[First Hit]

Datapages, Inc.Print this page

Eslinger, Eric1, Robert Everett2, Scotty Tuttle3, David Dennard3
(1) Eric Geoscience, Inc. and The College of Saint Rose, Glenmont, NY
(2) Consultant, Victoria, BC
(3) Dominion E&P, Inc. (currently Mission Resources, Inc.), Houston, TX

ABSTRACT: Net Pay from Previous HitPetrophysicalNext Hit Previous HitAnalysisNext Hit of 29 Wilcox Previous HitWellsNext Hit, SW Bonus Previous HitFieldNext Hit, Wharton County, Texas, using a Multi-Well and Multi-Dimensional Clustering Previous HitAnalysisNext Hit Coupled with a Mineralogy-Based Forward Modeling Procedure

A Previous HitpetrophysicalNext Hit Previous HitanalysisNext Hit was made in a ~3000 feet thick Wilcox Formation multiple-sand gas-bearing sequence in 29 Previous HitwellsNext Hit from Southwest Bonus Previous HitFieldNext Hit, Wharton County, Texas. A 29-well clustering Previous HitanalysisNext Hit using RHOB, NPHI, GR, and DT was used to probabilistically assign samples in each well to ten "rock types" (5 sandstones, 3 siltstones, and 2 shales). The only well with whole core was used as a "model" well. Porosity, permeability, and water saturation profiles were determined for the model well using a forward-modeling procedure based on: 1- the clustering results; 2- the mineralogy of each cluster; 3- a database for well log responses for minerals and fluids; and 4- a published (by others) method that uses porosity, grain density, and mineralogy surface area to estimate permeability. The same inputs used for the model well were also applied to the other 28 Previous HitwellsNext Hit.
Net pay was computed in each well using a suite of five cutoff parameters: total porosity, free porosity, permeability, bulk volume water, and water saturation. "Opportunity" was defined to be depths where net pay exists but where no perforations had been made. Total net pay (all Previous HitwellsNext Hit) was 4382 feet and total "opportunity" was 2338 feet. Therefore, "opportunity" footage was 53% of total net pay.
The same 29 Previous HitwellsNext Hit also were analyzed using a modification of the ECS* (Elemental Capture Spectroscopy [Schlumberger] procedure), and the resulting Previous HitpetrophysicalTop profiles were similar to those obtained using the clustering and forward modeling procedure.

 

AAPG Search and Discovery Article #90026©2004 AAPG Annual Meeting, Dallas, Texas, April 18-21, 2004.