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Journal of Industrial and Environmental Chemistry | Volume 2

December 06 -07, 2018 | Dubai, UAE

Pet roleum Engineer ing, Oil and Gas

International Conference on

Joint Event

Comparison of stimulation techniques and production methods used in unconventional reservoirs in

Cherokee Basin, Kansas And Oklahoma, USA

Steven A Tedesco

Energid Energy, USA

oalbed methane and carbonaceous mudstone reservoirs

require unique drilling and completion methods to

minimize reservoir damage and achieve optimal production.

Determining successful drilling and completion techniques

for unconventional reservoirs tends to be a long-term process

that is based on more trial and error. Which particular drilling

or completion method will be optimal may not be known for

years after production has begun from an area. Despite the

success or failure of a particular completion method(s) used,

there are geologic and reservoir characteristics that may be

unknown initially that can have an adverse or positive effect on

production. In 2008 over 7,000 wells were producing from coals

and carbonaceous mudstones for the Cherokee Basin (Figure

1). In 2008 more than 1,000 wells were awaiting completion

or connection to a gathering system. In that same year, drilling

and completions began to slow due to the collapse in gas

prices. By 2009, coal bed methane drilling activity completely

ceased in the Cherokee Basin. The reservoirs are characterized

by low volumes of produced water and production decline

curves similar to conventional gas reservoirs. Drilling for new

coalbed methane and shale gas reservoirs post-2010 is almost

non-existent. The types of completion methods used can be

categorized in to single zone or up to 7 zone completions. The

number of fracture stimulations can be further characterized

by single zone fracture stimulation to multiple zone fracture

stimulation. Specific coals and carbonaceous shales were

consistently gas productive whereas other zones were not.

The data is impacted by drilling methods used, location of

the reservoirs in the basin, water data, completion methods,

and understanding rock properties and compare to actual

production. This paper will present integration of production

and completion data with general geologic data determines:

1) the optimal completion technique (s); 2) specific coals and

carbonaceous shalesaremoreproductive; 3) themediandecline

production profile; 4) optimal areas in which to find production;

and5) howcanproduction rates and total volumes be improved.

Steve@energidenergy.com

Oil & Gas 2018 &

Petroleum Engineering 2018, Volume 2

DOI: 10.4066/2591-7331-C2-006