OIL-SOURCE CORRELATION AND MIGRATION REGULARITIES IN THE CHEXI SAG, THE JIYANG DEPRESSION
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摘要: 通过对车西洼陷下第三系烃源岩特征、原油地化特征及油源对比、油气运移规律的综合研究认为,现今埋深2800~3000m以下的Es3(下—中)烃源岩是车西洼陷主力烃源岩,埋深2200m以下的Es3(上)及Es1烃源岩具有一定的低熟资源潜力;目前已发现的原油绝大多数源于Es3(下)优质烃源岩,而源于Es3(中),Es3(上)及Es1烃源岩的原油仅有零星发现;Es3(下)烃源岩早期生成油气以顺油源断层垂向运移至Es2储层成藏为主,后期由于垂向运移通道封闭,则以侧向进入Es4(上)储层或古潜山储层中成藏为主,Es3(下)烃源岩下伏Es4(上)储层或古潜山储层圈闭应该是今后勘探的重点。Abstract: Based on comprehensive study of source rock, geochemical characteristics of crude oil, correlation of oil and source and hydrocarbon migration pattern of the Eogene in Chexi sag, this paper draws several conclusions. Source rock in the lower-middle Es3 (the third member of Shahejie formation of Eogene) which is buried 2 800-3 000 m below is the major source rock in Chexi sag. Source rock in the upper Es3 and Es1 which is buried 2 200 m below has some potential of immature oil. At present, most crude oil comes from the high-grade source rock of lower Es3. Sporadic petroleum discoveries are related to source rock of the middle Es3, upper Es3 and Es1. Petroleum generated from source rock of the lower Es3 at first migrated vertically through faults to reservoir beds in Es2. Later, because that the vertical pathway was sealed, petroleum migrated laterally to reservoir beds in the upper Es4 or buried hill reservoir. These reservoir beds below source rock of the lower Es3 area the most important area for future exploration.
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Key words:
- correlation of oil and source /
- source rocks /
- the Eogene /
- the CheXi sag /
- the Jiyang Depression
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[1] 潘元林,张善文,肖焕钦等.济阳断陷盆地隐蔽油气藏勘探.北京: 石油工业出版社,2003.41~45 [2] 肖焕钦,陈广军,李长宝.济阳坳陷盆地拉张量及其石油地质意义[J].石油实验地质,2002,24(1): 13~18 [3] 王秉海,钱凯.胜利油区地质研究与勘探实践[M].东营:石油大学出版社,1992.58~59 [4] 胡见义,黄第藩.中国陆相石油地质理论基础[M].北京:石油工业出版社,1991.181~195 [5] Espitalie J,Bordenave M L.Rock-Eval pyrolysis[A].In: Bordenave M L,ed.Applied Petroleum Geochemistry[M].Paris: Editions Technip,1993.259~261 [6] 张林晔,孔祥星,张春荣等.济阳坳陷下第三系优质烃源岩的发育及意义[J].地球化学,2003,32(1):35~42 [7] 李丕龙.陆相断陷盆地油气地质与勘探(卷3)[M].北京:石油工业出版社,地质出版社,2003.29~41 [8] 张林晔,张春荣.低熟油生成机理及成油体系——以济阳坳陷牛庄洼陷南斜坡为例[M].北京:地质出版社,1999.7~12
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