多参数地球化学勘探在沙漠地区圈闭构造含油气潜力评价中的应用——以塔里木盆地TD-2构造为例
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摘要
TD-2构造位于塔里木盆地中央隆起带东部,虽然地震和重力勘探证实其是一个基底隆起背斜构造,并且据区域地质构造演化分析具有良好的油气潜力,但因缺乏地球化学信息,进一步的勘探(如钻探)尚未进行。由此,开展了多参数地球化学勘探,所用参数为土壤游离烃(C1—C5)、酸解烃(C1—C5)、ΔC和Hg。结果的综合解释得出:对评价沙漠区TD-2构造的油气潜力来说,游离烃明显好于其他地球化学参数;近地表地球化学异常的形态和地球化学特征暗示,TD-2构造是一个含干气的构造,处于低—中等的逸散阶段。因此,TD-2构造应当具有一定的油气潜力。多参数地球化学勘探结果为进一步的勘探提供了重要依据。
TD-2 structure locates in the eastern area of the central uplift zone of Tarim basin, China. Although it is a basement-uplift anticline type structure which is verified by seismic and gravity exploration, according to analysis of regional geological evolution history, and it should have potential good for oil and gas, the further exploration such as drilling is suspended because of lacking geochemical information. Therefore, multi-parametric geochemical survey is conducted. These geochemical parameters include free hydrocarbons (C1-C5), acid hydrocarbons (C1-C5) of soil, ΔC amd Hg. Interpretation of the results leads to the conclusions that the free hydrocarbons are obviously more viable than other geochemical parameters for oil and gas potential evaluation of TD-2 structure in desert area, and the shapes of near-surface geochemical anomalies and geochemical characteristics parameters suggest that TD-2 structure is a dry gas-bearing structure at the early-middle dissipation stage. So TD-2 structure should have promising potential for oil and gas, and the results of multi-parametric geochemical survey have provided important information for further exploration.
TD-2 structure locates in the eastern area of the central uplift zone of Tarim basin, China. Although it is a basement-uplift anticline type structure which is verified by seismic and gravity exploration, according to analysis of regional geological evolution history, and it should have potential good for oil and gas, the further exploration such as drilling is suspended because of lacking geochemical information. Therefore, multi-parametric geochemical survey is conducted. These geochemical parameters include free hydrocarbons (C1-C5), acid hydrocarbons (C1-C5) of soil, ΔC amd Hg. Interpretation of the results leads to the conclusions that the free hydrocarbons are obviously more viable than other geochemical parameters for oil and gas potential evaluation of TD-2 structure in desert area, and the shapes of near-surface geochemical anomalies and geochemical characteristics parameters suggest that TD-2 structure is a dry gas-bearing structure at the early-middle dissipation stage. So TD-2 structure should have promising potential for oil and gas, and the results of multi-parametric geochemical survey have provided important information for further exploration.
引文
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[15]Xie Xuejing,Yang Binzhong.Application of multiparametric geo-chemical methods in the search for oil in the Qinggang region near Daqing Oil Field[J].Journal of Geochemical Exploration,1989,33:203-213.
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[17]吴国干,李华启,初宝洁,等.塔里木盆地东部大地构造演化与油气成藏[J].大地构造与成矿学,2002,26(3):229-234.
[18]黄传波.塔里木盆地寒武-奥陶系碳酸盐岩油气藏形成条件[J].新疆石油地质,2000,21(3):188-192.
[2]Laubmeyer G.A new geophysical prospecting method,especially for deposits of hydrocarbons[J].Petroleum,1933,29:1-4.
[3]Horvitz L.On geochemical prospecting[J].Geophysics,1939,4:210-225.
[4]Rosaire E E.Geochemical prospecting for petroleum[J].Am.Assoc.Pet.Geol.Bull.,1940,24:1401-1433.
[5]吴学明,赵文献.国外油气化探新进展[J].石油勘探与开发,1995,22(2):34-37.
[6]Hinkle M E,Ryder J L.Effect of moisture and carbon dioxide on concentrations of helium in soils and soil gases[J].J.Geophys.Res.,1987,92(B12):12587-12594.
[7]Xie Xuejing.Local and regional surface geochemical exploration for oil and gas[J].Journal of Geochemical Exploration,1992,42:25-42.
[8]Jones V T,Drozd R J.Predictions of oil and gas potential by near-surface geochemistry[J].Am.Assoc.Geol.Bull.,1983,67(6):932-952.
[9]陈远荣,戴塔根.浅论油气藏的逸散史与油气化探异常模式[J].地质与勘探,1999,35(6):71-73.
[10]Philp R P,Crisp P T.Surface geochemical methods used for oil and gas prospecting—A review[J].Journal of Geochemical Exploration,1982,17:1-34.
[11]Meyer R F.New methods for oil exploration[J].Anal.Chem.,1965,37:27-37.
[12]杨玉斌,张金来,吴学明.油气化探[M].武汉:中国地质大学出版社,1995:13-60.
[13]李景朝.油气化探异常的多参数评价方法与应用结果[J].长春科技大学,1998,28(3):288-295.
[14]李志明,宋喜林,张长江.游离烃技术在沙漠覆盖区构造含油气评价中的应用[J].物探与化探,2002,26(5):344-346.
[15]Xie Xuejing,Yang Binzhong.Application of multiparametric geo-chemical methods in the search for oil in the Qinggang region near Daqing Oil Field[J].Journal of Geochemical Exploration,1989,33:203-213.
[16]吴锡生.化探数据处理方法[M].北京:地质出版社,1993:83.
[17]吴国干,李华启,初宝洁,等.塔里木盆地东部大地构造演化与油气成藏[J].大地构造与成矿学,2002,26(3):229-234.
[18]黄传波.塔里木盆地寒武-奥陶系碳酸盐岩油气藏形成条件[J].新疆石油地质,2000,21(3):188-192.
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