20

It's not too too likely, but it can happen. A few earthquakes have either been attributed to fracking, or the wastewater produced from fracking. According to the USGS (for more information, visit that page): Many questions have been raised about whether hydraulic fracturing — commonly known as “fracking”— is responsible for the recent increase of ...


16

Caesium-137 is not used in the fracking process. Caesium-137 is used as a source of gamma-rays in some logging tools, most notably the density tool (one example), and some other instruments such as flowmeters. This is what the story you linked to is about. Logging tools are used after drilling to measure the properties of the rocks in the borehole, and ...


7

Your question uses the word "likely", so to that I would say no, it's not likely, but it can happen, depending on the tectonic setting and the state of the stress field. In 2007 work on the "hot rock" geothermal project in Basel, Switzerland was stopped because hydraulic stimulation caused a series of small seismic events that were over a predetermined safe ...


4

Viability of an oil or gas well for geothermal energy production is dependent upon several factors: - Geothermal heat profile with depth near the well - Depth of the exhausted well - Volume of fluid acting as a heat exchange around and near the well. I think it might be possible to use exhausted natural-gas wells will be suitable for re-use as a ...


2

According to Howarth, et al. 2011, from 4 wells they sampled, flow back after hydraulic fracturing lead to a release of methane equal to 0.6-3.2% of lifetime production of the well. Fracking wells released methane equal to 3.6-7.9% of lifetime production from all sources, while non-fracking wells released 1.7-6.2% of lifetime production. Petron, et al. 2014 ...


2

Rotting vegetation generates methane, or marsh gas as it is sometimes called. The most obvious method by which clathrates were formed in Arctic regions is that many years ago during summer and autumn, rotting vegetation produced methane, which combined with water at cold temperatures to produce methane ice, otherwise known as clathrates. Extremely cold ...


1

Don't bother trying to isolate production by stage unless you have a production survey. Even then it is often irrelevant as the chance of restimulating the specific rock that is lower producing is small.


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