Mechanism and Mechanical Properties of Water-based Drilling Cuttings Solidified by Bio-carbonization
Drilling cuttings,as solid waste formed during oil and gas exploration and development,was mainly solidified by cement.However,a large amount of carbon dioxide is formed during cement production.Therefore,a more efficient and environmentally method is urgently found for solidifying drilling cuttings.Bio-carbonization is a new reinforcement method for loose particles,which provides a new idea for the solidification treatment of water-based drilling cuttings.The experiment of water-based drilling cuttings solidified via bio-carbonization demonstrated that the strength of solidified body was decreased by increasing water content and urea concentration,and increased with increasing reactive magnesium oxide concentration and curing time.The water-based drilling cuttings solidified bodies were analyzed using related characterization.The results indicated that rosette Hydromagnesite and acicular Nesquehonite were yielded via synergy of Bio-carbonization.The microstructure of water-based drilling cuttings solidified bodies was observed,the results indicated that water-based drilling cuttings were solidified with continuous carbonate networks.The feasibility of water-based drilling cuttings solidified with bio-carbonization was verified through above researches.
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