Abstract

Oil and gas exploration and production activities generate large amounts of waste material, especially during well drilling and completion activities. Waste material from drilling activities to the greatest extent consists of drilled cuttings and used drilling mud with a smaller portion of other materials (wastewater, produced hydrocarbons during well testing, spent stimulation fluid, etc.). Nowadays, growing concerns for environmental protections and new strict regulations encourage companies to improve methods for the reduction of waste material, as well as improve existing and develop new waste disposal methods that are more environmentally friendly and safer from the aspect of human health. The main advantages of the waste injection method into suitable deep geological formations over other waste disposal methods (biodegradation, thermal treatment, etc.) are minimizing potentially harmful impacts on groundwater, reducing the required surface area for waste disposal, reducing the negative impact on the air and long-term risks for the entire environment. This paper gives a comprehensive overview of the underground waste injection technology, criteria for the selection of the injection zone and methods required for process monitoring, as well as a comprehensive literature overview of significant past or ongoing projects from all over the world.

Highlights

  • Oil and gas industry through exploration and production (E&P) activities generate large amounts of different waste through several different processes, including wellbore drilling, well completion and workover, reservoir stimulation and hydrocarbons production, as well as transporting and storage of hydrocarbons and associated products

  • Probably the largest amounts of waste during oil and gas E&P activities are generated during the development of unconventional reservoirs, because large amounts of water are required for reservoir stimulation through the massive fracturing of reservoir rock

  • Deep underground waste injections (cutting reinjection (CRI) or downhole waste injection (DWI)) are still the most economic methods for the disposal of waste generated through exploration and production activities in comparison with other available waste disposal methods [26,27]

Read more

Summary

Introduction

Oil and gas industry through exploration and production (E&P) activities generate large amounts of different waste through several different processes, including wellbore drilling, well completion and workover, reservoir stimulation (fracturing and acidizing) and hydrocarbons production, as well as transporting and storage of hydrocarbons and associated products (carbon dioxide, produced/wastewater, etc.). Drilling activities on their own generate the second largest amount of waste, following reservoir water produced during oil and gas production [1–4]. Oil and gas companies generate smaller quantities of waste during drilling activities for the same drilled volume of the rock in comparison to the past because of the implementation of the smart waste management strategy during the field development planning phase

Overview of Oil and Gas Exploration and Production Waste Disposal Methods
History of the Drilling Waste Underground Injection
Injection Methods and Equipment
Selection
Annular Injection of Drilling Waste
Tubular Injection of Drilling Waste
Waste Slurry Preparation and Disposal Unit
Waste Slurry
January 1990–13
Criteria for the Injection Zone Selection and Characterization
Disposal
Injection Well Integrity
Injection Process Monitoring
10. Abandonment and Plugging of Injection Wells
11. Discussion and Conclusions
Distribution
Findings
Conclusions

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.