| 摘要 |
<p>A method of diverting treatment fluid into a low permeability zone of a hydrocarbon bearing formation wherein the formation is penetrated by a wellbore having a casing extending to below the low permeability zone and having at least one perforation (26) in the casing in fluid communication with the low permeability zone, the method comprising: (a) isolating (22, 23) a section of the wellbore having the perforation(s) in the casing in fluid communication with the low permeability zone of the formation; (b) pumping treatment fluid from a selected location in the wellbore into the isolated section of the wellbore by means of a downhole pumping (21) device at a rate sufficient to increase the pressure in the isolated section of wellbore to a value which is greater than the pressure at the selected location in the wellbore such that treatment fluid is diverted through the perforation(s) in the casing into the low permeability zone.</p> |
