Ground Water Protection

Ground Water Protection for Well Constructions

The state regulatory agency requires production and examination actions useful in keeping the freshness and cleanliness of groundwater.   It helps to avoid possible water contamination coming from the hydraulic fracturing process.   Aside from this, the GWPC or the Ground Water Protection Council says that the possibility for hydraulic fracturing to affect groundwater is extremely inaccessible.

Groundwater Protection for Wells through Casing and Cementing

Casing is basically a hollow pipe made of steel.  It works to line the interior of the wellbore (drilled hole).  Casing is significant for giving protection to the aquifers and groundwater during the drilling process.

The latest industry for gas and oil casing specifies the thickness, length, casing composition, and tensile durability.  This is followed for certain conditions and oftentimes used as standards for choosing the casing for oil and gas.

Every complete length of the casing is known as the “casing string.”  Normally, the construction of wells involves several casing strings along with the production of surface strings.  They are set up for the well and cemented under the state’s specific requirements.  There are required standards for the kinds of cements to use, based on the list of various gas and oil cements.

Cementing involves the positioning of cement cover surrounding the casing strings.  The kind of cement may be customized depending on the needs of individual cement, or depending of the regulations allowed in the state.  For instance, there are wells which penetrate formations which are not easy to cement due to absorbent nature. For such conditions, certain additives like calcium chloride and cellophane flake are added to the cement.  This procedure helps in sealing off zones, avoids washing out of the cement, and accelerates the hardening stages of cement.

Refer to CSIRO for further information

Importance of Casing and Cementing to the Wells

Groundwater protection needs casing and cementing and these two are significant elements to attain safe groundwater.

  1. Casing strings are necessary to finish the construction of well.  They give the isolation of groundwater and the clean water zone from the well’s inside portion.
  2. Casing is important in transmitting flow back fluids from the treatment of the well.  For this condition, surface casing serves as the first protection and the production casing gives the secondary protective layer for the water.
  3. Cementing of casing gives the best value to the method of protecting the groundwater.
  4. The right sealing of the annular spaces using cement produces a barrier to the hydraulic—both horizintal and vertical fluid migration.

Oil controlling programs and state natural gas play a vital role on keeping the groundwater safe and secured.  The requirements for today’s well construction need multiple layers for the installation.  Wells need to have protecting steel casing enclosed by cement.  These are the factors designed for installation to give protection to clean water aquifers as well as the other beneath-the-ground resources.