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Progress at Botswana coalbed methane project

World Coal,


Tlou Energy remains encouraged by progress at its Lesedi coalbed methane (CBM) project in Botswana. The Tlou project area includes the Lesedi pod and the Selemo pod.

Production at Selemo was temporarily suspended, after a down-hole pump was blocked with fines. Remedial work was carried out on the vertical production well to flush out the pump, and Tlou expects production testing to recommence shortly. Despite the inconvenience, however, the company said it remains encouraged by the build-up of gas pressure over the course of a number of weeks. After remedial work has been completed, the well will be brought down through critical gas desorption pressure (CDP), which Tlou said can be achieved in an efficient and timely fashion, based on the well performance data gained over the last month.

At the Lesedi Pilot, pump lift capacity was upgraded in mid-May to enhance the dewatering process. The water pumps on Lesedi now have the capacity to pump water at a greater rate than previous configurations. Tlou is confident that the new configuration will allow the drawdown phase of the Lesedi pod to be achieved much more efficiently. All else being equal, the high water rates in Lesedi should be indicative of the capacity of the coal reservoir to flow good gas volumes once CDP is achieved.

Dewatering  at the Lesedi pilot pod began on 5 Decemnber 2013, and the Selemo pod began dewatering operation on 17 November 2013.

Tlou Energy continues to progress down-stream gas marketing initiatives as the two pilot wells at the Lesedi project are developed.

The Lesedi CBM project is the most advanced project in Tlou’s portfolio. The project’s Prospecting Licenses extend for approximately 3800 km2 (955,000 acres) in the Karoo Kalahari Basin, southeastern Botswana. Operations have been ongoing since 2007. Numerous exploration and appraisal work programmes have resulted in an independently certified 2.3 trillion ft3 of 3C, and 152 billion ft3 of 2C contingent gas resources.

Written by Sam Dodson

Read the article online at: https://www.worldcoal.com/cbm/16062014/progress_at_botswana_cbm_project_cbm50/


 

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