163:. Therefore, it is essential for the operator to pay attention to the pressures as recorded and to the quantity pumped. A premature increase in pressure is sign of a potential blockage and continuing to pump risks burst pressure retaining components. Pumping more than an anticipated amount of fluid is a sign of a loss of integrity and a potential leak path somewhere. In either of these two situations, pumping must be stopped and the potential causes analysed.
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It is vital to know the effective capacity of the completion being filled in order to understand what are sensible volumes. If pumping is to continue until reaching a desired pressurisation, then the compressibility of the fluid will become significant. It is therefore important to know how much
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or, if an intervention rig up is present pumping into the riser through a T-piece (a small section of riser with a connection on the side). Pumping is most routinely done to protect the well against scale and hydrates through the pumping of scale inhibitors and methanol. Pumping of kill weight
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Therefore, it is expected that 303.15 bbl are required to accomplish this task. If 3000 psi is achieved prior to this quantity being pumped, a blockage is to be suspected. If after pumping 303 bbl, pressurisation is not achieved, a leak is to be suspected.
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and more exotic chemicals may be pumped from surface for cleaning the lower completion or stimulating the reservoir (though these types are jobs are more frequently done with
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where ΔV is the change in volume, P is the pressure at surface and V is the volume of fluid unpressurised. k is a compression factor approximately 3.5×10 psi.
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is a routine operation involving injecting fluids into the well. Pumping may either be done by rigging up to the kill wing valve on the
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Work involving wells is fraught with difficulties as there is often very little information about the real time condition of the
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For example, a volume of 300 bbl is to be filled with brine and pressurised to 3000 psi at the surface. The compression is
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the fluid will compress under pressure to know how much extra fluid is expected to be required.
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343:{\displaystyle \Delta V=3000psi\times 300bbl\times 3.5\times 10^{-6}psi^{-1}}
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As a rule of thumb in the oilfield, compression is governed by the equation:
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159:. This lack of knowledge also covers potential damage and even loss of
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210:{\displaystyle \Delta V=P\times V\times k}
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114:Learn how and when to remove this message
139:brine may be done for the purposes of
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48:adding citations to reliable sources
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381:{\displaystyle \Delta V=3.15bbl}
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151:Importance of knowing quantity
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249:{\displaystyle \Delta V=PVk}
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63:"Pumping" oil well
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167:Compressed volumes
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59:Find sources:
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42:Please help
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141:well kills
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404:Oil wells
358:Δ
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306:×
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264:Δ
229:Δ
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184:Δ
136:Xmas tree
128:oil wells
31:does not
398:Category
104:May 2017
132:pumping
88:scholar
52:removed
37:sources
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95:JSTOR
81:books
367:3.15
273:3000
67:news
35:any
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364:=
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270:=
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