Measurement Overview

Август 12, 2022

Главная
Разное
Measurement Overview

Содержание

2. PDD Processing Raw pressure transmitted (Annular and Bore as GENERIC Variables – Units PSI Variables Tagged
3. PDD Applications The sleeve with two O rings can be changed at the rig site to
4. PDD Piezo resistive sensor
5. PDD Piezo resistive sensor
6. PDD Applications Real-time downhole hydraulics monitor Real-time ECD monitoring and management Annulus cuttings overload detection Washout
7. Managed Pressure Drilling Managing the annular hydraulic pressure profile within the allowed pressure window Well control
8. Abnormal Pore Pressure Pore Pressure Greater or Less than Hydrostatic Pressure - Rapid Deposition - Lithology
9. Pore Pressure Prediction Seismic Data Log Data Drilling Data
10. Mud Weight & ECD Margins Static Mud Weight and ECD should Control Formation Pressures whilst not
11. Failure to Control Pressure Shale Caving Borehole Rugosity Tight Spots Well Collapse Well Kicks Blow Out
12. ECD – Effective Circulating Density EMW = {PDD Pann (psi) / TVD (m) x 1.421} Mud
14. Скачать презентацию

Слайд 2

PDD Processing
Raw pressure transmitted (Annular and Bore as GENERIC Variables –

Units PSI
Variables Tagged an passed via WITS to RMS offline PC which calculates ECD / and other drilling parameters
RMS offline computer sends all WITS and corrected data to Digidrill PC for plotting and LAS file generation
Digidrill PC plots and stores data as function of depth and time.
PDD memory data processed through Digidrill correlator for depth time correlation and LAS file generation.

Слайд 3

PDD Applications
The sleeve with two O rings can be changed at

the rig site to accommodate different collar ID’S. The section between the two O rings sees anulus pressure through a hole in the sub wall. A further hole through the sleeve exposes the pressure transducers to annular pressure

The sleeve below shows the hole through to the body that holds the pressure transducers.

Слайд 4

PDD Piezo resistive sensor

Слайд 5

PDD Piezo resistive sensor

Слайд 6

PDD Applications
Real-time downhole hydraulics monitor
Real-time ECD monitoring and management
Annulus cuttings overload

detection
Washout detection
Kick monitoring and control
Lost circulation detection
Mud motor performance and control
Mud rheology control
Optimisation of hole cleaning
Formation fracture / loss limitation
Air and underbalanced drilling well control
Nitrogen / Air mix control
MSE measurement optimisation for Formation Evaluation

Слайд 7

Managed Pressure Drilling
Managing the annular hydraulic pressure profile within the allowed

pressure window
Well control within this window
Assistance from modelling tools and automated control systems
MPD may be accomplished by many means including
- Backpressure
- Variable fluid density
- Fluid rheology
- Circulation friction
- Hole geometry
- Using an active device to manipulate the mud gradient and dynamic pressure
Aims of MPD
Control Abnormal Pressures
- Borehole Quality (Sloughing or Collapse)
- Blow out prevention
Stay within Fracture Gradient
- Ensure Casing Shoe Integrity
- Limit or Stop Lost Circulation
Restrict or Eliminate Reservoir Damage
- Prevent Mud / Mud Solids Entering Reservoir Porosity
- Maximise Production Potential

Слайд 8

Abnormal Pore Pressure
Pore Pressure Greater or Less than Hydrostatic Pressure
- Rapid

Deposition
- Lithology Seal
- Fault Seal
- Depleted Pay Zone

Слайд 9

Pore Pressure Prediction
Seismic Data
Log Data
Drilling Data

Слайд 10

Mud Weight & ECD Margins
Static Mud Weight and ECD should Control

Formation Pressures whilst not approaching Fracture pressure (at last casing shoe)

Слайд 11

Failure to Control Pressure
Shale Caving
Borehole Rugosity
Tight Spots
Well Collapse
Well Kicks
Blow Out
Lost Circulation
Reservoir

Damage

Слайд 12

ECD – Effective Circulating Density
EMW = {PDD Pann (psi) / TVD

(m) x 1.421}

Mud Weight + Annular Friction Losses
Higher RPM (~>50) increases Annular Friction Losses
Starting Rotation increases ECD
- Disturbed cuttings beds
- Start slowly and circulate clean
Temperature affects can decrease EMW
Surge pressures when reaming increase EMW below bit and around BHA
- Can Cause losses
Swab pressures when back reaming decrease EMW below bit and around BHA
- Can cause Kick, connection gas, etc.

Measurement Overview

Содержание

PDD ProcessingRaw pressure transmitted (Annular and Bore as GENERIC Variables –

PDD ApplicationsThe sleeve with two O rings can be changed at

PDD Piezo resistive sensor

PDD Piezo resistive sensor

PDD ApplicationsReal-time downhole hydraulics monitorReal-time ECD monitoring and managementAnnulus cuttings overload

Managed Pressure DrillingManaging the annular hydraulic pressure profile within the allowed

Abnormal Pore PressurePore Pressure Greater or Less than Hydrostatic Pressure - Rapid

Pore Pressure PredictionSeismic DataLog DataDrilling Data

Mud Weight & ECD MarginsStatic Mud Weight and ECD should Control

Failure to Control PressureShale CavingBorehole RugosityTight SpotsWell CollapseWell KicksBlow OutLost CirculationReservoir

ECD – Effective Circulating DensityEMW = {PDD Pann (psi) / TVD

Похожие презентации

PDD Processing
Raw pressure transmitted (Annular and Bore as GENERIC Variables –

PDD Applications
The sleeve with two O rings can be changed at

PDD Applications
Real-time downhole hydraulics monitor
Real-time ECD monitoring and management
Annulus cuttings overload

Managed Pressure Drilling
Managing the annular hydraulic pressure profile within the allowed

Abnormal Pore Pressure
Pore Pressure Greater or Less than Hydrostatic Pressure
- Rapid

Pore Pressure Prediction
Seismic Data
Log Data
Drilling Data

Mud Weight & ECD Margins
Static Mud Weight and ECD should Control

Failure to Control Pressure
Shale Caving
Borehole Rugosity
Tight Spots
Well Collapse
Well Kicks
Blow Out
Lost Circulation
Reservoir

ECD – Effective Circulating Density
EMW = {PDD Pann (psi) / TVD