1887

Abstract

Summary

Pore pressure prediction in unconventional plays presents a unique set of challenges and uncertainties. These are the result of uncertainty in the measurements, the low permeability of the reservoir, and changes caused by industry activity. Slow pressure changes during production tests or diagnostic fracture injection tests (DFITs) require significant extrapolation to obtain the reservoir pressure. A third source of data comes from the mud weight required to control a kick. Unconventional reservoirs are often drilled underbalanced and if the kick is the result of encountering a natural fracture, the mud weight required may be lower than the reservoir pressure due to the limited hydrocarbon volume of the fracture. The uncertainty in the measurements result in a wide range of pressures that can make it difficult to identify important outliers caused by geological differences or by industry activity in the area. Kicks close to lithostatic pressure can be encountered when drilling into a hydraulic fracture of a nearby well. This can have major safety and financial implications. Regulations have been put in place requiring operators to identify offset wells that could be affected by hydraulic fracturing operations and work together with their competitors to stay safe.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201900498
2019-05-19
2020-04-08
Loading full text...

Full text loading...

References

  1. BCOGC
    BCOGC [2019]. Oil and Gas Activity Operations Manual Version 1.23: February 2019. British Columbia Oil and Gas Commission.
    [Google Scholar]
  2. Couzens-Schultz, B.A., Axon, A., Azbel, K., Hansen, K.S., Haugland, M., Sarker, R., Tichelaar, B., Wieseneck, J.B., Wilhelm, R., Zhang, J. and Zhang, Z.
    [2013]. Pore Pressure Prediction in Unconventional Resources. International Petroleum Technology Conference paper #16849.
    [Google Scholar]
  3. DACC
    DACC [2016]. IRP 24: Fracture Stimulation. An Industry Recommended Practice (IRP) for the Canadian Oil and Gas Industry. Drilling and Completion Committee, Enform Canada. Volume 24 - 2016.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201900498
Loading
/content/papers/10.3997/2214-4609.201900498
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error