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Core Data - Integration of Good Log Analysis During the STEZYCA Oil Gas Field Expedition

J. Wojtowicz, Polish Oil Gas Company, Warsaw

R . Kopczynski, Ltd., Wolomin PetroGeo

Copyright 2004, ***Co-organized by the Society of Petrophysicists and Well Log Analysts (SPWLA) and submitted by the author.

This paper was prepared for presentation at the SPWLA 45th Annual Logging Symposium held in Noordwijk, Netherlands,

June 6-9 2004.

ABSTRACT

The Stezyca oil and gas field is located in the central part of the Lublin Basin, in the southeastern part of Poland. Discovered in 1993.

Prospective horizons identified Upper Carboniferous sandstones in the river. 3D

Seismic interpretation, showing anticline structure with four gas and two oil tanks.

toNow, the ten wells are completed. Summary Locate gas and oil-bearing horizons

incised-valley "I2" unit of fill sandstone. The purpose of this work will exist to improve the "I2" subunit formation of the "I" horizon by evaluating core data and the results of good log synthesis. The sandstone of the "I2" subunit was cored (completely or partially) in each well. A series of petrophysical laboratory petrology and

analyses and measurements were performed

including: natural light and UV photography, core

description, to thin sections , SEM, XRD analysis of mineral composition, rock measurements

matrix density determination, porosity, horizontal

and vertical permeability, adhesion and

saturation Power measurement and bloodshot

pressure test.

The analysis and quantitative interpretation

well logs are performed by a computer program

with a set of logging methods according to a determined algorithm

approach. Includes following regular logs the: SGR, CNL or

DSN, SLD or CDL, BHCS, DIL, DLL, MSFL,

SED.

Core data - Good log analysis integration with reference to DST and production testing allows correction of the interpretation model of the application. Repeated formation assessment results using the improved model were used to calculate gas and oil reserves in the Stezyca field. Interactions

The “I2” Stezyca unit formation field

Between the selected wells, include the formation of the proposed evaluation and core data.