Replies to This Discussion

Permalink Reply by Skip Peel - Mineral Consultant 4 hours ago

VSC, I'll let the experts answer this one however I'm asking about your typical well decline comment.  When you say typical well are you meaning typical current version Haynesville horizontal well?  As opposed to a U-Turn well?

• ▶ Reply

Permalink Reply by Cecil N Cannon 3 hours ago

VSC,

Attached here are two Production Charts. "Red River L 18-19" shows 6 years of production. Well location is less than 2 miles away. "RKN G 16&9" shows roughly 1 year of production. Well location is less than 4 miles away.

*Not exact math but...

RKN G initially produces about 30,000 MCF/day, Then 12 months later produces about 8,000 MCF/day. 26% of initial production.

Red River L 18-19 initially produces about 14,000 MCF/day in 2019, in 2025 it is producing about 550 MCF/day. 3.9% of initial production. 

Both wells drilled into Haynesville Shale. Guessing the reason RKN G produced so much initially is because the surrounding rock was less developed, the Red River L is 1 of 10 wells in the two producing sections. 

Really interesting, thanks for bringing this up! Keep the good discussions going! 

Attachments:

• RKN G 16-19.png, 39 KB
• Red River 18-19.png, 38 KB

• ▶ Reply

Permalink Reply by VSC DeSoto South 3 hours ago

Thank you both.

Im glad you asked, I am looking for either a well configured similarly to the one in question.  If that does not exist then any well, similar-ish?

The information on the 2 wells given is very helpful. It gives me an idea of what to expectin terms of a decline. I realize every well and location are different. 

• ▶ Reply

Permalink Reply by Ryan Howrish 2 hours ago

I will take a look at this particular well and other wells in the area and provide a decline curve the individual well and an area "type curve" (average of wells in the area) and post them here.

Generally speaking, with modern completions, there are ~4 phases of production for wells:
1) Inclining to flat initial production as the well cleans up (significant volume of frac water produced)
2) Relatively flat to low decline rate as the wells flowing surface pressure is significantly above the gathering system/line pressure.
3) High decline rate as the well's flowing pressure declines and approaches the gathering system pressure.
4) Low decline rate hyperbolic "tail" as the well's surface flowing pressure is constant with the gathering system pressure. This is as close to a steady state system as the well's production will ever be.

All of these phases can be influenced by operational decisions and you will see different operators with different operating philosophies.

• ▶ Reply