Schlumberger

Performance Report: Louisiana, RHE-USE Nets Operator Estimated Savings of $176,558

Challenge: The operator was prepared to drill a well in the Desoto, LA portion of the Haynesville Shale. There, low-gravity solids (LGS) were extremely problematic and expensive, with offset wells requiring tremendous expenditures and potential environmental liabilities to haul large volumes of contaminated cuttings to distant disposal sites. In addition, the inability to remove LGS restricted drilling performance, further increasing well construction costs.

Solution: Solids control / waste management specialists from M-I SWACO, A Schlumberger Company, recommended the operator employ their new-generation RHE-USE process to completely remove LGS to enhance drilling efficiency and reduce disposal costs. The patent-pending, chemically-enhanced technology had previously field-proven its capacity to optimize drilling while delivering cuttings suitable for onsite disposal. The RHE-USE process was used in a 5,128-ft (1,563 m) interval from 11,401 to 16,529 ft TD (3,475-5,038 m).

Result: The RHE-USE process was credited with saving the operator an estimated $176,558, based on lower haul-off and disposal costs, increased volumes of reusable oil-base drilling fluid and reduced days vs. depth drilling. During drilling, total dilution was 812 bbl to maintain 1.73 LGS content, compared to the estimated 46,917 bbl that would have been required with 100% dilution. Further, by using the RHE-USE process, the operator was able to generate 885 bbl of reusable mud that otherwise would have been hauled off for offsite disposal. In addition, reduced friction lowered downhole mud temperature by 30 to 50°, thus lowering performance-restricting abrasion to the downhole motor and bit.


Download: Louisiana: RHE-USE Nets Operator Estimated Savings of $176,558 (0.29 MB PDF)

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