MODELING METHOD FOR GAS PRODUCTION OF CBM RESERVOIR ROCKS

The present invention includes (a) dividing the reservoir in a coalbed methane (CBM) development area through computer modeling and thereby forming a three-dimensional grids having a plurality of cell, (b) actually forming drilling holes in the development area and thereby obtaining core samples for...

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Bibliographische Detailangaben
Hauptverfasser:	Kang, Il oh, Kim, Kihong, Seo, Junwoo, Han, Jeong-Min, So, Youngseok
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ELECTRIC DIGITAL DATA PROCESSING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PHYSICS
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Beschreibung
Zusammenfassung:	The present invention includes (a) dividing the reservoir in a coalbed methane (CBM) development area through computer modeling and thereby forming a three-dimensional grids having a plurality of cell, (b) actually forming drilling holes in the development area and thereby obtaining core samples for each depth, (c) modeling the amounts of ash, water, and gas in each of the cells, (d) modeling the pressure change over time in each of the cells under a premise in which a production well is formed in the grids, and (e) performing a Langmuir experiment for the core samples, determining a Langmuir function for a maximum amount of gas adsorption with pressure and amounts of ash and water as variables, and applying the Langmuir function to each of the cells to calculate an amount of gas detected due to pressure change over time.