Documents

Analysis of products used for drilling

Categories
Published
of 6
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Related Documents
Share
Description
Analysis of products used for drilling
Transcript
   TEDX  The Endocrine Disruption Exchange P.O. Box 1407, Paonia, CO 81428 970-527-4082  www.endocrinedisruption.org tedx@tds.net Analysis of Products Used for Drilling Crosby 25-3 Well – Windsor Energy, Park County, Wyoming April 2009  INTRODUCTION The following summaries are based on the possible health effects of the products and chemicals used in drilling a natural gas well, Crosby 25-3, northwest of Clark, Park County, Wyoming. This well was directionally drilled with a total vertical depth of 8,038 feet. Natural gas, petroleum condensate, and drilling fluids were accidentally released from the ground adjacent to the well due to a breach in the surface casing at approximately 255 feet  below ground surface. Released fluids and natural gas followed near-vertical bedding planes and/or fractures until they reached the surface at two locations. The release occurred over a period of about 58 hours between August 11 and 13 th , 2006 and resulted in surface soil impacts in an area estimated to cover approximately 25,000 square feet. 1   TEDX compiled a list of 42 products containing 32 chemicals used to drill the Crosby 25-3 Well as of March 2009. Information for the analysis came from Material Safety Data Sheets (MSDS) for the products in use at the time of the blowout, through information provided in the Terracon Remedial Investigation Work Plan – Final Draft, dated July 2, 2007, and information disclosed in the Terracon Remedial Investigation Work Plan – Amended Draft, dated September 14, 2007. TEDX makes no claim that the list of products and chemicals in this analysis is complete.  PRODUCT SUMMARY Material Safety Data Sheets (MSDSs) MSDSs are designed to inform those who handle, ship, and use the products about their physical and chemical characteristics, and their direct and/or immediate health effects, in order to prevent injury while working with the products. The sheets are also designed to inform emergency response crews in case of accidents or spills. The total reported composition of a product on an MSDS can be less than 0.1% up to 100%. MSDSs are not submitted to the Occupational Safety and Health Administration (OSHA) for review. The product manufacturers determine what is revealed on their MSDSs. The health information on MSDSs most often warns of possible harm to the skin and eyes, gastrointestinal and respiratory tracts, followed by the nervous system and brain. Many MSDSs do not address the outcome of long term, intermittent or chronic exposures, or adverse health effects that may not be expressed until years after the exposure. 1   Terracon Consulting Engineers & Scientists. 2007 Sep 14. Remedial Investigation Work Plan - Final Draft: Crosby 25-3 Natural Gas Well Release, Road 1AB, Clark, Park County, Wyoming, submitted to Windsor Energy Group, LLC, Oklahoma City, Oklahoma Project No. 26067064.  2 Of the 42 products known to be used to drill the Crosby Well, TEDX has obtained MSDSs for 37 of them. Two of the MSDSs listed “no hazardous ingredients” as the composition of the product. Seven MSDSs listed at least one ingredient, but no CAS numbers 2 , and one of these MSDSs provided no percent of composition. Of the 28 MSDSs that listed at least one ingredient with a CAS number, five provided information on less than 50% of the total composition and 20 listed between 51% and 95%. Three MSDSs disclosed over 95% of the  product ingredients and all the CAS numbers. Other Sources of Information The remaining five products on the TEDX list came from the Terracon reports listed above. The Terracon reports list a single chemical in each of the products. Information on the composition ranges from 10 to 30% and 60-100%, but no product in these reports provides complete information on the specific chemical makeup for 100% of the composition. Evaluation of the information available about the 42 products Thirty products (71%) list specific chemical ingredients (Figure 1). Seven (17%) contain chemicals with only general or non-specific names and no information for two (5%) of the products was provided. The remaining 3 (7%) of the products disclose all of the ingredients.   7% 71% 17% 5% Figure 1: Percent of Chemical Disclosure for 42 Products Used to Drill the Crosby 25-3 Well in Wyoming Complete disclosureSpecific chemical ingredients No specific chemical ingredients No ingredients disclosed    7% 14% 69% 10% Figure 2: Percent of Composition Disclosed for 42 Products Used to Drill the Crosby 25-3 Well in Wyoming Less than 1%1-50%51-95%Greater than 95%  Less than 1% of the total composition is known for 3 (7%) of the 42 products used to drill the Crosby Well (Figure 2). Less than 50% of the composition is known for 6 (14%) of the products, and between 51% and 95% of the composition is known for 29 (69%) of the products. Four (10%) of the products have information about more than 95% of their full composition. Evaluation of the health effects associated with the 42 products All of the products on TEDX’s list are associated with adverse health effects, even though two of the MSDSs stated that they contained no hazardous ingredients. Twenty-one percent had one to three associated health effects, and 79% had 4-14 health effects (Figure 3). Thirty-three percent of the products contained one or more chemicals considered to be endocrine disruptors (Figure 4), chemicals that interfere with development and function. 2  CAS =Chemical Abstracts Service, provided by the American Chemical Society. This unique number is used to identify a specific substance. A single substance can have many different names, but only one CAS number. A substance may be a single chemical, an isomer of a chemical, a mixture of isomers, polymer, biological sequences, or a mixture of related chemicals.  3 21% 79% Figure 3: Number of Health Effects Associated with 42 Products Used to Drill the Crosby 25-3 Well in Wyoming 1-3 Health Effects4-14 Health Effects   33% 67% Figure 4: Percent of 42 Products Used to Drill the Crosby 25-3 Well in Wyoming Containing Endocrine Disrupting Chemicals Endocrine DisruptorsAdverse Health Effects   CHEMICAL SUMMARY Evaluation of the information available about the 32 chemicals  Products may contain more than one chemical, and a given chemical may occur in more than one product. In the 42 products identified above, there were a total of 32 chemicals. Specific chemical names and CAS numbers could not be determined for 10 (31%) of the chemicals on TEDX’s list. The names provided were too general (e.g. cellulose derivative, inert material), or they were listed as “mixtures,” or “no hazardous ingredients/substances.” It was impossible to link these 10 chemicals without CAS numbers to any health category aside from the health data reported on an MSDS. The limitations of MSDS data for possible health effects are noted above. Summary of the health effects associated with the 22 chemicals with CAS numbers Figure 5 shows the percentages of the 22 chemicals with CAS numbers associated with the general health categories used in government reports. Chemicals are often included in more than one category.   0%10%20%30%40%50%60%70%80%90%100% Respiratory Skin, eye and sensory organ Gastrointestinal and liver OtherImmuneEcologicalKidney CancerMutagenBrain and nervous systemCardiovascular and blood Endocrine disruptorsReproductive Developmental Figure 5: Profile of Health Effects of Chemicals with CAS Numbers Used to Drill the Crosby 25-3 Well in Wyoming Total Chemicals (n=22)  When all of the chemicals are combined, 100% are associated with respiratory effects. Over 90% cause skin, eye and sensory organ problems, and 77% are associated with damage to the gastrointestinal system or liver. The immune system damage can result from exposure to 55% of the chemicals and 50% can cause ecological  4 effects (harm to aquatic species, birds, amphibians or invertebrates). Fifty-nine percent of the chemicals have health effects in the ‘Other’ category. The ‘Other’ category includes such effects as changes in weight gain, or effects on teeth or bones, for example, but the most often cited effect in this category is the ability of the chemical to cause death. The health effects on the left side of the figure are those effects that are more likely to appear immediately or soon after exposure. These effects include symptoms such as burning eyes, rashes, coughs, nausea, vomiting and diarrhea. The health effects on the right side of the figure are long term and would tend to appear months or years later, such as some cancers, the results of organ damage, harm to the reproductive system, or developmental effects as the result of prenatal exposure, all of which were associated with over 10% of the chemicals in this analysis. 0%10%20%30%40%50%60%70%80%90%100% Respiratory Skin, eye and sensory organ Gastrointestinal and liver OtherImmuneEcologicalKidney CancerMutagenBrain and nervous systemCardiovascular and blood Endocrine disruptorsReproductive Developmental Figure 6: Profile of Health Effects of Soluble Chemicals with CAS Numbers Used to Drill the Crosby 25-3 Well in Wyoming Total Chemicals (n=22)Soluble Chemicals (n=12)  Twelve (54%) of the chemicals with CAS numbers are water soluble. When examined alone (Figure 6), they  produce a similar profile of health effects as all the chemicals combined, but with higher percentages in every category except Cancer, Mutagen and Endocrine disruptors. Notably, 100% of these chemicals can harm the respiratory system and the skin, eyes and sensory organs. Seven (32%) of the chemicals are volatile (Figure 7), in other words, they can become airborne. All of these chemicals can harm the respiratory system, the skin, eyes or sensory organs, and the gastrointestinal system or liver. Over 80% of the volatile chemicals harm the kidneys, the brain and nervous system, or have ‘other’ effects. Overall, the volatile chemicals produce a different profile with higher percentages than the water soluble chemicals. Because they can readily become airborne and can be inhaled as well as swallowed, and they can reach the skin, the potential for exposure to these chemicals is greater.
Search
Tags
Related Search
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks