26 2 20084 ACTA SED IMENTOLOGICA SIN ICA Vol. 26No Ap r. 2008 : 100020550 (2008) 0220308206 ( 163318),,, C C,,, ( ) : 193. 94 m l/g 175. 64 m l/g 161. 71 m l/g 385. 4 10 m 3 ; ;11. 40 10 11 24. 8 10 11 m 3 1962 E2mail: lushuangfang @ dqp i. edu. cn P593 A 0 R ice, 21. 4% [ 1 ], 1 /4, 10 10 m 3, [ 18 ],;, 2 843. 9 10 8 m 3, 38 629 10 8 m 3 7. 36%, (21. 4% )1 /3,,,, [ 911 ] 3 : (1),,, 10 m 100 m 1 000 m,, ( ) ; ( 2) [ 914 ], (() )?? ( 3)?? C 1,,?,,,,, (: 40572077) (20050220001) : 2007206218
2 : 309 1,( ) CH 4 CO 2 H 2 O,, C C C : 1 = X CH4 + X res + X CO2 (1) C ini = X CH4 C CH4 + X res C res + X CO2 (2) C ini = X CH4 C CH4 + X res C res + X CO2 C CO 2 (3), ini CH 4 res CO 2 CH 4 CO 2, X CH4 X res X CO 2 CH 4 CO 2 ( 1)1, ( )(X CH4 ) (X res )(X CO2 ) CH 4 CO 2 C,, CH 4 CO 2, C,: r CH4 = R CH 4 R CH4 + 1 = R st ( C CH4 + 1000) R st ( C CH4 + 1000) + 1000 (11) r res = R res R res + 1 = R st ( C res + 1000) R st ( C res + 1000) + 1000 () r CO2 = R CO 2 R CO2 + 1 = R st ( + 1000) R st ( + 1000) + 1000 () : ( r CH4 - r res ) X CH4 = r ini - r res + ( r res - r CO2 ) X CO 2 (14) X CH4 = r ini - r res + ( r res - r CO2 ) X CO 2 r CH4 - r res (15) X res = r CH 4 - r ini + ( r CO 2 - r CH4 ) X CO 2 r CH4 - r res (16), X CO2 O 1 1H 2 OCO 2 [ 15, 16 ] ), CH 4 CO 2, CH 4 X CH4 (0, 1 ) (V, m l/g) : R ini R ini + 1 1 = R CH4 R CH4 + 1 X 1 + R res R res + 1 X res + R CO 2 R CO2 + 1 X CO2 (4) C ini : R ini = = R st ( C ini + 1000) C ini 1000 C CH4 R CH4 = = R st ( C CH4 + 1000) C CH4 1000 C res R resini = = R st ( C res + 1000 C res 1000) C CO 2 R CO 2 = = R st ( + 1000) C CO 2 1000 R st = 0. 072 (5) (6) (7) (8) C ini C CH4 C res C CO2 : V = 22400X CH 4 2 (17), C ini C CH4 C res C CO2 1,, ( R CH4 R CH4 + 1 - R res R res + 1 ) X CH 4 = R ini R ini + 1 - R res R res + 1 + ( R res R res + 1 - R CO2 R CO 2 + 1 ) X CO 2 (9) r ini = R ini R ini + 1 = R st ( C ini + 1000) R st ( C ini + 1000) + 1000 (10) 1 Fig. 1Relationship between the C values of kerogen and the dep th in Songliao basin
310 26,, (2) C res, 0 (, 50 m, ) C < - 55 [ 17 ], C CH4 (3) CO 2,, (1), - 15 C CO2 /m 1 1 ( C, PD B) Table 1The C va lues of na tura l ga s of W ell Yan shen1 in Qa idam ba sin( C, PD B) C CO2 C CH4 /m C CO2 C CH4 104 -. 57-69. 95 2052-15. 32-62. 69 9 -. 37-69. 74 2057-16. 68-62. 232 -. 96-63. 79 20-16. 92-63. 83 273-14. 04-65. 47 22-16. 55-64. 08 332-11. 14-66. 8 2179 -. 87-65. 93 505-9. 41-67. 68 2195-11. 43-63. 14 519 -. 4-72. 07 2239-16. 73-64. 06 533-10. 62-71. 92 2345 -. 14-63. 18 1652-15. 62-62. 1 2358 -. 59-64. 01 1739-17. 02-60. 2454 -. 09-62. 68 1904-17. 3-59. 98 2536-15. 72-62. 28 1905-18. 91-60. 38 2949 -. 06-59. 79 1935-18. 95-61. 77 3 4 CH 4 ( CO 2, ), ;,, 1 200 m (, ), 193. 94 m l/g 175. 64 m l/g 161. 71 m l/g,, (2), 385. 36 10 m 3,,,,3 /4
2 : 311 4 Fig. 4Relationship between the biogenic gas yield from organic matter calculated by carbon isotop ic equilibrium method and the dep th 2 ( 10 m 3 ) Table 2Ga s2genera ted quan tity of var ious ga s source rock in north of Songliao ba sin ca lcula ted by carbon isotop ic equ ilibr ium m ethod( 10 m 3 ) Q 0. 45 N 2 t 0. 54 0. 30 N 1 d 0. 34 0. 24 E 3 y 0. 28 0. 29 E 3 m 2 4. 42 3. 82 2. 45 E 3 m 1 8. 58 7. 77 6. 33 E 3 s 5. 52 5. 00 4. 19 E 3 n 5 1. 62 1. 54 1. 41 0. 60 E 3 n 4 6. 80 6. 71 6. 18 3. 37 E 3 n 3 24. 55 22. 31 21. 80 16. 16 E 3 n 2 116. 67 103. 90 86. 64 86. 34 E 3 n 1 108. 07 102. 37 96. 06 94. 02 E 3 y 2 + 3 8. 59 8. 47 8. 21 7. 63 E 3 y 1 4. 96 4. 93 4. 54 4. 06 E 3 qn 2 + 3 48. 55 48. 08 47. 89 47. 32 E 3 qn 1 45. 43 45. 26 44. 59 44. 28 385. 36 361. 00 330. 31 303. 79 4,,,, [ 18, 19 ] ), ( ),, ( f), ( 3), 11. 40 10 11 24. 8 10 11 m 3,,,,, 3 ( 10 8 m 3 ) Table 3The resource quan tity collection of b iogen ic ga s in the north of Son liao ba sin ca lcula ted by carbon isotop ic equ ilibr ium m ethod Q 5. 96 5. 73 2. 73 N 2 t. 68 9. 75 4. 77 N 1 d 11. 42 7. 50 3. 75 E 3 y 5. 62 4. 18 2. 05 E 3 m 2 218. 39 147. 42 82. 31 E 3 m 1 331. 76 218. 19 1. 61 E 3 s 255. 80 171. 00 93. 43 E 3 n 5 93. 23 65. 09 38. 45 E 3 n 4 389. 34 271. 75 160. 43 E 3 n 3 1531. 84 1100. 73 681. 41 E 3 n 2 7422. 14 5382. 25 3380. 25 E 3 n 1 6741. 21 4869. 69 3048. 83 E 3 y 2 + 3 593. 55 437. 88 283. 41 E 3 y 1 403. 15 307. 78 208. 87 E 3 qn 2 + 3 3553. 93 2637. 04 1721. 89 E 3 qn 1 3262. 14 2416. 67 1573. 24833. 17 18052. 67 199. 33 5,
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2 : 3 The Carbon Isotopic Equilibrium M ethod of Evaluating the Biogas2generated Quantity and the Generation Period : its application LU Shuang2fangXU Q ing2xial IU Shao2junSHEN J ia2nian XUE Hai2taoWANG M inhu Hui2ting ( Daqing Petroleum Institute, Daqing, Heilongjiang, 163318) AbstractThe biogas generation period p lays a very important role in its accumulation. But now there is not a credit2 able and effective method to app raise it. A im ing at this difficult p roblem, and considering it s a carbon isotope bal2 ance p rocess, regardless of the formation mechanism s of biogenic gas. The C and C amount of initial organic matter before generation and that of residual organic matter and other p roductions after generation should keep conservation. Carbon isotop ic equilibrium method (model) is exp lored and established to assess biogenic gas in this paper, which is demarcated and app lied according to the abundant analyzed data in Songliao basin. Results show that the accum ula2 tively generated biogenic methane of, and types organic matters are 193. 94 m l/g, 175. 64 m l/g and 161. 71 m l/ g, respectively. The biogas2generated quantity of source rock in the research area is about 385. 4 10 m 3. The major period of biogenic gas generation occurs before the end of Nenjiang period. tween 11. 40 10 11 m 3 and 24. 8 10 11 m 3. The possible biogas resource is be2 Key wordsbiogas, gas2generated quantity, generation period, carbon isotop ic equilibrium method, resource quanti2 ty