This article describes the mains components of the coring assemblies: coring bits, core barels and drillstring. Coring Bits Coring Contractor shall provide a range of diamond coring heads. The bit shall be run depending on the previous performance and grading. Face discharge core heads shall be used in unconsolidated formations. Core Barrels The length of … Coring Assemblies
Cores are taken in order to measure accurately the reservoir parameters in hydrocarbon and water bearing formations, and for geological purposes. Whether a conventional steel/aluminium inner barrel coring or fibreglass inner barrel coring technique will be used for a particular well is specified in the drilling or test programme and is based on the expected … Core Handling and Evaluation
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
Pipe conveyed logging (PCL) logging is performed when conventional wireline operations are not feasible, such as in high angle/horizontal wells. If there is doubt as to whether wireline logging will be successful, consideration should be given to mobilising PCL equipment on standby, although the standby cost should be balanced against the likelihood of its required … Pipe Conveyed Logging (PCL) – Preparation and General Guidelines
More fatalities occur during free point indication/ backoff than during any other wire-line operation except perforating. In Free Point Indication/ Backoff (FPI/ BO) operations, the travelling block is required for working the drill pipe and consequently the upper sheave has to be installed in the certified, permanent upper sheave support in the Drilling Mast. Precautions such as … Free Point Indication/ Backoff (FPI/ BO)
This article discusses perforating casing with the use of wireline for: carrying out remedial casing cementing, by squeezing through perforations and for monitoring of (formation) pressures behind the casing. 1 Casing perforation A meeting should be held prior to rigging up for perforation, with the following staff present: Logging Engineer/ Well Site Geologist Well Service … Wireline Logging – Perforation
This article provides cable and weak strength for Schlumberger and Baker Atlas Logging Cables And Weak Points – Schlumberger CABLE DIAMETER WT/FT BREAK. STRAIN (INS.) (LBS) (LBS) _______________________________________________ 7 – 46 15/32″ 0.330 16,000 7 – 46V 15/32″ 0.330 16,700 1 – 22 7/32″ 0.080 5,100 CABLE WEAK BREAKING STRAIN POINTS … Logging Cables and Weak Points
The implementation of the wire line logging programme at the well site is carried out by specialist contractors under the supervision of the Drilling Supervisor, although these responsibilities can be delegated to the Rig Drilling Engineer or the Well Site Geologist. The responsibilities of the well site personnel are identified below. The scope of electric … Organisation and Responsibilities during Wireline Operations
Bore Hole Compensated Sonic BHC Bridge Plug Setting BP Calliper CAL Calliper (Thru-Tubing) TTC Cement Bond Logging CBL Variable Density Logging CBL-VD Cement Dump Bailer DB Combination Production Logging PCT Compensated Neutron Log CNL Customer Instrument Service CIS Depth Determination DD Dipmeter (High Resolution) HDT Bore Hole Geometry Tool BGT Dual Induction Laterolog DIL … Acronyms logging tools – Schlumberger
Practical guidelines for wellsite coring operations. Three of the key inputs to formation evaluation for effective reservoir development and management are: Reservoir geological description Log calibration for hydrocarbons in place Input to reserves calculation These inputs all rely on obtaining good quality core. 1 Pre Coring Rigsite Communication and Checks Actions to be performed by … Wellsite Coring Guidelines