Locating the Remaining Hydrocarbons
The most important task for the production geologist is to help get more hydrocarbons out of the reservoirs they work on. The geologist has the most intimate knowledge of the reservoir architecture and is the best placed to find out where the unproduced volumes of oil or gas are to be found.
A problem area for the modern production geologist is that modern methods of production geology are so biased toward computer analysis that it is easy to overlook that certain aspects of the job still involve old fashioned pencil, paper, and thinking power. This is the effort of data integration and the related activity of locating the remaining oil. These tasks are so essential to the success of the subsurface operation, it is important that the production geologist does not become occupied in only building geological models. Once a systematic search for the remaining oil is made, it can be surprising how much hitherto unsuspected stranded volumes can be found. It is considered that this section is the most important in this book. It will describe the various patterns in which oil (and gas) can be stranded in reservoirs. A workflow will then be followed through giving a methodology for locating the remaining oil using both qualitative and quantitative methods. The key method involves identifying and if possible validating the number and location of drainage cells in a reservoir. Maturity tables can then be compiled to determine which drainage cells have enough remaining oil volumes to warrant further investigation
Figures & Tables
Oil Field Production Geology
This book was written for students, new professionals in oil companies, and for anyone with an interest in reservoir geology. It explains the background to production geology in the context of oil field subsurface operations. It also gives practical guidelines as to how a production geologist can analyze the reservoir geology and fluid flow characteristics of an oil field with the aim of improving hydrocarbon recovery. Advice is given on how to search for the remaining oil volumes in a producing field, where these pockets are typically found, and then how to plan wells to target these volumes.