최근 미국 지질조사(USGS) 연구에 따르면 비관습적인 오일 및 가스 개발과 관련해 수질에 대한 잠재적인 위험을 잘 이해하기 위해 더 많은 데이터와 연구가 필요한 상황이다.

USGS의 과학자이자 보고서의 지도 저자인 Zack Bowen은 “우리는 1970년부터 2010년까지의 국가 수질 데이터베이스를 조사했고, 비관습적인 오일 및 가스 자원을 가진 분수령 중 16%만의 장기적 트렌드를 파악할 수 있었다”고 말했다.

According to a recent U.S. Geological Survey (USGS) study, more data and research are necessary to best undertand the potential risks to water quality associated with unconventional oil and gas development in the United States
 .
"We mined the national water-quality databases from 1970 to 2010 and were able to assess long-term trends in only 16 percent of the watersheds with unconventional oil and gas resources," said Zack Bowen, USGS scientist and principal author of the report. "There are not enough data available to be able to assess potential effects of oil and gas development over large geographic areas."

 

There is not a national water-quality monitoring program in place that focuses on oil and gas development, so existing national water-quality databases and data on hydraulic fracturing were used to assess water-quality trends in oil and gas areas.

 

The study found no widespread and consistent trends in water quality, such as chloride and specific conductance, in areas where unconventional oil and gas wells are prevalent. The amount of water-quality samples, where they are located and the varying constituents that are measured are limiting factors in existing national databases.

 

Hydraulic fracturing is presently the primary stimulation technique for oil and gas production in low-permeability, unconventional resource reservoirs. Comprehensive, published and publicly available information regarding the extent, location and character of hydraulic fracturing and potential effects on regional or national water quality in the United States is scarce.

 

[출처 = Water World / 2015년 3월 5일]