Manage high risk of water production in candidate wells for hydraulic fracture
An operator had been exploiting a Tertiary sandstone formation for more than 60 years. During that time, operations consistently experienced water production and low reservoir pressure. In many fields requiring hydraulic fractures, the water contact or a zone with high water saturation zone nearby the sand of interest lowers the number of candidate wells for hydraulic fracture treatments.
The operator produced from several sandstone fields suitable for hydraulic fracturing treatments in southern Mexico, where water cut is 14% on average. Petrophysical evaluations commonly identify clear water/oil contact or a high water saturation zone close to the interval of interest. The operator wanted to increase the frequency of hydraulic fracturing treatments in wells that had been identified as having a nearby high water saturation zone, and thereby increase daily oil production and unlock recoverable reserves.
Fracture using preflush FracCON fluid to avoid water production
FracCON fluid is most commonly used in wells where there is a high probability that the fracturing treatment will grow into a known water zone or when the reservoir has a water saturation higher than 40%. The fluid combines a relative