Page 221 - Petroleum and Gas Field Processing

(type II in Table 1). These are built under API Standard 650. They may
have floating roofs of the double-deck or single-deck type. These are lifter-
roof types in which the roof either has a skirt moving up and down in an
annular seal or is connected to the tank shell by a flexible membrane.

8.1.3 Sizing the Storage Tanks
The following is the guidelines to estimate the storage capacity for an oil-
producing facility; select the number of storage tanks of crude oil.
1. To determine the capacity of storage tanks, the following rules
apply:

(a) For one well, the capacity per storage tank should be
adequate enough for at least 2–3 days’ production.
(b) For a group of wells (entire field), the total tank capacity
should be adequate enough for at least 3–4 days of oil
production by that field.
2. To determine the number of storage tanks as a function of the
number of producing wells. This relationship is represented
graphically in Figure 2.
To illustrate the application of these guidelines, the following example is
cited. However, it should be emphasized that their use is restricted to
small- to medium-size oil field installations.

Figure 2 Guidelines for selecting the number of storage tanks as a function of the
number of producing wells (for small- to medium-size installations).

Copyright 2003 by Marcel Dekker, Inc. All Rights Reserved.