Ven-Chem 396™ is an oil-dispersible, powdered organophilic lignite blend engineered for superior filtration control in oil base, synthetic base and invert emulsion mud systems. Ven-Chem 396™ is a chemically modified, organophillic lignite. Ven-Chem 396™ provides rapid and effective reduction of excessive fluid loss in diesel, mineral and synthetic oil based fluids at high bottom-hole temperatures. Secondary benefits of Ven-Chem 396™ treatments are improved emulsion stability, improved suspension, and more stable rheological properties. (Thermal stability typically up to 400 F).