Maximizes liquid-solid separation in large-volume processing.
Challenge: Employ solids control equipment capable of handling the returns volume produced while drilling the first well in an established area with transportation and cost limitations.
Solution: Use the SCREEN PULSE fluid and cuttings separator, the MONGOOSE PRO shale shaker, and a VERTI-G cuttings dryer to handle fluid and cutting returns while drilling.
Results: Reduced mud losses 40%, saved more than 66 m3 [413 bbl] of fluid, and reduced waste volume for disposal by 17%, resulting in a cost savings of USD 36,910.
An operator was drilling its first onshore well in Argentina’s Los Blancos field. The remote area presented a number of challenges, including equipment mobilization limitations, access to chemical products required for mud mixing, and high costs associated with drilling waste. The solids control equipment at the wellsite had to be capable of handling the returns volume produced while drilling the well under these operational conditions. To successfully drill and produce the well, the operator needed to reduce the water- and oil-base mud (WBM and OBM) retention on drilling cuttings, and also increase fluid recovery on the shakers.
To meet the operator’s needs, M-I SWACO recommended its SCREEN PULSE separator be deployed on all three of the primary shakers, along with a VERTI-G dryer to use for sections drilled with OBM. Increasing the recovered drilling mud and reducing waste volumes directly reduces the logistics required for transporting mud-mixing chemicals and moving waste volumes for treatment and final disposal. Increasing the capacity for fluid handling also enables the operator to better adapt to constantly changing wellsite conditions.
The operator drilled the first section of the well (26 in and 17 1/2 in [66 cm and 44.5 cm]) with water and bentonite and the intermediate section (12 1/4 in [31.1 cm]) with MEGADRIL oil-base temperature-stable invert-emulsion drilling fluid system. The production section of the well was drilled with FLOPRO NT water-base reservoir drill-in fluid. The SCREEN PULSE separator operated continuously during the drilling except when samples were collected.
To quantify the effects of the SCREEN PULSE separator in both on and off modes, a series of tests was run on samples taken from the primary shakers, the MONGOOSE PRO shale shaker (used to dry cuttings from sections drilled with WBM), and VERTI-G dryer discharges.
Additional benefits to the operator included
Meet the needs of reservoir engineers and drilling personnel while minimizing environmental impact and increasing ROP.
Achieve durable, temperature-stable invert emulsion fluid without higher gel strengths.
Combine pulsating technology with ultraefficient screens for the utmost in cuttings treatment and fluid recovery.