access the code. Have you removed this from your site. Thanks for the video.

[@kapilan_t]

Hi @TopDogEngineer, thank you for a great video! It seems like the link to the VBA template is broken. Would you mind sharing it again?

[@atulabhishek9817]

How do we find value of hyperbolic constant

[@marioustxexcel6375]

Nice work. What is your favorite DCA software?

[@Adennow]

If it possible to have your excel sheet it would be a great. Many thanks

[@mukiyuriafricano5821]

Great videos. Do you have the full excel template explanation? Want to create a template for my team. Thanks

[@sitoematacatedavid8327]

Please how do we determine the qi (the gas initial production rate) knowing the pressure only?

[@user-gs2se8tt6l]

Thanks a lot! Does it work for oil?

[@laurenpattee2888]

Hi Brandon! Are you able to share your spreadsheet for this?

[@atulabhishek9817]

Also tell what value of qi should be taken

[@iqbalridaltaputra3482]

Sir, at 14.47 the b value changed from 0.6 to 0.433. Can you explain why this thing happened?

[@davidolanrewaju7011]

Can I get the Excel VBA code? It's no longer available on the supplied link

[@pakchu2]

Brandon, why did you use 200 MCF/day as your qi?

[@mosabhalmajdi2336]

Hi, is that possible to mix to decline curves as a one solution. for example mix between Hyperbolic and Exponential curves ?

[@ericshannon9869]

yes there are known methods to combine hyperbolic and exponential curves into one DCA, particularly for unconventional tight gas reservoirs

[@musabusman6197]

Hey Brandon, great work man, in building the sheet and also explaining, i got inspired by your excel skills. Bro, could you please share your sheet with me plz. I need to recreate my own. Thanks. BTW, i have subscrbd your page.

[@topdogengineer8440]

Thanks for tuning in Musab. You can get the code and gas production data I use in the video at topdogengineer.com/decline-curve-analysis-rate-time-forecasting/. You will learn a lot just developing the template. Hope it helps!

[@milli3394]

Thank you so much....been laid-off oil and gas sector and got little rusty...and your step by step analysis was very helpful. Thank you so much.

[@aaronola7713]

Can you please share the excel thankyou

[@weixinrush]

You mention minimizing the loss between arps and your data for the best fit line, so why not just include this loss function in your code as opposed to having to manually alter each arps parameter. It almost defeats the purpose of writing code at all.