Lecture 1 - Drilling

8/2/2019 Lecture 1 - Drilling

1/16

Introduction toChemical Engineering and

Petroleum Engineering

Drilling

Dr. Julie D. Bell RPG, PhD

[email protected]


2/16

Drilling Preliminaries

The Mechanics

The Problems Techniques

Testing a well

Completing

Surface Treatment and Storage

Offshore drilling and completion

Workover

These lectures are based on Petroleum Geology, Exploration,Drilling and Production 2ndEdition by Norman J. Hyne


3/16

A geologist, geophysicist and/or engineer willlocate the wellsite. Drilling targets areidentified.

Wellsite is a location to drill and possibly findcommercial oil and gas

Drilling target is a potential reservoir.

The average depth a well is drilled in the US is

5080 ft or 1549 m


4/16

LSBU students at a Wellsite


5/16

Types of wells - exploratory

Wildcat or controlled exploratory well a well

drilled to discover new oil or gas reserves

The exploratory well can be drilled to

Test a trap that has never produced (new-field wildcat)

Test a reservoir that has never produced in a known field

that is deeper or shallower than producing reservoirs

Extend the known limits of a producing reservoir in a

field. A (rank wildcat) is drilled at least 2 miles/3 kms

away from any known production.


6/16

Types of wells - discovery

Discovery well a well that locates a new

petroleum deposit, either a new field or a new

reservoir.

Appraisal well a well drilled out from the side of a

discovery well to determine the area of a new field.

If the oil-water or gas-water contact can be located on all

four sides of the discovery well, the area of the field canbe determined.


7/16

Types of wells - production

Developmental wells a well drilled in theknown extent of a field.

Infill wells well drilled between producing

wells in an established field to increase theproduction rate.

Injection well a well used to pump fluids

down into producing reservoirs for pressuremainenance, waterflood or enhanced oilrecovery


8/16

DRILLINGDrilling Preliminaries

Important parts of preliminaries consist of

Land and Leasing

PrivateGovernment controlled

Contracts Authority for expenditure

Joint operating agreements and supportagreements Site preparation


9/16

DRILLING

The Mechanics Almost all wells are drilled with rotary

drilling rigs which rotates a long length ofsteel pipe with a bit on the end of it to cutthe wellbore.

The rotary rig consists of four majorsystems including the power

hoisting

rotatingcirculating systems


10/16

DRILLING

The Problems


11/16

DRILLING

Techniques


12/16

DRILLING

Testing a well


13/16

DRILLING

Completing


14/16

DRILLING

Surface Treatment and Storage


15/16

DRILLING

Offshore drilling and completion


16/16

DRILLING

Workover

Lecture 1 - Drilling

Documents

Transcript of Lecture 1 - Drilling