We would love to hear your thoughts about our site and services, please take our survey here.
London South East prides itself on its community spirit, and in order to keep the chat section problem free, we ask all members to follow these simple rules. In these rules, we refer to ourselves as "we", "us", "our". The user of the website is referred to as "you" and "your".
By posting on our share chat boards you are agreeing to the following:
The IP address of all posts is recorded to aid in enforcing these conditions. As a user you agree to any information you have entered being stored in a database. You agree that we have the right to remove, edit, move or close any topic or board at any time should we see fit. You agree that we have the right to remove any post without notice. You agree that we have the right to suspend your account without notice.
Please note some users may not behave properly and may post content that is misleading, untrue or offensive.
It is not possible for us to fully monitor all content all of the time but where we have actually received notice of any content that is potentially misleading, untrue, offensive, unlawful, infringes third party rights or is potentially in breach of these terms and conditions, then we will review such content, decide whether to remove it from this website and act accordingly.
Premium Members are members that have a premium subscription with London South East. You can subscribe here.
London South East does not endorse such members, and posts should not be construed as advice and represent the opinions of the authors, not those of London South East Ltd, or its affiliates.
Thanks Mr Pose.
bigsmoke
Much better to provide diagrams and our structural traps are the fault type, but the OWC principle is easier to explain on the anticline type as the diagrams always plonk the oil, like a wide brimmed hat, on the source rock: slide 11 on your link is the standard example.
On your faulted diagram on slide 15, both wells will find the OWC if they drill straight down to the source rock, as they are both above reservoir rock that contain water below the oil (unlike Indico)
If the oil layer was twice as thick as that shown, then neither rig would find the OWC (the Indico case) and both would need to move to the left, down dip, to find the water.
In practical terms, until the OWC is found, accurate reserves cannot be calculated: currently, for the 3P reserves of 33MMBO, they have estimated that the Indico OWC is 40 feet below the LKO ie the point at which they encountered the basement on this first drill. They obviously went for the top of the structure to make sure that they did not miss the oil.
from the investor prez are we not thinking we are a faulty trap?
try page 15 of this set of slides https://www.slideshare.net/HamasUlGhani1/structural-traps in that diagram the left hand well could drill into oil and then rock. is it the case that "up dip" means the left hand well is moving left (up the dip) to try and find the OWC. then we can measure the depth of the oil found?
In layman's terms, think of a mole hill, with the layers of rock following the outline.
The paleozoic zone is higher at the center of the mole hill and so there is the possibility that it sticks right up into the oil bearing part of the reservoir rock and so there is no water between the paleozoic zone and the oil.
It is possible that the reservoir rock contains no water, in which case, even away from the center (down dip) there is no OWC. More normally, oil and water are both found in the reservoir rock (light oil floats on water), so as drilling moves away from the center (with the reservoir rock sloping downhill) eventually the drill bit finds the horizontal water level in the reservoir rock under the oil, also in the reservoir rock..
It needs diagrams to explain: search for Structural Traps (the mole hill analogy is the anticline type). Obviously it all gets more complicated with combination traps.
I’m slightly confused that Indico 1 found no water in the LS3 but then they also drilled through the LS3 into the paleozioc zone. Where are they expecting to find water if at all and was there a mistake in the original drilling?