| D型菌解无定形体的形成及其生烃模式 |
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| 引用本文： | 丁安娜,惠荣耀.D型菌解无定形体的形成及其生烃模式[J].地质科学,1997,32(2):221-228. |
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| 作者姓名： | 丁安娜 惠荣耀 |
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| 作者单位： | 中国科学院兰州地质研究所, 兰州 730000 |
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| 摘 要： | 通过对准噶尔盆地部分油藏烃源岩的电子显微镜研究,在大量样品中检出D型菌解无定形体,其母质来源具有二元混合性,形成在弱还原─原环境中,生烃门限Ro值为0.4%,生烃期大约为0.4%-0.7%,是轻质油(或凝析油)和天然气形成的重要组分之一。在低演化阶段,由于细菌参加了对有机质的改造,使ⅡB-Ⅲ类烃源岩中富集氢,生烃能力变好。文章还初步探讨了芳烃化合物含量与菌解无定形体D形成的关系,指出当沉积体系中的硫和硫化氢与铁结合,形成稳定的黄铁矿物后,才有可能在Ⅲ型有机质中形成高含量的D型菌解无定形体。
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| 关 键 词： | 菌解无定形体D 油气形成 低熟油 准噶尔盆地 |
| 收稿时间： | 1996-03-25 |
| 修稿时间： | 1996-03-25; |
THE FORMATION 0F TYPE - D BACTERIDECOMPAMO- RPHINITE AND ITS HYDROCARBON GENER ATING PATTERN |
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| Ding Anna Hui Rongyao Xia Yanqing.THE FORMATION 0F TYPE - D BACTERIDECOMPAMO- RPHINITE AND ITS HYDROCARBON GENER ATING PATTERN[J].Chinese Journal of Geology,1997,32(2):221-228. |
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| Authors: | Ding Anna Hui Rongyao Xia Yanqing |
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| Institution: | Lanzhou Institute of geology, Chinese Academy of Sciemces Lanzhou 730000 |
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| Abstract: | This paper provides new evidenoe foc fact that baderia participate in the transformation of organic matter at the carly evoludonary stage.A large amouat of type-D bacteridecompamorphinite were found in kerogens of soume rocks in part of oil resewoin of Junggar basin.Studia oa the compoddon of biogenetic soume and formadon environment for type D bactdeompaznorphinite,and its hydrocarbon-generating potar tial etc.show that samples rich in that samples richmpamorphinite from Junggar basin are mainly in ⅡB to Ⅲ range in the type figure of oil-generating rock according to Tmax values and ⅠH index division. Its original materials have mixed characteristics of both terrestrial higher plant and aguaic orgaisms from fresh water and it might be formed in the environment from weak to usual reduction.It is suggeted that bacteridecompamorphir-D occures in lhe lower evoludonary.stage.Its threshold of hydrocarbon produdion,Ro.value,is about 0.4%,and for most samples in the bydrocarboa-geaendag period 0.4%-0.7%.When Ro.value reaches 0.8%,hydrocarbon drain off generally ends.The bade ridecompamorphinite-D is one of major materials of forming light oil(or condensak) and natural gas in the low maturity stage.Bactaia reform of the organic matter inaeases hydrogen coatmt in type ⅡB toⅢ soume rocks,hydrocarbon-genera potential.Type D bacterideoznpamorphinite is not the bat,as compamd to A,B,C,but better than none.ln the soume rock,the amount of bacteridecompamorphinite is contmled by the content of aromatic coompounds,beause they have toxidty for bacteeria.For example,the amount of D type bacteridecompamorphinite decrases with the increas of the dibenzothiophene compound,therefore,the authort thinks that a large amouat of dibenzothiophene and other aromatics are easily formed when hgher plant bearing rich xylem is decomposed in the type Ⅲorganic matter Only when Sulphur and hydrogen sulphide in the deposit system combine with iron to from pyrite minerals which are stable can a largy amouot of bacteridecompamorphinite be formed. |
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| Keywords: | Bacteridecompamorphite - D Oil and gas fomadoa Lowmature oil Junggar Basin |
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