SIMULATION EXPERIMENT OF THE GEOCHROMATOGRAPHIC EFFECT OF AROMATIC HYDROCARBONS DURING HYDROCARBON EXPULSION
-
摘要: 为考察芳烃系列地质色层效应,利用未混油或混油源岩样品在低温、加压条件下对块状暗色泥岩及灰质泥岩样品进行排烃模拟实验,实验样品来源于渤海湾盆地东营凹陷坨73井沙三下段3160m处泥岩及梁斜61井沙四上段2432m处灰质泥岩,两块样品有机碳含量分别为3.08%和4.0%,成熟度指标Ro分别为0.42%和0.45%。实验结果显示,芳烃系列地质色层效应强弱与芳烃化合物分子量大小呈正相关关系,分子量越大,运移能力越弱,地质色层效应越不明显;排烃过程造成萘等低分子量系列离子流含量整体升高,而三芳甾烷等高分子量系列离子流含量整体下降;在系列内部,重排后的1,3,6-TMN(三甲基萘)较1,2,5-TMN容易运移,甲基取代菲比其对应的无取代基的母体菲难以运移,氧芴、硫芴及联苯系列内部各化合物相对含量变化较大,该系列化合物有关比值具有作为油气运移指标的潜力。Abstract: A simulation experiment has been conducted at a low temperature(150℃) and pressurized condition in order to study the geochromatographic effect of the aromatic compounds in the course of the hydrocarbon expulsion from the black mudstone strata and the calcilutyte strata.The samples used in the experiment are source rock samples with or without oil mixed,which were collected respectively from the mudstone strata at 3 160 m in the lower part of the 3rd Member of Shahejie Formation,Well Tuo-73 and the calcilutyte strata at 2 432 m in the upper part of the 4th Member of Shahejie Formation,Well Liangxie-61 in the Dongying Sag,the Bohai Bay Basin.The organic carbon content of the two samples are 3.08% and 4.0%,and the vitrinite reflectance(Ro) are 0.42% and 0.45% respectively.The results show that the geochromatographic effect is directly related to the molecular weight,since the high-weight molecular hydrocarbon is more difficult to migrate and the geochromatographic effect is thus more insignificant.The hydrocarbon expulsion causes the ion flow content of the light-weight hydrocarbon series,such as naphthalene,increase and the ion flow content of the high-weight hydrocarbon series,such as triaromtic sterane,decrease in the whole.While within the hydrocarbon series,the rearranged 1,3,6-TMN(trimethylnaphthalene) can migrate more easily than the 1,2,5-TMN,whereas the dethylphenanthrene migrates more difficultly than the mother phenenthrene;the relative contents of the compounds in dibenzofurans,dibenzothiophenes,and biphenyl series change greatly compared with the other series,and the related ratios of the compounds within the above hydrocarbon series are regarded as potential indicators of hydrocarbon migration.
-
[1] Seifert W K,Moldowan J M,Smith G W,et al.First proof of structure of a C28-pentacy Clic triterpane in petroleum[J].Nature,1978,271(3):436～437 [2] Calson R M,Chamberlain D E.Steroid biomarker Clay mineral adsorption free energies:Implications to petroleum migration induces[J].Organic Geochemistry,1986,10(3):163～180 [3] 卢双舫,黄第藩,程克明等.煤成油生成和运移的模拟实验研究Ⅲ:甾、萜标记物特征及其意义[J].沉积学报,1995,13(4):93～99 [4] 陈中红,查明.烃源岩地质色层效应的模拟实验[J].地球化学,2006,35(2):157～166 [5] 张立平,黄第藩.某些海相烃源岩中多环芳烃的组成特征[J].石油勘探与开发,1997,24(2):10～l4 [6] 宋长玉,金洪蕊,刘璇等.烃源岩中甲基菲的分布及对成熟度参数的影响[J].石油实验地质,2007,29(2):183～186 [7] 邓津辉,史基安,王有孝等.石油二次运移的分子地球化学特征.[J].石油实验地质,2002,24(6):537～540 [8] 刘洛夫,毛东风.石油运移研究的新方法[J].地球科学进展,1996,11(6):607～610 [9] 刘洛夫.塔里木盆地群4井原油吡咯类含氮化合物的地球化学研究[J].沉积学报,1997,15(2):184～187 [10] 刘洛夫,徐新德,毛东风等.咔唑类化合物在油气运移研究中的应用初探[J].科学通报,1997,42(4):620～622 [11] 李素梅.王铁冠.张爱云等.原油中吡咯类化合物的分布特征及其地球化学意义[J].沉积学报,1999,17(2):312～317 [12] 李素梅,庞雄奇,金之钧等.沉积物中NSO杂环芳烃的分布特征及其地球化学意义[J].地球化学,2001,30(4):347～352 [13] 周杰,庞雄奇,李娜.渤海湾盆地济阳坳陷烃源岩排烃特征研究[J].石油实验地质,2006,28(1):59～64 [14] 罗佳强,沈忠民.油页岩在渤海湾盆地济阳坳陷下第三系石油资源评价中的意义[J].石油实验地质,2005,27(2):164～168 [15] 刘伟.东营凹陷沙河街组烃源岩结构及排烃成藏的控制作用[J].油气地质与采收率,2005,12(5):34～36,87～88 [16] 张守春.东营凹陷沙三段烃源岩生烃模式研究[J].油气地质与采收率,2005,12(4):53～55,89～90 [17] 孙永壮.东营凹陷南斜坡地层油藏成藏规律[J].油气地质与采收率,2006,13(4):58～60,114 [18] 王东良,刘宝泉,周建英等.塔里木盆地煤系烃源岩生排烃模拟实验[J].石油与天然气地质,2001,22(1):38～41 [19] 卢双舫,赵锡暇,王子文等.煤成烃生成和运移的模拟实验:芳烃产物的特征及其意义[J].沉积学报,1996,17(1):47～53 [20] 妥进才.柴达木盆地第三系芳烃的地球化学:二环芳烃与多环芳烃的关系[J].石油实验地质,1996,18(4):406～412 [21] Stranchan M G,Alexander R,Kagi R I.Trimethylnaphthalenes in crude oils and sediments:Effects of source and maturity[J].Geochimica et Cosmochimica Acta,1998,52(2):1255～1264 [22] 夏燕青,王春江,孟仟祥等.硫芴和氧芴成因模拟[J].科学通报,1998,43(15):1661～1663 -
计量
- 文章访问数: 690
- HTML全文浏览量: 50
- PDF下载量: 338
- 被引次数: 0
下载:
苏公网安备32021102000780号