Click to hide Figure 1.
Example - "Fracturing" is Possible in Soft Sands
Reservoir and Completion Characteristics:
This is for a deepwater, turbidite reservoir. Thin layers of unconsolidated sand (k = 400 md) between shale sections. The unconfined compressive strength of the sand varies from 100 to 300 psia.
Two injectors were cased and perforated; one injector has wire wrap screens in open hole. The wells inject under fracturing conditions and are able to maintain rate at an approximately constant BHP. However, required injectivity could only be obtained by fracturing. This is not so much an example of stimulation, but an indication that fracturing (or some manifestation of higher pressure injection) is possible in soft formations. Figure 1 shows the injection performance.
| View Figure 1: | Rate and pressure versus time. |
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