gas hydrate - CCOP

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The organic geochemistry research group in GSJ/AIST is in charge of the geochemical monitoring of soil gas from in the vicinity of the injection well (IW-1) in order to test for the possible leakage of injected CO 2 . Also, a major topic for the research is geochemical monitoring of the behavior of CO 2 behavior in the coal seam. This has been undertaken so that the time for injected CO 2 to reach to PW-1 could be detected by measurements of CBM composition and 13 C carbon isotopes. Figure 3. Concept of the CO 2 Sequestration Test at Yubari GEOCHEMICAL MONITORING OF SOIL GAS The analyzed soil gas samples were collected from seven locality points. Four points (G-3, G- 3-1, G-3-2, G-3-3) were located at less than 50 m from IW-1, another three (G-1, G-2, G-4) were situated several hundreds of metres distant (Figure 4). G-1 G-2 G-3 IW-1 G-3-1 G-3-2 G-4 PW-1 G-3-3 Figure 4. Soil Gas and CBM Sampling Point at Test Site New Energy Resources in the CCOP Region - Gas Hydrates and Coalbed Methane 153
Soil gas analyses were as follows: • Gas composition: hydrocarbons (C1-C5), Ar, N2, O 2 , CO 2 , H 2 and He • Isotope analysis: 13 C carbon isotope ratio(δ 13 C) of CO 2 and CH 4 Results of analyses indicate that: • In the samples of 06/04/18 and 06/ 5/24, CO2 contents of G3 and G-3-3 exceed 1%, but others are less. • In the samples of 06/07/14 and 06/9/12, G-3-3 is still has a high CO 2 content, but G-3 has decreased to less 1%. • CO 2 content of G-2 increased to over 1%. • There is no relationship between CO 2 contents and 13 C values in the samples with CO 2 contents exceeding 1%. • Hydrocarbon contents are 10 ppm in all samples. There are two possible causes of the high CO 2 contents as indicated in Figure 5. Figure 5. Concept for the reasons for high CO 2 content The method of clarifying which of those two possibilities is most likely is by measuring the relative abundance ratios of N 2 , Ar, and O 2 which major elements of air. Figure 6 shows the Ar, O 2 and N 2 contents versus N2 contents and includes dashed lines that show the ratios in air. All samples are plotted on the air ratio line for N 2 and Ar and most samples are close to the line for N 2 and O 2 , but several samples fall off the latter ratio line. Samples off the line are the same as those with high CO 2 contents, so it is inferred that O 2 is consumed in generation of CO 2 during the decomposition of organic matter by the activity microorganisms. The high correlation coefficient between the O 2 and CO 2 contents support this inference (Figure 7). 154 New Energy Resources in the CCOP Region - Gas Hydrates and Coalbed Methane
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Coordinating Committee for Geoscien
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Thematic Session on New Energy Reso
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CONTENTS Page OPENING REMARKS……
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OPENING REMARKS by Chen Shik Pei Di
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WELCOME ADDRESS by Tai-Sup Lee Pres
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WELCOME ADDRESS by Keun-Pil Park Di
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CONGRATULATORY ADDRESS by David Pri
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PART I GAS HYDRATE: EXPLORATION, RE
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Partial differential equations for
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RESULTS AND DISCUSSION In the follo
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REFERENCES Berner R. A. (1980) Earl
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features of the seabed than those o
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secure the stability of the solutio
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trends depending on the following f
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Organic carbon in sediments is of i
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Sedimentological and Geochemical As
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Figure 3. Sedimentation rate of the
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Marine Gas Hydrate off W. Canada an
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Several methods for computing the Q
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0.035 0.03 Amplitude 0.025 0.02 0.0
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60 50 Amplitude 40 30 20 10 0 0 50
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REFERENCES Dallimore, S.R. and T.S.
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Frequency % 20 16 12 8 HAMA #5, MV=
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Figure 3. Experimental procedures f
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Figure 7 shows two cases of the com
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Seismic Characteristics of Gas Hydr
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Purpose The purpose of this paper i
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The dissociation zone created by th
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hydrate that forms near the wellbor
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dissociation, composite thermal con
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Figure 9. The Advanced Light Source
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Experimental Studies and Developmen
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Natural gas hydrate exploitation an
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Natural gas Free gas layer Figure 5
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Figure 7. One-dimensional developme
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Temper at ur e 2 1 0 -1 -2 -3 -4
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From the above discussion, the heat
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INTRODUCTION Clathrate hydrates are
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MATHEMATICAL MODEL The mathematical
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Where the hydrate-aqueous radius of
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REFERENCES Brooks, R.H., and A.T. C
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86 New Energy Resources in the CCOP
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In this paper, an overview of the M
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The brief tasks in the Phase I are:
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In "Development of the dissociation
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Figure 5. Preparation equipment. AN
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Other recent research subjects in t
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same crystalline structure directly
Page 98 and 99: Another important aspect of the pre
Page 100 and 101: a + CO 2 CH 4 C 2 H 6 b CH 4 in sII
Page 102 and 103: REFERENCES Collett, T.S. and Kuuskr
Page 104 and 105: Figure 1. Physiographic and crust m
Page 106 and 107: Figure 3. Seismic profile showing s
Page 108 and 109: Figure 7. Distribution of echo char
Page 110 and 111: Figure 10. Seismic profile and its
Page 112 and 113: In the early stage of back-arc open
Page 114 and 115: PART II COALBED METHANE (CBM)
Page 116 and 117: Supply and demand infrastructure of
Page 118 and 119: Amisan, Jogyeri, Baegunsa, and Seon
Page 120 and 121: PROPERTIES OF ANTHRACITE The coals
Page 122 and 123: Table 4. Average chemical compositi
Page 124 and 125: CONCLUSIONS 1. Most of the coals em
Page 126 and 127: INTRODUCTION Coal (total reserves 2
Page 128 and 129: ีีีีีีีีี ั ิ
Page 130 and 131: RESULTS By Government: The outcomes
Page 132 and 133: The gas composition (12 samples ana
Page 134 and 135: Table 4. Coal Depth Interval Hole N
Page 136 and 137: The results of studies made on 11 c
Page 138 and 139: CONCLUSION CBM is still hoped to be
Page 140 and 141: The Government of Indonesia through
Page 142 and 143: The Berau basin is a major coal pro
Page 144 and 145: PP: CBM - 1 Rambutan (GOI Sponsor)
Page 146 and 147: Overview of Project for CO 2 Seques
Page 150 and 151: 3.5 25 3.0 20 Ar(%) C O 2(%) 2.5 2
Page 152 and 153: 20 8 10 0 6 δ13C of CO2(‰) -10 -
Page 154 and 155: Figure 1. Index map of Akabira Coal
Page 156: ORIGIN OF AKABIRA CBM In Akabira mi
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