Cuttings Measurement Guidelines.docx

CUTTINGS WEIGHING PROCEDURES AND REPORTING FOR WEST DESARU DRILLING CAMPAIGN 2017 Systematically sample the drill cuttings return rate at the shale shakers, and use the data and trends, along with torque & drag and ECD, to implement timely changes to drilling parameters and/or hole cleaning practices in order to avoid problems caused by excessive drill cuttings build-up in the well bore. Procedure: 1.

A drilled cuttings sample will be caught and weighed every 30 minutes while drilling and every 15 minutes while circulating (prior to wiper tripping or POOH). The mud logger will coordinate the timing with the sample catcher and the mud logger will record the drilling parameters and pertinent data in the Drilled Cuttings Measurement (DCM) Log Spreadsheet .

2.

The drilled cuttings will be collected and weigh from a single shale shaker using a cutting sampling tray suspended from a scale, and positioned at the shaker discharge. The relative flow rate across the sample shaker and the shaker deck angle should be kept as consistent as possible to ensure meaningful measurement. Avoid sampling just before, during, or immediately after connections.

3.

The shaker hand shall catch the drilled cuttings for one minute using the cutting weigher tray (fabricated & installed recently on UMW Naga 5) and will pass this information to the Mud Logger who will record it in the Cuttings Out Of Hole Monitoring Sheet (DCM). The cuttings out of hole value will be automatically calculated in the log once the time and weight of the sample are entered.

Note: cuttings out of hole can also be measured for 30 seconds, however the weight must be times by 2 to align with 1 minutes cuttings weight.

Sample of Cutting Weigher Tray

4.

Record the Drilled Cuttings in kg/min, and display the data on a time log (Use actual bit depth, Lag Depth is not necessary). Also, to assist in data analysis, the mud logger should include his comments, as well as input from the mud engineer, relative to changes in drilling parameters, formation changes, cuttings characteristics, shaker screen changes, sweeps, etc. on the DCM spreadsheet.

5.

The DCM is set-up such that it will automatically plot and graph the actual and theoretical drilled cutting values (in MT) and other pertinent data, and the mud logger should report any noticeable trends on the DCM Graph to the rig supervisor immediately.

6.

Repeat steps 1 through 5 on a consistent basis while drilling. In addition, when circulating sweeps (if sweeps are used) , the shaker man, with instruction from the driller and/or the mud engineer, should catch a sample just before, during, and after the sweep to assist in monitoring sweep effectiveness.

Roles and Responsibilities: Drilling Fluids Supervisor     

Ensure the drilled cuttings weighing procedures are performed regularly while drilling Review and discuss the DCM and Graph routinely with the mud logger, the driller, and the mud engineer Report drilled cuttings measurement (in KG/min) values on the daily drilling report Provide key learning's feedback to the drilling engineer. Ensure that materials are available for an adequate back-up of cuttings sampling trays, scales, and associated hardware for all rigs

Drilling Engineer   

Review and analyze the DCM Logs and Graphs daily, and make recommendations as deemed necessary Provide continued assessment of the procedures, data quality, reporting, and the overall effectiveness of the cuttings weighing process Recommend changes and improvements as necessary to refine the cuttings weighing process

Mud Engineer      

Oversee the cuttings sample weighing process to ensure that procedures are being followed Ensure that the DCM Log and Graph is being filled-in accurately, completely, and in a timely manner. Provide input to the mud logger as to the physical description of the cuttings in each sample. Descriptions such as large, small, fine, ground-up, soft, mushy, hard, rounded, angular, etc., will assist in hole cleaning analysis. Review the DCM Log and Graph routinely and discuss with the driller and the rig supervisor, making recommendations as necessary wrt mud rheology, etc Provide continued assessment of the procedures, data quality, reporting, and the overall effectiveness of the cuttings weighing process Recommend changes and improvements as necessary to refine the cuttings weighing process

Mud Logger     

Maintain the DCM Log and Graph Coordinate with the sample driller so that the driller can instruct the shaker man when he should catch and weigh a cuttings sample Record data on DCM Log including drilling parameters, drilled cuttings descriptions, lithology, MW and comments Notify the rig supervisor routinely of the DCM values, and immediately if there are any noticeable trends on the DCM Graph Provide an electronic copy of the DCM Log and Graph to the mud engineer and drilling engineer daily to be submitted with daily mud reports

Shaker Man    

Conduct or participate in a JSA for cuttings weighing with the Driller and the Assistant Driller at the beginning of each tour Catch and weigh cuttings samples using cuttings sampling trays and scales on the rig Inform the mud logger of sample weight (kilogram/min) and time (minutes and seconds) to catch the sample (typically one minute) Remove the cuttings sampling tray away from the shaker after sampling, and clean and store appropriately