Mud and data logging comprise two distinct but complementary operations which may be combined, or alternatively mud logging may be carried out on its own. 1       General Requirements Mud logging includes the following: Continuous logging of total gas and the chromatographic analysis of hydrocarbons. Detailed cuttings analysis including the description of lithology and hydrocarbon evaluation … Mud and Data Logging

This article describes the main geological services: Cutting sampling and description requirements. Cuttings Sampling Across reservoir: every 5 ft, and non-reservoir every 20 ft. Cutting samples shall be taken from the full width of the shakers so as to be representative of the interval drilled. When drilling at high ROP the drilling contractor shall assign … Mud Logging – Cutting sampling and description requirements

All the parameters specified in the contract scope of services shall be recorded against time and depth and continuously monitored. The following table lists the recording frequency and standard units to be used for all mud logging parameters. Parameters Parameter Recording Frequency Units Active pit volume Continuous – Alarmed bbls Reserve pit volumes & Trip … Mud Logging – Parameters Monitoring

A fully equipped computerised mud logging unit shall be available for recording and monitoring well generated data, for all exploration wells. There is no mandatory requirement for a full Mud Logging service for development wells which are not designated HTHP wells. Requirements The general requirements for the mud logging service to be provided are included … Mud Logging General Guidelines

Accurate cuttings descriptions are essential for the following 3 reasons: To pick out individual formation sequences as they are drilled, to establish stratigraphic position at all times, and hence to determine casing and coring points. To ensure that the well approaches the correct TD. To enable construction of a Well Completion Log, with all lithologies … Cuttings Sampling And Lithology Description