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一、勘探现状 1980年以来.国外礁油气藏勘探很活跃,发现了一些小油藏。原有的礁块油气田继续勘探,范围不断扩大,开发寿命延长。著名的美国密执安盆地礁油藏,特别是志留系Niagaran组礁油气藏一直是该盆地主要的勘探目标。1984年该盆地新发现的68个油藏,74%是Niagaran组的礁油藏。1985年新发现的69个油藏,69%是Niagaran组的礁油藏。苏联1983-1985年在欧州盆地发现的大部分小油藏,主要在伏尔加-乌拉尔盆地的隆起区,即鞑靼、巴什基尔自治共和国和彼尔姆行政区境内上泥盆统碳酸盐岩层中的礁岩隆和这些礁岩上的披覆中。礁油气聚集带位于大型隆起及相邻洼陷的斜坡上,在Kharyaga油田发现的10个油藏,其中有礁岩油藏。在波罗的盆地加里宁格勒行政区和立陶宛志留系碳酸
I. Status of Exploration Since 1980, the exploration of foreign reefs and reservoirs has been very active and some small reservoirs have been discovered. The original reef block oil and gas exploration continued to expand the scope of development life expectancy. Well-known reef oil reservoirs in the Michigan basin in the United States, and especially the Silurian reefs and reservoirs of the Silurian, have been the major exploration targets of the basin. Of the 68 newly discovered reservoirs in the basin in 1984, 74% were reefs of the Niagaran Formation. Of the 69 newly discovered reservoirs in 1985, 69% were reefs from the Niagaran Formation. Most of the small reservoirs discovered by the Soviet Union in the Eurasian Basin from 1983 to 1985 were mainly located in the uplifted area of the Volga-Ural basin, namely the Upper Devonian carbonate layer within Tartar, Bashkir Autonomous Republic and Perm In reef Yan Long and these reefs in the drape. Reefs The hydrocarbon accumulation zone is located on the slopes of large uplifts and adjacent depressions. There are 10 reservoirs found in the Kharyaga field, among which are reef reservoirs. Kaliningrad region in the Baltic Basin and Lithuanian Silurian carbonic acid