56 9.3 CORE CHIP DESCRIPTION FORM.58 9.4 PERCUSSION SIDEWALL CORE DESCRIPTION.60 9.5 ROTARY SIDEWALL CORE DESCRIPTION.61 9.✔ Download as many books as you like (Personal use) GEOLOGICAL WELLSITE PROCEDURES Table of Contents 1 PREAMBLE.1 1.1 DUTIES AND RESPONSIBILITIES OF THE WELLSITE GEOLOGIST.1 1.2 REPORTING FROM WELLSITE.1 1.3 SAMPLE DESCRIPTION.2 1.4 MUDLOGGING SUPERVISION.3 1.5 CORING.3 1.6 WIRELINE LOGGING.4 1.7 PRODUCTION TESTING/DRILL STEM TESTING.5 1.8 LIAISON WITH WELLSITE MANAGER (DRILLING SUPERVISOR).5 1.9 DATA DISTRIBUTION.5 1.10 CONFIDENTIALITY.5 1.11 DATA COMPILATIONS.6 1.12 WELLSITE SUPPLIES.6Ģ REPORTING PROCEDURES.7 2.1 INTRODUCTION.7 2.2 MORNING AND AFTERNOON DAILY REPORTS.7 2.3 DAILY REPORTING.9ģ SAMPLE DESCRIPTION.12 3.1 INTRODUCTION.12 3.2 DISCUSSION OF ELEMENTS COMPRISING A LITHOLOGICAL DESCRIPTION.12Ĥ SHOW EVALUATION.22 4.1 INTRODUCTION.22 4.2 REPORTING OF SHOWS.22 4.3 SHOW EVALUATION FORM.23 4.4 MUD GAS SHOWS.23Ĥ.5 ROUTINE HYDROCARBON DETECTION METHODS FOR CUTTINGS.25 4.6 OTHER HYDROCARBON DETECTION METHODS FOR CUTTINGS.27 4.7 GENERALISATIONS.29ĥ DRILLING BREAKS, CORING AND SIDEWALL CORING.30 5.1 DRILLING BREAKS.30 5.2 CORING.30 5.3 SIDEWALL CORING.34Ħ MUDLOGGING NOTES.36 6.1 INTRODUCTION.36 6.2 LAG TIME.36 6.3 TOTAL GAS DETECTOR.37 6.4 GAS CHROMATOGRAPH.37 6.5 DRILL RATE.38 6.6 PIT LEVELS.38 6.7 OTHER COMMON EQUIPMENT.38 6.8 SAMPLING PROCEDURES (CUTTINGS).38 6.9 EVALUATION OF MUDLOG SHOWS.39 6.10 FALSE HYDROCARBON SHOWS.40 6.11 PROBLEMS IN INTERPRETING CUTTINGS.41 6.12 MISCELLANEOUS INTERPRETATION PROBLEMS.43ħ GEOCHEMICAL SAMPLING.45 7.1 INTRODUCTION.45 7.2 CANNED CUTTINGS SAMPLES.45 7.3 MUD SAMPLES.45 7.4 SIDEWALL CORES (SWC).45 7.5 CORE CHIPS.45Ĩ GEOPRESSURES.46 8.1 ORIGIN OF ABNORMAL PRESSURES.46Ĩ.2 DETECTION OF GEOPRESSURES DURING DRILLING.47 8.3 PRESSURE DETECTION AFTER DRILLING.51ĩ REPORTING FORMS.52 9.1 WELLSITE GEOLOGIST'S CHECKLIST.53 9.2 DAILY GEOLOGICAL REPORT. It is hoped that persons who have direct experience in any of these topics will assist in improving the procedures by passing pertinent comments to the attention of the Operations Geologist. The Procedures are compiled to provide an overview of the responsibilities of the Wellsite Geologist followed by chapters in which individual topics are discussed in more detail. The principal purpose of this document, therefore, is to provide a reasonable and consistent approach to the conduct of field operations, not to dictate a rigid code of practice. The successful conduct will, require the application of initiative and professionalism consistent with the prevailing conditions. PREFACE This document is intended for the guidance of the Wellsite Geologist. Black text - OK Red text - check with OMV re – details - is it required?
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