The Effect of the Paleogene-Neogene Magmation on Hydrocarbon-Generating Region of the Upper E<SUB>s3-4——Middle Es3 Dark Argillaceous Rocks in Dongying Depressionspace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
详细信息
- 责任者：Gong Jianluo (State Key Laboratory for Continental Dynamics ; Department of Geology ; Northwest University ; Xi’an 710069 ; China) ; Zhang Jingong
- 刊名：Journal of Northwest University
- 出版年：2013
- 卷期：41(1)
- 页码：p.101-108
- issnNo：ISSN1000-274X
- isbnNo：CN61-1072/N
摘要
<SPAN id=EnChDivSummary name="EnDivSummary">Aim To probe effect of Paleogene—Neogene magmation on hydrocarbon-generating region of argillaceous rocks in the Es3-4 in Dongying Depression.Methods Using the data of magmatic rocks derived from the drilling wells and logs of approximate 160 wells to plot the map for distribution of the Paleogene—Neogene magmatic rocks in Dongying Depression,to study the characteristics of the present geotemperature and paleogeotemperature,and the characteristics of the thickness and burial depth and hydrocarbon generation of the upper Es4—middle Es3 dark argillaceous rock in the region of magmatic rocks distribution.Results The Paleogene—Neogene magmatic rocks are mainly distributed in the west and south of Dongying Depression.In this area,the burial depth of the upper Es4—middle Es3 dark argillaceous rocks are relatively shallow,generally ranging from 800 to 2 000m,the present geothermal gradients are relatively high,generally ranging from 3.6 to 4.0℃/100m,the paleogeotemperature in the period of the Paleogene—Neogene magmatic activity is much higher than the present geotemperature,and the hydrocarbon-generating threshold depth is less than 1 170 m.Conclusion The effective hydrocarbon-generating region of the upper Es4—middle Es3 dark argillaceous rocks relating to the Paleogene-Neogene magmation is mainly distributed in the area of shallow burial depth of dark argillaceous rocks,the western and southern Dongying depression,which is complementary to the effective hydrocarbon-generating region of the upper Es4—middle Es3 dark argillaceous rocks relating to burial depth in a plane,resulting in the effective hydrocarbon-generating region of the upper Es4—middle Es3 dark argillaceous rocks almost covering the entire Dongying depression.During the exploration of oil and gas in the Dongying depression,it should be fully taken account of the effects of the effective hydrocarbon-generating region of the upper Es4—middle Es3 dark argillaceous rocks relating to the Paleogene—Neogene magmation on the formation and distribution of oil and gas reservoir,and the exploration of shale oil and gas reservoir in the area of shallow burial depth of dark argillaceous rocks affected by the Paleogene—Neogene magmation should be strengthened.