Monthly Archives for August 2009

Gravity Separation Process

Most oil-treating equipment relies on gravity to separate water droplets from the oil continuous phase, because water droplets are heavier than the volume of oil they displace. However, gravity is resisted by a drag force caused by the droplets’ downward … Continue reading

31. August 2009 by and
Categories: Crude Oil Treating System | Tags: , | Leave a comment

Emulsifying Agent

When thinking about emulsion stability, it may be helpful to realize that in a pure oil and pure water mixture, without an emulsifying agent, no amount of agitation will create an emulsion. If the pure oil and water are mixed … Continue reading

30. August 2009 by and
Categories: Crude Oil Treating System | Tags: , , , , | Leave a comment

Forming Emulsions Process

For an emulsion to exist there must be two mutually immiscible liquids, an emulsifying agent, and sufficient agitation to disperse the discontinuous phase into the continuous phase. In oil production, oil and water are the two mutually immiscible liquids. An … Continue reading

23. August 2009 by and
Categories: Crude Oil Treating System | Tags: , | Leave a comment

Crude Oil Treating System

Removing water from crude oil often requires additional processing beyond gravitational separation. In selecting a treating system, several factors should be considered to determine the most desirable methods of treating the crude oil to contract requirements. Some of these factors … Continue reading

23. August 2009 by and
Categories: Crude Oil Treating System | Tags: , | Leave a comment

Horizontal Three Phase Separator Part 2

Figure 5-3 shows an alternate configuration known as a “bucket and weir” design. This design eliminates the need for a liquid interface controller. Both the oil and water flow over weirs where level control is accomplished by a simple displacer … Continue reading

21. August 2009 by and
Categories: Oil and Water Separation | Tags: , , , , , , , , | Leave a comment

Horizontal Three Phase Separator Part 1

Three phase separator are designed as either horizontal or vertical pressure vessel. Figure 5-2 is a schematic of a horizontal separator. The fluid enters the separator and hits an inlet diverter. This sudden change in momentum does the initial gross … Continue reading

21. August 2009 by and
Categories: Oil and Water Separation | Tags: , , , , | Leave a comment

Water Treatment Process

Water Treatment describes choosing a process for this subsystem, including vessel and open drains. Figure 2-13 shows an enlargement of the watertreating system for the example.

21. August 2009 by and
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Lease Automatic Custudy Transfer

In large facilities oil is typically sold through a LACT unit, which is designed to meet API Standards and whatever additional measuring and sampling standards are required by the crude purchaser. The value received for the crude will typically depend … Continue reading

21. August 2009 by and
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Oil Treating Process

Most oil treating on offshore facilities is done in vertical or horizontal treaters, such as those described in “Crude Oil Treating System“. Figure 2-8 is an enlargement of the oil treater in Flow Sheet. In this case, a gas blanket … Continue reading

21. August 2009 by and
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Process Separator Operating Pressure

The choice of separator operating pressures in a multistage system is large. For large facilities many options should be investigated before a final choice is made. For facilities handling less than 50,000 bpd, there are practical constraints that help limit … Continue reading

20. August 2009 by and
Categories: Separation | Tags: , | Leave a comment

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