STUDY ON GEOCHEMICAL TRACKING FOR THE PERIODS OF RESERVOIR-FORMING OF OIL AND GAS IN THE TAHE OILFIELD
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摘要: 应用油藏地球化学的方法对塔河油田的成藏期次进行了探讨。塔河油田稠油正构烷烃分布完整,但色谱基线不同程度抬升;原油非烃和沥青质碳同位素偏轻,族组成碳同位素发生倒转;原油中普遍含有25-降藿烷。这些特征表明该区油藏经历了至少两期成藏过程,早期充注原油遭受生物降解作用后又受到高成熟原油充注。塔河油田天然气为典型的油型气,成熟度较高,为成熟—过成熟阶段产物,亦显示了两期充注的特征:早期充注的为典型的原油伴生气,充注时间与后期原油的充注时间相同;晚期充注的为高温裂解气,充注方向为自东向西。因此,塔河油田至少存在着3次油气充注过程。Abstract: The geochemical characteristics of oil and natural gas contain a lot of information on organic matter of source rocks,evolution of hydrocarbon generation,hydrocarbon migration direction and hydrocarbon reservoir-forming stages.Based on systematic research of the geochemical characteristics of crude oil and natural gas from the Tahe Oilfield,the reservoir-forming stages of the Tahe Oilfield was discussed.The geochemical characteristics of the crude oils from the Tahe Oilfield are very similar,which imply that the oils are derived from the same source.The characteristics of the oil from the Tahe Oilfield reveal that it had been underwent two oil infilling stages of which the former infilling oil had relative lower maturity and was strongly biodegraded and the later infilling oil had high maturity.The natural gas from the Tahe Oilfield belongs to the typical petroliferous gas with high maturity,which falls into mature to overmature.The geochemical characteristics of natural gas from the Tahe Oilfield reveals that it had two stages of charging.The first was gas associated with crude oil and the second was pyrolysis dry gas.So there at least exists 3 times of hydrocarbon charging in the Tahe Oilfield.
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Key words:
- Crude /
- oil natural gas /
- biodegradation /
- hydrocarbon reservoir-froming stage /
- the Tahe Oilfield /
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[1] 赵靖舟.油气成藏年代学研究进展及发展趋势[J].地球科学进展,2002,17(3):378～383 [2] 王飞宇,金之钧,吕修祥.含油气盆地成藏期分析理论和新方法[J].地球科学进展,2002,17(5):754～762 [3] 陈建渝,刘从印,张树林等.原油中生物标志物的组成是成藏史的反映[J].地球科学——中国地质大学学报,1997,22(6):97～102 [4] 顾忆.塔里木盆地北部塔河油田油气藏成藏机制[J].石油实验地质,2000,22(4):307～312 [5] 顾忆,黄继文,邵志斌.塔河油田奥陶系油气地球化学特征与油气运移[J].石油实验地质,2003,25(6):746～750 [6] 马安来,张水昌,张大江等.轮南、塔河油田稠油油源对比[J].石油与天然气地质,2004,25(1):31～38 [7] 王铁冠,王春江,何发歧等.塔河油田奥陶系油藏两期成藏原油充注比率测算方法[J].石油实验地质,2004,26(1):74～79 [8] 张水昌,梁狄刚,张宝民等.塔里木盆地海相油气的生成[M].北京:石油工业出版社,2004.202～298 [9] 陈红汉,李纯泉,张希明等.运用流体包裹体确定塔河油田油气成藏期次及主成藏期[J].地学前缘,2003,10(1):190 [10] 康玉柱.塔里木盆地塔河大油田形成的地质条件及前景展望[J].中国地质,2003,30(3):315～319 [11] 徐国强,刘树根,李国蓉等.塔中、塔北古隆起形成演化及油气地质条件对比[J].石油与天然气地质,2005,26(1):114～119 [12] 包建平,王铁冠,周玉琦等.甲基菲比值与有机质热演化的关系[J].江汉石油学院学报,1992,14(4):8～13,19 [13] 皮得斯K E,莫尔多万J M.生物标记化合物——古代沉积物和石油中分子化石的解释[M].北京:石油工业出版社,1995.178～187 [14] 戴金星,戚厚发.鉴别煤成气和油型气等指标的初步探讨[J].石油学报,1985,6(2):31～38 [15] 张士亚,郜建军,蒋泰然.利用甲、乙烷碳同位素判识天然气类型的一种新方法[A].见:地质矿产部石油地质研究所.石油天然气地质文集(第1集)中国煤成气研究[C] ,北京:地质出版社,1988.48～58 [16] 徐永昌.天然气成因理论及应用[M].北京:科学出版社,1994 84～222 [17] Chung H M.Origin of gaseous hydrocarbons in subsurface environments:Theoretical considerations of carbon isotope[J].Chemical Geology,1988,71:71～ 103 [18] 赵孟军,周兴熙,卢双舫等.塔里木盆地天然气分布规律及勘探方向[M].北京:石油工业出版社,2002.128～219 -
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