Larwin:


smile, if you check my thread here...https://www.nairaland.com/3236298/know-geophysical-investigation-borehole-drilling
i tried to talk about costing. Most times people take up a job at a price that are way too low...this is due to competition, we ve lot of drilling coy flooding the street and also hunger

thank God you went ahead to do market survey yrsef and you see the amount dey r demanding is nt enough for the project.

well, what they do to cut cost are in various ways.
1) they dont drill the required depth...
2) they buy sophisticated materials....like pvc, pumps so in the end,, dey ll still see small change.

where is d location for d project

sonnie10:


Actually, I am prospective customer. The reason I searched for more information on borehole is due to the quote I got from some guys for drilling around that area. It was ridiculously cheap that I became suspicious. They said $700k total ( labor and all materials included)

Based on the dept in the chart I posted; about 200meters, they will need up to 55 pics of those 12ft pipes. When I checked, each pipe cost #10K. That is #550k already.

We have not even added the cost of sump, tank and Labour.

So, I called someone else and he said it wasn't possible for that price. But to my surprise, a neighbor just did his for #700k. My question is, how do they cut cost?

sonnie10:


Orlu axis

Larwin:


sir, we do incorporate this to complement our geophysical survey, especially wen u cudnt spread enuf due to obstruction while doing d routine resistivity survey....what we do is to look for lets say an abandoned hole in the area and we send sonde inside.

this will help us know each formation type and thicknesses and so we can design the drilling plan...

Larwin:


smile, u r oil driller sir...u cant possibly compare yr tech with wat we water drillers use.....In Nigeria today, dere is no company dat can boast of drilling 300m in sedimentary within an hr, if the company is here..let him com out, i have a project waiting for the coy!

i am nt disputing u nt experiencing loss of circulation in faulted shales, that's the norm. how do u guys combat this in the oil industry? u mind sharing the experience??

Mrbigman1:


What do dey need d pipe for? Is it a drilling pipe or casing?

If dey re into d business, the only expenses dey will encounter is buying drilling mud and casing pipe.
Dey should have all other equipments. Mind u, dey retrieve dem after drilling not like dey sink it.
Dey case with pvc and cement. Den complete.

Mrbigman1:


Increase mud weight. But first, u circulate very heavy mud (pill) to block off, if it dnt, u increase mud weight. Dis comes with its own disadvantage, d weight and d pressure used in circulating it might cause further damage, and it may block off pores in sandstones required for production. So, dey always slow down, or stop drilling and watch on tank to check if it will happen on a stable well, if it happens, den Dia is danger, if it dnt, dey can go down gradually and increase weight of mud. If it cures, dey go back to normal weight or density.

Every project has a program set down already.

rusher14:


The sonde is part of the well logging equipment and could be anything from resistivity probe to sonic (rarely used in water wells).

The other gadget is simply a preliminary tool for noting the water level in a well such as one you do not have prior knowledge of or one whose recovery rate you were trying to determine.

The rate at which the well is replenished can be determined over time if you knew the water depth at every given time.

Larwin:


sir, we do incorporate this to complement our geophysical survey, especially wen u cudnt spread enuf due to obstruction while doing d routine resistivity survey....what we do is to look for lets say an abandoned hole in the area and we send sonde inside.

this will help us know each formation type and thicknesses and so we can design the drilling plan...

sonnie10:


The casing with PVC is the problem, especially at that dept.

Larwin:


yea, thats what we do in water industry too...increasing the mud weight cud lead to caving in or collapsing of the formation. we also do introduce saw dust with the drilling mud so as to seal the pores. another means is to introduce air at zero pressure to drill pass that formation depending on the formation sha.

Mrbigman1:


Is d sounder designed to pick layers?

I don miss geology oh and it's fvcking assumptions.

U get sleepless nights and assume heaven and earth, in d morning supervisor calls u a idiot. U go back to site, gride and get same readings again, d main idiot says goan remove noise.
Nigerian lectures are trained to depress Dia students.
We dnt see anything good in anyone.

Mrbigman1:


Wow!
Nice innovation.
How do u do d air and d zero pressure?

And do u recycle mud? Or it just waste on coming to surface?

sonnie10:


The casing with PVC is the problem, especially at that dept.

Larwin:


lols, the sonde has gamma rays dat distinguish sand from shale.
dnt mind doz lecturers, dey dnt know dat field experience is totally different from classroom

Larwin:


u just put the pressure at zero bar, at dat level, it ll still be efficient to bring cutting up. the mud are always recycled, u dnt expect it to be disposed off na....

Mrbigman1:


Wia ve u used these equipments? I am sure not in Nigeria for borehole drilling.

Mrbigman1:


But rusher say the sounder dnt ve radioactive source. Make un dey careful with una preek oh! Lol.

Do u probe an open hole or just place on d floor and send down signal?

rusher14:
In addition, geophysical equipment such as ABEM terrameter from Atlas Copco, well logging equipment, as well as electromagnetic equipment for VLF measurements (Ronka Geonics used to be popular) could be quite useful.

Pump testing equipment, water level sounder and of course, interpretative software could make the your life easier in achieving your aim of precision and quick delivery.

onyeogalu1:



Do you have these equipments you mentioned above for sale?

rusher14:


No I don't.