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Full-Text Articles in Engineering
Experimental Study On Fracture Plugging Effect Of Irregular-Shaped Lost Circulation Materials, Chengyuan Xu, Honglin Zhang, Jiping She, Guobin Jiang, Chi Peng, Zhenjiang You
Experimental Study On Fracture Plugging Effect Of Irregular-Shaped Lost Circulation Materials, Chengyuan Xu, Honglin Zhang, Jiping She, Guobin Jiang, Chi Peng, Zhenjiang You
Research outputs 2022 to 2026
Using micro-visualization experimental device for the formation of fracture plugging zone, the plugging behavior of irregular-shaped lost circulation materials (LCMs) with different types and concentrations in fractures was experimentally analyzed. The results show that the sealing time decreases significantly with the increase of material concentration. When the concentration is 20%, the sealing times of materials LCM-1∼LCM-5 are 6s, 7s, 5s, 6s, 4s, respectively. The formation of fracture plugging zone includes two stages, and the main factors affecting the formation of fracture plugging zone are flatness, roundness, convexity and concentrations. Flatness affects the retention stage of LCMs through the matching degree …
Physical Plugging Of Lost Circulation Fractures At Microscopic Level, Chengyuan Xu, Honglin Zhang, Yili Kang, Jingyi Zhang, Yingrui Bai, Juan Zhang, Zhenjiang You
Physical Plugging Of Lost Circulation Fractures At Microscopic Level, Chengyuan Xu, Honglin Zhang, Yili Kang, Jingyi Zhang, Yingrui Bai, Juan Zhang, Zhenjiang You
Research outputs 2022 to 2026
Drilling fluid loss into formation fractures is one of the most common and costly problems encountered during the exploration and development of oil and gas resources. At present, the most extensive solution is to use physical lost circulation materials (LCMs) to form high-strength plugging zone in fractures. However, it is still unclear how the plugging is initiated and formed in the fracture. In this paper, a microscopic visualization experimental device for the formation of plugging zone is used to observe the dynamic plugging performance of spherical materials, flaky materials and fibers in fracture. Experimental results show that the formation of …