Commonly Used Biodegradation Techniques for Drilling Fluid Chemicals, Are They Appropriate?

Slater, Monica; Hille, M.H.; Molversmyr, Åge

doi:10.2523/29376-ms

Cited by 5 publications

(3 citation statements)

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“…Vic, Slater and Bland [5][6][7]13 have previously addressed the sources of variability observed in biodegradation testing of synthetic-based fluids. These issues are discussed in SPE 52742.…”

Section: • No Direct Measurement Of Base Fluid Biodegradationmentioning

confidence: 99%

“…These tests were generally found to be deficient meeting one of the design criteria discussed below. [4][5][6][7][8][9] Attempts to identify new tests that improve the ability to identify biodegradation rates of synthetic fluids have focused on simulated seabed studies and laboratory incubations of field collected sediment spiked with synthetic fluids. 7,[10][11] While these tests appeared to be well suited for research purposes, they continue to exhibit limitations when they are used as regulatory tools to identify acceptable base fluids.…”

Section: Introductionmentioning

confidence: 99%

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Modification of a Standardized Anaerobic Biodegradation Test to Discriminate Performance of Various Non-Aqueous Base Fluids

Candler¹,

Lee

Rabke³

et al. 2000

SPE International Conference on Health, Safety and Environment in Oil and Gas Exploration and Production

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractThe inability to consistently discriminate biodegradation performance inhibits the development and use of Synthetic-Based Muds ( SBMs) and other non-aqueous base fluids. Government regulators and industry representatives are discussing and seeking to improve the repeatability, discriminatory power and environmental relevance of the current bottle and simulated seabed biodegradation tests. To date, the existing protocols and procedures are only moderately successful in discriminating the performance of various base fluids. This study provides information on the modification and development of an existing freshwater anaerobic test (ISO/DIS 11734) 1 for use as a marine sediment anaerobic biodegradation test. This paper reviews and compares the repeatability, discriminatory power, practicality and ecological relevance of the modified test relative to the performance of other biodegradation tests and field data.

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Section: • No Direct Measurement Of Base Fluid Biodegradationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modification of a Standardized Anaerobic Biodegradation Test to Discriminate Performance of Various Non-Aqueous Base Fluids

Candler¹,

Lee

Rabke³

et al. 2000

SPE International Conference on Health, Safety and Environment in Oil and Gas Exploration and Production

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“…Additionally, all non-water drilling mud base fluids are required to undergo biodegradability testing under Nigerian environmental conditions as a permit requirement for their use in Nigeria 6 . In the absence of a standard and widely accepted method for biodegradability testing, and based on review findings 8,9,10 on existing methods, the recently developed Solid Phase Biodegradation Test was selected for application in Nigeria. The relevance of the method to environmental conditions affecting discharged drill cuttings impregnated with non-water drilling mud base fluids was the primary consideration in its selection.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Assessment of Biodegradation of Non Soluble Drilling Mud Base Fluids Under Nigerian Environmental Conditions

Imevbore

Nwankwo²,

Ifeadi³

et al. 2000

SPE International Conference on Health, Safety and Environment in Oil and Gas Exploration and Production

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractIn Nigeria today, the environmental acceptance of a non watersoluble drilling mud base fluid depends not only on its toxicity as measured from traditional bioassays, but also on its biodegradation under aerobic and anaerobic conditions. Presently, however, there is no widely accepted laboratory method for biodegradability assessment of drilling fluids.Based on its relevance to environmental conditions affecting the biodegradation of drilling fluids, the recently developed Solid Phase Biodegradation Test Method was chosen for assessment of drilling fluids in Nigeria. The test was modified, essentially to ensure better simulation of Nigerian environmental conditions. Thus, the Nigerian version of the method is a 60 day "closed system" Test that entails the assessment of a given sample in both fresh and brackish/marine water simulated environmental conditions. The biodegradation assessment of three drilling fluid types: an ester, an olefin and a mixture of both was carried out using the Nigerian version of the Solid Phase Test. The results obtained are presented in this paper. They compare favorably with and validate other Solid Phase Test results, which show olive oil to be a ready degradable substance and esters as having a generally higher percentage degradation than other synthetic base fluids. In this test, percentage biodegradation was observed to be higher in the brackish/marine water than in the freshwater simulated environment.

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Aerobic and anaerobic biodegradation of synthetic drilling fluids in marine deep-water offshore environments: Process variables and empirical investigations

2023

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Commonly Used Biodegradation Techniques for Drilling Fluid Chemicals, Are They Appropriate?

Cited by 5 publications

References 0 publications

Modification of a Standardized Anaerobic Biodegradation Test to Discriminate Performance of Various Non-Aqueous Base Fluids

Modification of a Standardized Anaerobic Biodegradation Test to Discriminate Performance of Various Non-Aqueous Base Fluids

Laboratory Assessment of Biodegradation of Non Soluble Drilling Mud Base Fluids Under Nigerian Environmental Conditions

Aerobic and anaerobic biodegradation of synthetic drilling fluids in marine deep-water offshore environments: Process variables and empirical investigations

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