| 摘要 |
<p>Sand in unconsolidated subterranean formations causes problems in oil recovery, which can be overcome by a method of consolidating sand in a subterranean formation, which method comprises:
(i) contacting said sand in a first location in the presence of water with a slurry in a liquid medium of cement of average particle size less than 10 microns to produce in said medium a mixture comprising sand, water and some of the cement, and a remainder comprising the rest of the cement,
(ii) preferably separating in said location at least part of said remainder from at least part of said mixture,
(iii) which is allowed to set to give permeable consolidated sand.</p> |
