Preparation and performance evaluation of acid-soluble weighting materials for deep well drilling
The high-density drilling fluid system,weighted with barite,has several issues such as easy settlement of solids,poor fluidity,and contamination of reservoirs due to its high content of insoluble solids.Micro-manganese exhibits excellent settling stability,rheology,and reservoir protection effect in high-density drilling fluid systems abroad;however,its application in China is limited due to its high cost.In this paper,a low-cost ultrafine spherical manganous oxide acid-soluble weighting agent(GCMn-01)was prepared using pyrolusite as the raw material.The basic properties of the weighting agent,such as component content,particle size distribution,micro-morphology,sphericity,magnetism and acid solubility,were analyzed,and the properties of micro-manganese weighting drilling fluid systems with different densities were compared and analyzed.The results showed that the ultraspherical GCMn-01 weighted agent exhibited high sphericity,a smooth surface,and good dispersion.Its properties and indexes were comparable to those of the imported Micromax micro-manganese weighted agent,and it demonstrated high compatibility with water-based polysulfonate drilling fluid.Drilling fluid systems with densities ranging from 1.6 to 2.4 g/cm3 could be prepared,effectively cleaning the fracture channels of the reservoir and reducing reservoir damage.
Trimanganese tetroxideweighting agentacid solubledrilling fluiddeep well
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维普
