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Question
Is petroleum system different from play? if they are, could you throw more light on both?
what does quantum of 2D/3D seismic data and vintages covering a field mean?
what is seismic prognosis?
What is geologic prognosis?

Introduction:
I am an intern working in the Nigeria. currently involved in Field Development studies in the Niger Delta. I like the answers you proffer.

Answer
Dear Uche,

1) Is petroleum system different from play? if they are, could you throw more light on both?

Answer) Petroleum system deals with all aspects and processes of hydrocarbon starting from the source to the final entrapment.  You need to see study source rock, reservoir, seal rock and trap whereas processes that involved in hydrocarbon generation also need to be taken into account i.e., are hydrocarbon maturation and generation of the source rock by thermal effect, expulsion and the migration from the source and finally the accumulation into the reservoir which require to be retained there due to effective and competent overlying seal and trap.

Play is generally regarded as a typical reservoir rock or some specific trap type; for example Devonian reefs or rift play or Early Cretaceous marine sandstone.

2) what does quantum of 2D/3D seismic data and vintages covering a field mean?

Answer) This means 2D and 3D seismic data volume over a field whereas vintage means the year when the data was acquired or processed. You may find 2D or 3d seismic data acquired more than one time  or processed on various occasions with different methodology.

3) what is seismic prognosis?
What is geologic prognosis?

Answer) After seismic data interpretation geologist has to prepare several structure maps on the various geological horizons including top of the reservoirs. Based on the seismic interpretation well needs to drilled on the most optimum geological position either through structure maps or by the combination of seismic attribute mapping and structure maps both. Therefore, a geologist will prepare the drilling sequence of each geological formation with depth, lithology and thickness of each formation going to be drilled from the top of the well to the proposed total depth. That program is known as geological prognosis which is derived by the seismic data.

Hope this answer helps you.

regards

tariq hasany  

Geology

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Syed Tariq Hasany

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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

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