You are here:

Geology/Coring Point / Supervision

Advertisement


Question
QUESTION: dear sir,
        How Coring Point is select exploratory well ? and Geologist ask to supervise the Coring Operation onsite .
what is the silent feature that well-site Geologist is look and Note in Coring supervision.?

Regard:
waqar

ANSWER: Dear Waqar,

Thanks for sending me your question.

The coring is an import process to get geological information about the drilled rock, either source rock or reservoir rock but generally, core happens to be in a reservoir and rarely in a source rock or a seal rock. The core point selection while drilling is the part of the well geological prognosis and the company geologist and geophysicist have to clearly define the objective of the core, the interval and depth and method to preserve after core comes to the surface.

Nearing the core point depth, wellsite geologist needs to be extra vigilant and sees the sample on shorter interval than usual and takes the help of LWD readings and smartly correlates ROP and lithology with nearby wells to ensure that required core point should not be missed.

Once core point is confirmed, core barrel to be run in hole while wellsite geologist needs to monitor lithology (usually very little volumes of cuttings come out but whatever comes out must be looked at and log should be prepared), ROP, gases and oil shows. Once core reaches to the surface Wellsite geologists take the chip of the core on any given interval (usually on every half meter or every foot) to examine and prepare core log.

A geologist is also responsible  monitoring  the proper labeling of the core with depth and boxes of core storage should be marked with well name and coring depth prior to transporting to the core analysis company or drilling warehouse. All documentation regarding core transportation should be correctly done, wich is usually a standard document of all operating companies


Hope this answer helps.

Regards

Tariq


---------- FOLLOW-UP ----------

QUESTION: Which Fm or lithology is Suitable for coring and which are not ?


regard:
waqar

Answer
Dear Waqar,

Unconsolitaed and highly fractured rocks are difficult to be preserved in cores whereas consolidated and moderate  density rocks can be better preserved. Highly dense and hard rocks are time-consuming and expensive coring operation.

Hope, this may help

Geology

All Answers


Answers by Expert:


Ask Experts

Volunteer


Syed Tariq Hasany

Expertise

MY HUMBLE REQUEST. BEFORE SENDING A QUESTION PLEASE READ THE FOLLOWING CAREFULY. ANSWERING ONLY PUBLIC QUESTIONS. Ask questions of exploration of Petroleum, and specific regions for specific answers about Pakistan, Central Asia, Middle East and Far East. Ask questions of Business side of the petroleum Geology. Love to guide students and also Career related issues PRIVATE QUESTIONS on thasany@yahoo.com I am not expert of Hard rocks (Igneous and metamorphic rocks)Volcanic activity and related petrology, mineralogy and its exploration. BE SPECIFOC WHAT YOU WANT TO KNOW AND ASK WITH DIGNITY AND RESPECT. Show me your determination and commitment to learn. PLEASE TRY TO WRITE RIGHT, PROPER AND CORRECT LANGUAGE. DO NOT USE TEXT(SMS)STYLE. Thanks TARIQ

Experience

Petroleum Exploration

Organizations
Petronas Carigali Sdn Bhd

Publications
In Pakistani and Asian Petroleum Confertence special Publications

Education/Credentials
BSc Honours in Geology and Master of Science degree in Petroleum Geology

Awards and Honors
Active member AAPG, SPE and PAPG Treasurer PAPG and AAPG Visiting Geoscientist

©2016 About.com. All rights reserved.