Advancements in LCM Laboratory Testing: Enhancing LCM Blend Effectiveness with Rock-Based Slot Testing

ABSTRACT: Lost Circulation Material (LCM) plays a critical role in managing depleted fracture gradients encountered in mature field operations. Traditionally, LCM blends are developed through slot testing and field experience. While slot testing provides quantitative results, its applicability is limited due to the mismatch between the properties of steel and the actual formation rock. In contrast, field monitoring of LCM effectiveness provides accurate results but comes at a higher cost. This study presents an advanced experimental setup designed to simulate overbalance drilling conditions with rock samples, providing a more representative assessment of LCM performance in field-like conditions. Using this insight, LCM formulas can be more accurately designed and use lower concentrations. This paper will discuss the experimental set up, testing procedures, laboratory, and field results for permeable slot testing.