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Senin, 21 Januari 2019

PETROLEUM DRILLING OVERVIEW


PETROLEUM DRILLING OVERVIEW

Drilling Oil and Gas Field
We are now already drilling our first wildcat well or maybe development well.  Here in in this article, we'll discussed the fundamentals of drilling in petroleum (oil and gas) well, if all goes for the plan in the next few years will bring a new oilfield into production.

Drilling oil and gas field to production

Petroleum Reservoirs
As we know that we studied how oil was formed how it accumulated and how it was stored in underground reservoirs. With this knowledge, we were then able to go looking for oil in locations that would most likely contain commercial petroleum accumulations, later by applying scientific principles of petroleum reservoir formation. We acquired, processed, and interpreted data from the most interesting locations which then, would allow us to pinpoint exactly where we would drill our first wildcat well.

Petroleum reservoirs

Subsurface Location

Wild Cat Drilling
Even though we know that there is only a one in four chance of finding oil in commercial quantities when drilling with no one has drilled before, we obtain permission from the owners of the land.




Wild cat drilling

Planning, Equipment and Manpower
After we obtain permission of the land, the access has been secured we are ready to initiate the next important step as we get closer and closer to actually going on site. It is during this crucial phase that many decisions about equipment and manpower have to be made


Planning decision equipment and manpower

Then what's on site there are still other additional decisions to make and procedures to follow to ensure safe, efficient drilling throughout the entire process whether we find oil and gas or not.

THE DRILLING PREPARATIONS
 The Rigs Type
In this book we’ll discuss, the preparations needed to erect a functioning appropriate rig on site. We’ll illustrate the types of rigs and their parameters to help you select the one best suited for our particular site and drilling program, next we’ll explain the components and functions of the five main systems of a drilling rig, we’ll present the role of the rig crew and their importance to the overall a successful safe completion of drilling for oil and gas.

Types of rigs and their parameters

Five main systems of drilling rig

Drilling Procedures and Engineering Challenges
After we discus about the Rigs type, we'll highlight some retained drilling procedures and engineering challenges that must be closely monitored during drilling, we’ll conclude by describing new technological advances involved in directional and horizontal drilling and how, they can be used to expand the reach.

Drilling procedures and engineering challenges

Directional and horizontal drilling

Aim, Conditions Location and Drilling Program
To help us get started we must first answer some critical questions about the aims and conditions of our location and drilling program. These choices once made will better enable us to successfully drill in the spot we have selected, for instance what kind of rig we need, that will depend on whether we drill on land or offshore

Choice of the aims and conditions of location and drilling program

Engineers create a well plan and a wellbore design for every well before it is drilled. A typical wellbore architectural diagram for an onshore well is shown in figure 011. The wellbore diagram shows the hole and casing sizes needed to drill the well to its desired depth.

Location Accessibility, Tools and Equipment
If we drill on land then is the location, accessible by local roads or is it in a remote location. Or our tools and equipment suited for the land conditions and whether we will find on location. if we drill over water how deep and how come will the water be while we are drilling, or our tools and equipment suited for the offshore conditions and whether we will find on location, do we expect the oil zone to be near the surface and what is call a shallow well or do we expect the oil zone to be deep what is the estimated depth that we planned to drill to reach the target.

The location - accessible by local roads or a remote location

Tools and equipment suited in Deep water

Others Considerations
There are several Others Considerations such  We’ll the drilling take place in low or high pressure zones?, are there environmental restrictions?, what procedure will we be required to follow to protect water animals air quality what about noise? what are the laws?, how do we ensure that we are in compliance?, without the penalties if we are not, our trained drilling crew and rigged equipment available during our time lines?.

Pressure zones, environmental restrictions, procedure to protect water animals air quality & noise

As you can see from this very limited list of questions that will need to be answered at the very top is the need to select and appropriate rig for the designated location for the specific depth and the environmental conditions.

List of questions to select and appropriate rig


For further read, you may get the book from amazon.

PETROLEUM DRILLING OVERVIEW

https://www.amazon.com/PETROLEUM-DRILLING-OVERVIEW-Andi-Anriansyah/dp/1792194684


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