新疆独山子油田原油中的孢子花粉

SPORES AND POLLEN FROM CRUDE OIL OF DUSHANZI OILFIELD IN XINJIANG

本文研究了新疆准噶尔盆地独山子油田原油中分离出的孢子花粉35属51种。基于原油中孢子花粉的研究,追溯了该含油区的油源并讨论了油气运移问题。根据原油中找到的孢子花粉化石来判断,准噶尔盆地西南含油区有两套油源岩系,即下一中侏罗统八道湾一头屯河组和渐新统安集海河组。

Fifty-one species of fossil spores and pollen referred to 35 genera extracted from the cru- de oil samples taken from the Dushanzi Oilfield of the Junggar Basin in the Xinjiang Province are investigated in this paper.Based on the investigations of the spores and pollen in crude oils,petroleum source of the region are traced and problems on petroleum migration are dis- cussed. The spores and pollen found in the crude oil samples collected from the Tertiary reser- voirs of the Dushanzi Oilfield are mainly of Leiotriletes adriensis,Cyathidites minor,Dictyo- phyllidites harrisii,Murospora jurassica,Marattisporites scabratus,Aratrisporites xiangxiensis, Schizosporis microreticulatus,Cycadopites nitidus,C.typicus,C.minimus,Callialasporites dam- pieri,C.radius.Paleoconiferous asaccatus,Pseudowalchia ovalis,P.landesii,Podocarpidites multicinus,P.multesimus,Ovalipollis enigmatica,O.minor,Caytonipollenites pallidus,Pteru- chipollenites thomasii,Alisporites grandis,A.bilateralis,Piceites pseudorotundiformis,Abie- tineaepollenites dunrobinensis,A.minimus,Pinuspollenites labdacus maximus,P.labdacus mi- nor,Piceaepollenites alatus,Cedripites canadensis,Tsugaepollenites viridifluminipites,Taxodia- ceaepollenites hiatus,Ephedripites eocenipites,E.fusiformis,E.tertiarius,E.scabridus,Eu- commiidites troedssonii,Salixipollenites discoloripites,Quercoidites henrici,Q.microhenrici, Q.asper,Rhoipites pseudocingulum,Caryapollenites simplex,Juglanspollenites verus,Liqui- dambarpollenites stigmosus,Chenopodipollis psilatoides,C.minor,Artemisiaepolleniws sellula- ris,Tubulifloridites maoroechinatus,etc.Some of the microfossils belong to Jurassic,and some belong to Tertiary in age. Judging from the fossil spores and pollen in crude oils,two series of petroleum source rocks might exist in the southwestern petroleum province of the Junggar Basin.They belong to the Lower to Middle Jurassic Badaowan to Toudenhe Formations and the Oligocene Anji- haihe Formation respectively.