Citation: | ZHAO Xiangyang. Experimental study on influence of solid particles on stress sensitivity of fractures in tight oil and gas reservoirs [J]. Petroleum Drilling Techniques, 2024, 52(3):68-74. DOI: 10.11911/syztjs.2024050 |
Fractures in tight oil and gas reservoirs are critical fluid seepage channels, and their stress sensitivity significantly influences the production of oil and gas wells. Solid particles play a crucial role in affecting the stress sensitivity of fractures. This study examined the impact of solid particles on fracture stress sensitivity in a laboratory setting under various conditions, including the presence or absence of solid particles, different paving methods of solid particles, and varying particle concentrations. The results indicate that the stress sensitivity of fractures, ranked from highest to lowest, is as follows: no solid particles, fully paved with low-concentration solid particles, fully paved with medium-concentration solid particles, fully paved with high-concentration solid particles, half-filled with medium-concentration solid particles, and high-diversion and paved solid particles. The presence of solid particles effectively reduces the stress sensitivity of fractures, and the damage to the stress sensitivity of fractures is irreversible. These findings provide a theoretical basis for preventing and controlling damage to the stress sensitivity of fractures.
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