Replies to This Discussion

Permalink Reply by Big Little Oil on October 18, 2012 at 4:17

So the Dean 31 had a shut in casing pressure of 4500 psi? Is that indicative of the build up test?

Permalink Reply by Matthew Kable on October 18, 2012 at 4:22

So, to the uninformed, is 4,500 SICP a high or low number?  Can we generalize anything with respect to the future productivity of the well off that number?  Thanks.

Permalink Reply by whodat on October 18, 2012 at 6:50

Pressure is just Force per unit Area (P=F/A).  In terms of generalizing productivity, no one can give a good guess unless someone has a production trend from a nearby well.  There are wells where the pressure can reach up to 12,000 psia, and it only produces dry gas.  Some wells only has up to 3,000 psi and it can produce up to 5,000 bbls of oil/day.

Some consideration to take into:
Permeability
Porosity
Formation connectivity
Fluid specific gravity

just to have a reasonable guess on the well future productivity.

Permalink Reply by Big Little Oil on October 18, 2012 at 6:55

Whodat, just to be clear, you posted that as it is what you have heard is the Dean 31 well's SICP?

 

Permalink Reply by whodat on October 18, 2012 at 7:02

BLO

 yes, I heard that from boots on the pad.

Permalink Reply by obed w odom on October 18, 2012 at 7:29

My uninformed opinion is that a shut-in pressure of 4500 psi is good, but the flowing pressure will likely be more relevant, as a high flowing pressure would indicate good characteristics for the 4 factors whodat mentions.

Permalink Reply by Rock Man on October 18, 2012 at 8:57

A point that needs to be considered with any SI pressure build up reading is what fluid (if any) is in the wellbore. Has a definite impact on pressure reading.

As indicated in other comments, having a nice SI pressure is good, but says nothing about the reservoir and deliverability.

It would be interesting to see if the SI pressure is increasing over time, i.e. 4500# one day and then 4800# a week later. This would be an indicator of the reservoir still "talking" to the wellbore as the SICP continues to reflect the actual reservoir pressure. In tite formations like the subject of tihs forum, it may take weeks for the SICP to reach its maximum reading.

 

Permalink Reply by tony allen on October 18, 2012 at 9:40

Thanks guys! Very informative.

Permalink Reply by John D Cook on October 18, 2012 at 10:51

Allowables of 800 for the Dean well was posted on sonris, would this be for oil or gas?

Permalink Reply by North LA on October 19, 2012 at 2:48

I think the time frame is what's important. 88bopd is what it comes out to and that seems about right for previous vertical LSBD wells in the area.

Permalink Reply by Barbara Keene on October 20, 2012 at 5:03

Hey John, I would guess oil because I assume there is no pipeline and they have flared gas.

Permalink Reply by John D Cook on October 29, 2012 at 15:09

Well allowables 2000 was posted on sonris today for Dean well.  Skip could you provide any info on this please?

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