褶皱喀尔巴阡山脉Pohar地块地质构造及油气勘探前景

V.Ye. Shlapinsky, M. Pavlyuk, Y. Lazaruk, O. Savchak, Myroslav Ternavsky
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摘要

Pohar地块位于利沃夫地区的Skole区,位于Skole镇西南30公里处,位于Pohar和Kryve村之间。从构造上讲,它位于Skybian (Slavske Skyba)和Krosno盖层的交界处。在十九世纪末,二十世纪初,在这个村庄的地区,石油开采企业已经存在。已开发出克罗诺盖层Rozluch带渐新统和始新统以及斯基边盖层Slavske skyba规模渐新统的矿床。在两个十年的开采中,通过探井和浅井开采,开采了3000多吨石油。Pohar地块的前景应与具有良好储层性质的Oligocen Holovets组(Klivsky砂岩)砂层相联系。它们位于被Rozluch断层(构造屏蔽矿床)与其叉球部分隔开的Krosno盖层的Hrosivsky规模的浸没部分,在1973-1974年1-Pohar钻孔(井底1935 m)中钻探,由于其孔向东南偏斜,没有暴露出Klivsky砂岩,也没有解决其任务。为了完整地展示Hrosivsky尺度渐新统Holovets组的Klivsky砂岩,需要设计2300 m的垂直定向2-Pohar井眼。克利夫斯基砂岩层位可能的商业含油饱和度不仅证明了过去采油企业的存在,而且在Rozluch断裂控制的伸展区也显示出密集的地表石油。此外,考虑到给定盖层交界处的勘探前景,应在Pohar地区进行地震调查,估算较深层位的地质构造,并设计4000 ~ 5000 m的参数钻孔。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Geological structure and prospects of oil-gas presence at the Pohar plot (Folded Carpathians)
The Pohar plot is situated in the Skole district of the Lviv Region, 30 km south-west of Skole town, between Pohar and Kryve villages. Tectonically it is located in of junction of the Skybian (Slavske Skyba) and the Krosno covers. At the end of XIX beginning of XX centuries in the region of the village the oil-extracting enterprise was existent. There deposits of Oligocen and Eocene of the Rozluch belt of the Krosno cover and Oligocene of the scale of the Slavske skyba of the Skybian cover were exploited. During two ten-years of exploitation by exploring shafts and shallow boreholes more than 3 thousand ton of oil was extracted. Prospects of the Pohar plot should be connected with sand horizons of the Holovets suite of Oligocen (Klivsky sandstones) that are characterized by satisfactory reservoir properties. They are localized in the immersed part of the Hrosivsky scale of the Krosno cover separated by the Rozluch fault (tectonically screened deposit) from its forkball part, drilled in 1973–1974 1-Pohar borehole (well bottom 1935 m), due to deflection of its hole to the south-east, didn’t expose the Klivsky sandstones and didn’t solve its task. For complete exposition of the Klivsky sandstones of the Holovets suite of Oligocene of the Hrosivsky scale it is necessary to design vertically oriented 2-Pohar borehole of 2300 m in depth. About probable commercial oil-gas saturation of the horizon of the Klivsky sandstones testifies not only to the existence of the oil-extracting enterprise in the past, but the intensive surface oil shows in the stretched area that is controlled by the Rozluch fault. Moreover, taking the prospect of the zone of junction of the given covers in consideration, the seismic survey should be conducted at the Pohar area for the estimation of the geological structure of the deeper horizons and parametric borehole of 4000–5000 m in depth should be designed.
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