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Gold/Mining/Energy : KOB.TO - East Lost Hills & GSJB joint venture
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To: grayhairs who wrote (14601)3/5/2001 4:02:51 PM
From: John M  Read Replies (1) of 15703
 
GH,

H. Dale Beggs and James P. Brill.

The flow regime at bottom hole most closely resembles two phase liquid flow (water and supercritical HC). The Z factor is 1.68 for the HC! I believe what you would observe if you could do a cat scan on the tubing string is water flowing through the center with HC flowing in a ring around the water. My program seems to believe that water will be in the liquid state although I would have a hard time arguing against a dense phase. The HC is definately dense phase.

The tubing I.D. I am using is 2.43". I based this on the pressure rating required for this well and 3.5" O.D. tubing. As you can see, 3.5 miles of this tubing can make a big difference. At 300 Barrels/MMscf water, the available area for HC flow is reduced significantly.

Beggs and Brill doesn't go up to the pressures and temperatures we need to simulate this well. It does work well, however, on a well I am familiar with which has 5000 psig FBHP and 2000 psig FTP 40 BBls/MMscf 10.7 brine and very similiar hydrocarbon composition to ELH. Basically, it acts like liquid until you drop below the critical pressure. After that, you have a three phase flow system (water/condensate and gas) which is pretty tough to predict.

J
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