Practical Well Planning and Drilling ManualFull description
L6-DD Fundamentals and Directional WellFull description
Practical Well Planning and Drilling Manual
Describir todos los aspectos Operacionales y de Ingeniería, que son necesarios para la Planificación de un Programa de Perforación, (Well Planning), así como los requerimientos para la …Descripción completa
• Did geological study of the Jaisalmer Basin, Western Rajasthan. • Learnt about basic processes undertaken for drilling, production, logging and reservoir operations. • Got acquainted wit…Full description
Practical Well Planning and Drilling ManualFull description
Descripción: Una revisión de sus principios y su puesta en práctica
A manual on compassFull description
well
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pembahasan mengenai uji suur T-004Deskripsi lengkap
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Well control adalah usaha untuk menjaga kestabilan lubang bor saat proses pemboran
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very useful to student which studying well testFull description
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Well Planning
Schlumberger
Anadrill Sugar Land Learning Center - SLC
Anadrill
1
Mapping The Reservoir l l l l
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Establish the boundaries of the reservoir. Seismic Surveying - most common method. Sound waves are reflected from subsurface layers. Some of the sound waves energy is absorbed by fluids. The sysmic measurement relative to time and depth is inferred Correlated to offset well logs. Can only be verified by actually drilling the well!
Schlumberger
Anadrill Sugar Land Learning Center - SLC
Anadrill
2
Placement of the Rig - General Determined By Things such as: l l l l l
Surface features Leases & Boundaries Existing facilities (such as production facilities) Natural & man-made obstacles Multiple targets (necessary to drill a directional well from an offset surface location)
Schlumberger
Anadrill Sugar Land Learning Center - SLC
Anadrill
There are many variables that must be accounted for when choosing a surface location. For example, the Wytch Farm project involved drilling offshore from a land location to help cut costs and speed up the first oil returns. How did it do that?????
3
Leases & Boundaries Leases normally have clearly defined boundaries. Any point within a lease can usually be l defined in terms of distance from any two adjoining boundaries. Lines are surveyed along the irregular l edges of the property using the azimuth and length of the lines. An example would be: l
• 300.6' from the S43.8W line • 248.8' from the N50.2W line.
Schlumberger
Anadrill Sugar Land Learning Center - SLC
Anadrill
Leases and blocks are usually defined in the legal coordinate system. Within the next 3 to 5 years, all wells in the world will be located or relocated in some legal coordinate system.
4
Placement of the Rig - Offshore l
The main difference between locations on land and offshore is the number and proximity of wellbores.
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Offshore platforms tend to have between 6 and 60 wells. Adjacent wells may have only 6' feet between their centers.
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Many factors including water depth, bottom slope, sandy bottom versus coral reef, local currents, etc.., interact to control the selection of the offshore site.
Schlumberger
Anadrill Sugar Land Learning Center - SLC
Anadrill
Offshore could have logistical problems such as supplies in bad weather, etc.
5
Designing a Well - Reservoir Characteristics The types of wells planned for a reservoir are determined by: l l l l l l
Schlumberger
The production plan for the reservoir. The thickness of the targets. The size of the targets. The shape of the targets. The production plan of that particular well. The projected borehole stability considering the desired well plan and subsequent angle.
Anadrill Sugar Land Learning Center - SLC
Anadrill
The production plan will include things such as: The best way to drain the reservoir. The types of production liners which will be used. The use of downhole pumping equipment if necessary.
6
Designing a Well - Drilling Considerations When planning a well the client will consider things such as: l l l
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The types of drilling rigs available. The target depths. The expected hole sizes of the various phases of the well. The expected casing points and concerns. The mud program. The design of the BHAs. The budget.
Schlumberger
Anadrill Sugar Land Learning Center - SLC
Anadrill
7
Designing a Well - The Anadrill DPC l l l l l l l
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Assembles all necessary information. Calculates torque and drag. Determines expected kick-off point. Calculates target azimuth. Has knowledge of build rates in area. Finalizes BHAs. Plans the well trajectory keeping in mind existing wells (anti-collision).. Plots the actual “Well Plan” on paper.
Schlumberger
Anadrill Sugar Land Learning Center - SLC
Anadrill
8
Well Planning Terminology
Schlumberger
Anadrill Sugar Land Learning Center - SLC
Anadrill
9
Grid Systems Two Common Projection Models: l
UTM Grid System • Divides world into 60 equal longitudinal zones • Each zone is 6 deg wide • Distortion increases toward the north
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Lambert Conformal Conic Projection • Parallels of latitude that are unequally spaced arcs of concentric circles • Distortion increases toward the edges
Schlumberger
Anadrill Sugar Land Learning Center - SLC
Anadrill
The grid system in use will be defined by the client. All we need is the correction to input into the inits. For more information on the grid system, see the D&I Training Manual. The well is planned using one of the projections. The surveys we take must be corrected to the same system used to plan the well.
10
Horizontal Displacement Ta rg e t
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LATITUDE = TOTAL DISTANCE NORTH FOR EACH SURVEY STATION DEPARTURE = TOTAL DISTANCE EAST FOR EACH SURVEY STATION NEGATIVE NUMBERS ARE FOR SOUTH OR WEST RESPECTIVELY
De parture
e d u t i t a L
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C l o s u r e
m ce la p is
t en
on ti eS c al ic re t V
Surface Reference Point
Schlumberger
Anadrill Sugar Land Learning Center - SLC
Anadrill
The line to the target is defined by the azimuth from rotary table to target init in the tie-in-point.
VERTICAL SECTION IS THE PROJECTION OF THE SURVEY STATION ONTO THE PLANE OF PROPOSAL
e d u t i t a
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la p is D
C l o s u r e
m ce
t en
on ti ec lS ca tr i e V
Surface Reference Point
Schlumberger
Anadrill Sugar Land Learning Center - SLC
Anadrill
14
Plane of Proposal PURPOSE FOR CALCULATING VERTICAL SECTION: l
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Project well onto Plane of Proposal Plot progress of well on the Well Plan.
Departure
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is D
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e
C l o s u r e
n e m
Target
t
a c tr i e V
c e S l
o ti
n
PLANE OF PROPOSAL
Schlumberger
Anadrill Sugar Land Learning Center - SLC
Anadrill
The vertical section is used in the planning stages. We calculate it in order to plot the progress of the well on the wall plot. Therefore, it is imperative that the same azimuth from rotary table to target used in the planning is used while drilling.