Well Performance Modeling in Unconventional Oil and Gas Wells

2018 ◽  
Author(s):  
Adeoluwa Oyewole ◽  
Mohan Kelkar ◽  
Eduardo Pereyra ◽  
Cem Sarica
Keyword(s):  
Performance Modeling ◽  
Oil And Gas ◽  
Well Performance ◽  
Gas Wells ◽  
Unconventional Oil ◽  
Oil And Gas Wells ◽  
Unconventional Oil And Gas

A community-based evaluation of proximity to unconventional oil and gas wells, drinking water contaminants, and health symptoms in Ohio

2018 ◽  
Vol 167 ◽  
pp. 550-557 ◽  
Author(s):  
Elise G. Elliott ◽  
Xiaomei Ma ◽  
Brian P. Leaderer ◽  
Lisa A. McKay ◽  
Courtney J. Pedersen ◽  
...  
Keyword(s):  
Drinking Water ◽  
Oil And Gas ◽  
Gas Wells ◽  
Community Based ◽  
Water Contaminants ◽  
Health Symptoms ◽  
Unconventional Oil ◽  
Oil And Gas Wells ◽  
Unconventional Oil And Gas

MICROBIOMES OF UNCONVENTIONAL OIL AND GAS WELLS IN WYOMING

2018 ◽  
Author(s):  
Karen Wawrousek ◽  
◽  
Donna Drogos ◽  
Charles Nye ◽  
Scott Quillinan
Keyword(s):  
Oil And Gas ◽  
Gas Wells ◽  
Unconventional Oil ◽  
Oil And Gas Wells ◽  
Unconventional Oil And Gas

scholarly journals Geochemical data for produced waters from conventional and unconventional oil and gas wells: Results from Colorado, USA

2019 ◽  
Vol 98 ◽  
pp. 03002
Author(s):  
Yousif Kharaka ◽  
Kathleen Gans ◽  
James Thordsen ◽  
Madalyn Blondes ◽  
Mark Engle
Keyword(s):  
Oil And Gas ◽  
Produced Water ◽  
Geochemical Data ◽  
Chemical Compositions ◽  
Gas Wells ◽  
Horizontal Drilling ◽  
Unconventional Oil ◽  
Oil And Gas Wells ◽  
Unconventional Oil And Gas ◽  
Produced Waters

Geochemical data for more than 120,000 oil and natural gas wells from the major sedimentary basins in the USA are listed in the USGS National Produced Waters Geochemical Database [1]. In this summary, we report and discuss the geochemical data on produced waters obtained from published literature and the Colorado Oil and Gas Conservation Commission (COGCC) from close to 4,000 new oil and gas wells in Colorado. We emphasize geochemical data of produced waters from shale and tight reservoirs that have increased dramatically in Colorado since 2011, due to deep horizontal drilling, downhole telemetry and massive multi-stage hydraulic fracturing. These operations require large volumes of fresh water, but contamination of groundwater is the major environmental concern. Also, induced seismicity caused by water injection has been reported from several areas in Colorado, including Trinidad, Raton basin, and Greely, Denver basin. Produced water salinities in Colorado obtained from unconventional oil and gas wells are relatively low, generally less than 30,000 mg/L TDS. Produced water salinities from conventional oil and gas wells overlap those from unconventional wells, but many wells have higher salinities (up to 90,000 mg/L TDS) and different chemical compositions.

scholarly journals Hydraulic fracturing near domestic groundwater wells

2017 ◽  
Vol 114 (50) ◽  
pp. 13138-13143 ◽  
Author(s):  
Scott Jasechko ◽  
Debra Perrone
Keyword(s):  
Hydraulic Fracturing ◽  
Oil And Gas ◽  
Water Quality Monitoring ◽  
Water Safety ◽  
Gas Wells ◽  
Drinking Water Safety ◽  
Oil And Gas Wells ◽  
Unconventional Oil And Gas ◽  
Considerable Discussion ◽  
Groundwater Wells

Hydraulic fracturing operations are generating considerable discussion about their potential to contaminate aquifers tapped by domestic groundwater wells. Groundwater wells located closer to hydraulically fractured wells are more likely to be exposed to contaminants derived from on-site spills and well-bore failures, should they occur. Nevertheless, the proximity of hydraulic fracturing operations to domestic groundwater wells is unknown. Here, we analyze the distance between domestic groundwater wells (public and self-supply) constructed between 2000 and 2014 and hydraulically fractured wells stimulated in 2014 in 14 states. We show that 37% of all recorded hydraulically fractured wells stimulated during 2014 exist within 2 km of at least one recently constructed (2000–2014) domestic groundwater well. Furthermore, we identify 11 counties where most (>50%) recorded domestic groundwater wells exist within 2 km of one or more hydraulically fractured wells stimulated during 2014. Our findings suggest that understanding how frequently hydraulic fracturing operations impact groundwater quality is of widespread importance to drinking water safety in many areas where hydraulic fracturing is common. We also identify 236 counties where most recorded domestic groundwater wells exist within 2 km of one or more recorded oil and gas wells producing during 2014. Our analysis identifies hotspots where both conventional and unconventional oil and gas wells frequently exist near recorded domestic groundwater wells that may be targeted for further water-quality monitoring.

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