DynaRed™ Fiber Case Histories

 

Case History #1 - Offshore gulf of Mexico 
A major international oil and gas company drilled a well in Louisiana waters. The problem was the upper portion of a sand taking fluid and not permitting continued drilling for fear of creating a well control problem. The drilling mud was very dense (18.3 ppg), and this prevented the addition of large amounts of traditional types of seepage control materials such as gilsonite, ground fiber and fine mica.

An LCM pill made with combinations of two different competitive ground fibers totaling 10-14 ppb produced funnel viscosities of 150+ sec/qt and required extensive diluting and weight up in order to be pumpable. This pill was placed on bottom and pumped with the following results. The first attempt to seal the seepage zone resulted in pumping 19 bbl mud and reaching a high of 257 psi before breaking back to 200 psi. The second attempt resulted in pumping 17 bbl and reached a high of 257 psi before breaking back to 200 psi. This pill was circulated out and not left in the hole.

The pill built with DynaRed™ fiber had 15 ppb and 10 ppb of sized calcium carbonate with a resulting funnel viscosity of only 120 sec/qt. The rest of the mud properties were PV 94, YP 54 and Gels 27/44. The pill was diluted back to 100 sec/qt funnel viscosity reweighted to 18.3 ppg and pumped. After placing the pill, 4-5 bbl were pumped, the pressure built to 360 psi and then broke back to 170 psi. After pumping another 4-5 bbl, the pressure built to 406 psi and bled off slowly to 200 psi. This was good enough to come out of the hole, change bits and return to bottom. The mud on bottom after 20 hours was very pumpable and the pill was washed out with no problems. This well was drilled to total depth without further seepage loss problems. The drilling manager for this company credits DynaRed™ fiber with solving his lost circulation problem.  

 

 

Case History #2 - Central Texas gulf coast 
An independent turnkey drilling contractor drilled two wells in Jackson County, Texas using DynaRed™ fiber. DynaRed™ fiber was added at 7440 ft to prevent seepage to upper Vicksburg sands that were a known problem. Initial treatment was 1/3 ppb (12 sacks) and additional material was added at a rate of 1 sack every two hours. Mud weight was 15.5 ppg. The mud service engineer reported that DynaRed™ fiber mixed in well and did not cause the mud to thicken like other fibers did. No problems were encountered and the drilling contractor was pleased enough to reorder DynaRed™ fiber for a second well to be drilled in the same area. No problems were encountered on the second well either. 
 

 

 Case History #3 - Upper Texas gulf Coast
An independent operator drilled a chalk well in Washington County, Texas using DynaRed™ fiber. DynaRed™ fiber was added at 4000 ft just 200 ft prior to drilling sands in the upper Wilcox formation. Treatment was 1 sack per hour while drilling and this treatment rate was maintained through 8200 ft. Sands that normally took large amounts of mud while drilling were sealed off The operator felt that DynaRed™ fiber contributed to the success of the drilling operation and continued to use DynaRed™ fiber all the way to casing point. 
 

  

Case History #4 - Upper Texas Gulf Coast 
An independent operator drilled a well in the Chocolate Bayou area (Brazoria County, Texas) using a combination of fiber including DynaRed™ fiber: The well was drilled successfully. 
 

  

Case History #5 - Central Texas gulf Coast 
 An independent operator drilled a well in the Chocolate Bayou area (Brazoria County, Texas) using a combination of fiber including DynaRed™ fiber: The well was drilled successfully.
 

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