Daim ntawv thov ntawm stainless hlau screen nyob rau hauv natural gas hydrate xuab zeb tswj
Natural gas hydrate muaj cov peev txheej siab, kev faib tawm dav, thiab cov peev txheej siab heev. Nws raug suav hais tias yog ib qho ntawm cov peev txheej muaj peev xwm tshaj plaws hauv lub xyoo pua 21st. Txawm li cas los xij, raws li lub teb chaws sib sib zog nqus lawv cov kev tshawb fawb ntawm hydrate cov peev txheej thiab ua kom cov txheej txheem mining, tib neeg maj mam paub tias cov xuab zeb ntau lawm yog ib qho tseem ceeb txwv tsis pub hydrate mining. Hauv kev tsim cov khoom siv roj thiab roj ib txwm muaj, qhov teeb meem ntawm cov xuab zeb ntau lawm kuj daws tau zoo. Txawm li cas los xij, hydrate reservoirs tsis muaj zog cemented lossis uncemented. Tshwj xeeb tshaj yog tom qab hydrate decomposes, lub zog sib txuas ua me me, lub zog txo qis, qhov porosity nce, thiab cov khoom ntim dej ua kom nyuaj, uas ua rau muaj kev pheej hmoo ntawm cov xuab zeb ntau lawm. .
Yog li ntawd, nws yog ib qho tseem ceeb heev uas yuav tsum tau ua tib zoo kawm cov kev cai ntawm cov xuab zeb ntawm cov hydrate reservoirs, tsim cov xuab zeb tswj kev ntsuas tsim nyog, thiab tswj xyuas cov xuab zeb kom zoo. Ua ke nrog qhov tshwj xeeb ntawm hydrate reservoir mining, cov khoom siv xuab zeb tsim rau hydrate mining tau tsim. Nyob rau tib lub sijhawm, cov kev cai xuab zeb ntau lawm ntawm hydrate tau kawm nrog kev pab los ntawm hydrate acoustic yoj xyuas qhov system.
By selecting screens with different aperture specifications, the sand control test of hydrate formations was carried out, and analysis was conducted from various aspects such as sand production, permeability, sand content and production capacity. If the aperture of the sand control screen is too large, then the production pressure difference will When the sand production is less than 1MPa, the sand production accounts for 19% of the liquid production. The sand production is serious. When the aperture of the sand control screen is greater than 15 times the median particle size, that is, ω>15d50, cov xuab zeb tswj tsis zoo; rau lub aperture Rau cov ntxaij vab tshaus me (ω<4.2d50), the production pressure difference must be controlled within a certain range (<5MPa), otherwise the sand will block the channels and greatly reduce the permeability. Within the range of moderate sand production (7.8~13t/10,000 m~3), the apertures of the screen are defined as 400 mesh (38 μm) and 350 mesh (42 μm). Based on the principle of safety priority, the 400 mesh screen is selected.
