“Hemos instalado estos sistemas en dos pozos que trabajan bajo la tecnología CHOPS (Cold Heavy Oil Production with Sand) en Lloydminster en febrero pasado y la producción comenzó a partir el 25 de febrero de 2011.
Los pozos rápidamente estabilizaron su producción de petróleo entre 4,0 m3/d a 7 m3/d, con % de arena menores al 1% y viscosidades de aceite del orden de los 20,000 cp. Ambos pozos producen petróleo a través de tubería de producción flexible de 1.75 " incorporada a la columna umbilical Flatpak HSPCP” informó Scott Kiser.
Por otro lado, el sistema de fondo recibe inyección de una base química como reductor de fricción, a través de un tubo capilar de 0.25" que se encuentra en el mismo cordón umbilical, que ayuda a reducir las presiones de descarga debido a la alta viscosidad. Como alternativa, el operador puede separar el agua producida en superficie y reinyectar para reducir las pérdidas de presión por fricción. También se ha instalado un cable conductor único y sensores digitales dentro del pozo que permite controlar la presión dentro del pozo y la temperatura en la entrada de la bomba y descarga, permitiendo la optimización del sistema.
News Update . April 18. by Scott Kiser
Today Scott Kiser provided an update on production from its recently installed hydraulically driven progressive cavity pump system. With our driver and an industry standard progressive cavity pump landed on FlatPak in the heels of two cold heavy oil wells in Lloydminster, we are hydraulically lifting heavy oil to surface with plenty of system horsepower to spare" reports Kiser.
We installed these systems in two Lloydminster CHOPS wells this past February and commenced production from both wells on February 25th, 2011. The wells quickly stabilized with oil production from the first well optimized at around 4.0 M3/d and the second well approximating 7 M3/d. These wells produce less than 1% sand and the oil samples would suggest about 20,000 centipoise. Both wells produce fairly clean oil up the 1.75" CT production tube incorporated in the HSPCP umbilical. We are injecting a water based VR 1100 chemical from Champion Technologies through the 0.25" capillary line included in the umbilical which helps to reduce discharge pressures with this viscous oil. Alternatively the operator could tie in the on-site production tank and use the produced water to inject which would also reduce discharge pressures or they may choose to batch chemical down the casing annulus. We have also incorporated a single conductor wire and digital down-hole sensors into the system enabling us to monitor down-hole pressure and temperature at the pump intake and discharge. This permits the operator to optimize fluid drawdown from the well without pumping the well off.
These wells contain 9 5/8" casings with 7.0” liners easily accommodating our 4.0" driver with the 1.75" CT production tube along side the driver. Dual 1.0’ CT's have been incorporated in the FlatPak which are used to complete the hydraulic circuit. Any conventional hydraulic drive unit currently powering a typical rotary drive head can be used to provide fluid to power our down-hole hydraulic driver. We have completed extensive testing of our system on our test bench offering us data used in concert with the surface flow meter and pressure gauges to calculate torque. We estimate that the two systems currently deployed require under 200 foot pounds of torque with the driver capable of delivering about 700 foot lbs on a continuous basis.
“In summary”, says Kiser, “We are hydraulically lifting a typical Lloydminster volume of very heavy oil up a 1.5” ID tubular from 85 degrees in the heel of horizontal wells!” We are monitoring pressure and temperature with the digital sensors and surface recorders so that we can optimize production without pump off. The in-system capillary tube enables the operator to inject friction reducers, de-waxing, descaling or sand suspension chemicals as he sees fit" explains Kiser. “With almost two months of production time on the system we on onto something extremely beneficial to industry, particularly when trying to pump oil and/or water from the heel of horizontal wells or fluid from slant wells!” concludes Kiser.
Kiser continued “We are now designing the second generation of our HSPCP system that will get us into smaller casing environments. In addition we have designed a thru-tubing solution should the operator find this beneficial. “
CJS Coiled Tubing Supply is a privately owned company with offices in Lloydminster and Calgary Alberta.
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