A Study On The Reservior Formation Regulation And Exploration Target In Kendong Area

By way of the study of the structural characteristic, stratigraphic characteristic and reservior characteristic in Kendong area, this paper synthetically analysises the reservior formation regulation in aspect of the oil & gas gathering, reservoir-cap assemblages, reservior style and distribution, and control factor of oil & gas. Finally, the exploration deployments are difinitized.The Kendong uplift locates on the west edge of Tan-Lu fault belt, the eastern of Zhanhua depression. It is a higher buried-hill drape structural belt developped on the background of the pre-Tertiary buried hills, which has the characteristic of various structural style and diversiform oil & gas distribution. In terms of the regional stress field characteristic, by the influeced of the right-lateral strike-slip and the produced dextralpull-apart of Tanlu fault zone, the Kendong uplift evolved into different structural styles and three secondary structural units, that is the northern, western and eastern slope zones.The point-bar of upper Guantao formation if the mainly oil-bearing series. The sigle-sandstone body formed by the riverway transfer has the large lateral variation and complex comparative relation. The disconnective sandstone bodies are superpose and interlude in vertical and overlapp-linked in landscape orientation. Intergrated with the biomarker, the oil source correlation revealed four oil source in this area, that is the western Gunan-Fulin oil source, the northern Zhuangdong oil source, the eastern Laizhouwan oil source and the southern Qingdong oil source. Thereinto, the northern Zhuangdong oil source is the mainly oil source in this area. The oil vertical migrated by the Kendong faults belt and the NNE strike-slip faults belt, and migrated by the super Guantao formation in landscape orientation. Finally, the oil migrated to the higher position of the uplift and accumulated in Guantao-Minghuazhen formation. The reservior formation mode is exo-source, verticle migration and meshwork-carpet pool-forming mode, which formed three effective migration accumulation system.The obvious regulation consist in the oil distribution of Kendong area and the hydrocarbon migration and accumulation styles in three slope zones are different.Hydrocarbon migrates in space form and a structural-lithologic pool is formed in the northern slope zone.Hydrocarbon migrates in net carpet form and a lithologic pool is formed on ancient physiognomy in the western uplift zone.Hydrocarbon migrates in ladder form and a fault-lithologic pool is formed in the eastern slope zone.Based on the research of the reservoir formation regulation and the analysis of the exploration status, three arrangement of farther exploration in Kendong area are confirmed. The first is the conbining of evaluating and roll-exploration, enlarging the oil-bearing area of the wester zone, and achieving the united oil-bearing area. The second is the evaluating the five fault block in eastern slop zone, exclusively. The third is the probing the mesozoic and paleozoic buried-hill, and forming a multimillion ton grade reserves position.