Detall

Short Workshop on Carbonate reservoirs: Is our carbonate reservoir fractured? Engineering says yes and geology says no!

Notícia | 06-06-2014

A càrrec de: Prof. Patrick Corbett
AAPG Distinguished Lecturer for FY 2013‐14
University Federal do Rio de Janeiro, Heriot‐Watt University
Dia: Divendres 6 de juny, 14:30‐17:00 h
Lloc: Aula Magna de la Facultat de Geologia





Is our carbonate reservoir fractured?
Engineering says yes and geology says no!



Information on fractured reservoirs is often controversial. Engineers see lost circulation, negative skin and fracture well test signatures. Geologists see only matrix properties in their cores. Geologists see fractures but engineers see only radial flow on their well tests. In many cases, the two lines of information concur and the evidence is uncontroversial. In other cases the information is not so clear. Engineering data is notoriously non‐unique and
because carbonate reservoirs have such high heterogeneity—over 30 possible forms of porosity—and many ways this can be connected (or not!) this is a real challenge. What is seen by geologists in small cores may not be seen in larger well tests. Alternatively what is 'seen' in the well tests may bear no link to the observed rocks. It is in these circumstances that the two specialists need to come together and understand each other's points of view and the
limitations of each other's data. This requires specialist knowledge with geoengineering insights to try and reach unification of geological and engineering models. All models are wrong—but the one both disciplines agree with is probably useful.

Closing the loop between geology and reservoir engineering in the building, calibration and history‐matching of carbonate reservoir models



It is quite common for reservoir engineers to adjust the geological modelling without recoursing to the geologists by multiplying the porosity, the permeability, the anisotropy (kv/kh), the relative permeabilities, the well factors and many other parameters within their numerical world. Sometimes these factors can be large and global and probably outside the limits of the geological reality. Of course it is not easy to go back and make these adjustments in a close cooperative environment for all sorts of reasons—logistical, technical, management, contractual to name a few. Rarely are these adjustments discussed and certainly there are very few published examples where the loop has been closed. This talk will attempt to illustrate where and how multipliers are applied, what might be the reasons and how the workflows could be streamlined to make closing‐the‐loop a routine process rather than an occasional occurrence.





This lectures and the further discussion will be complementary to other activities developed in our Faculty during this year.
We would encourage you to attend these lectures and participate.

Both lectures will be hold in the framework of the AAPG Distinguished Lecturer tour for FY 2013-14.


Registration

Further information on the lecturer and the scope of the two lectures


Comparteix-ho: