GKYM Üretimi ve CO2 Depolanmasının Sayısal İncelenmesi

Öz

Enerji kaynaklarının azalmasıyla eşzamanlı artan talebi karşılamak için, konvansiyonel olmayan kaynakların ekonomik ve önemli miktarlarda üretilebilmesi, kapsamlı araştırmalara gerek duyulmasına sebep olmuştur. Bu çalışmada kömür yatağı metanı (KYM) üretiminin geliştirilmesi üzerine odaklanılmıştır. KYM ve CO2-GKYM (geliştirilmiş kömür yatağı metanı) üretiminde yer alan mekanizmaları tartışmayı ve CMG-GEM simülasyon programı yardımıyla, KYM'den en iyi üretim yöntemi ile en fazla CO2 (karbondioksit) depolamasını sağlamak için farklı kuyu konfigürasyonlarından yararlanılmıştır. Nijerya, Enugu'daki Onyeama kömür yatağı sahasının özellikleri ile oluşturulan simülasyon modelinde, on değişik senaryo kullanılarak CH4 (metan) üretimi ve CO2 depolaması uygulanmıştır. Bu senaryoların her biri, üretim ve enjeksiyon kuyuları için farklı düzenlemelere ve sayılara sahip olduğundan farklı sonuçlar elde edilmiştir. Simülasyonlardan, büyük hacimlerde CO2’i depolarken çok fazla metan üretmenin mümkün olduğu görülmüştür. Onuncu senaryonun üretim ve enjeksiyon kuyuları hem depolama hem de üretim açısından en iyi performansı gösterdiği görülmüştür.

Anahtar Kelimeler

• KYM
• GKYM
• CO2 Depolaması
• CMG GEM

Numerical Investigation of ECBM Recovery and CO2 Sequestration

Abstract

Depleting amounts of conventional resources with simultaneous increasing energy demand necessitates a thorough look into these unconventional resources in an effort to produce them economically and in considerable amounts. In an attempt at finding ways to deploy properly unconventional resources, this study is focused on the development of coal bed methane (CBM). The goal is to discuss the mechanisms involved in CBM and CO2-ECBM (enhanced coal bed methane) production and by performing simulations using CMG-GEM, compare the results from both of these to find the best method of producing from CBM as well as finding out the best well orientation/configuration. The characteristics of the Onyeama coalbed field in Enugu, Nigeria was used to create ten cases to make these comparisons. Each of these cases had different arrangements and numbers for the producer and injector wells and therefore had different results. It was seen from the simulation that it is possible to produce enormous amount of methane (CH4) while sequestering large volumes of carbondioxide (CO2). Analysing the amount of methane that could be produced and the amount of carbon that could be sequestered showed that the tenth case performed best in term of both sequestration and production.

Keywords

• CBM
• ECBM
• CO2 Sequestration
• CMG GEM

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