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下古生界碳酸盐岩遍布整个华北,是主要油气储层。作者在收集整理大量的钻井资料基础上,查明了十几种岩溶油气储集岩的孔隙类型:组构溶孔、非组构溶孔和裂缝三大类;分区评价了储集岩的岩溶发育程度。初步确定由加里东运动影响而造成的下古生界侵蚀面下岩溶化深度约在350米以内,并且其岩溶储集层的储集性能比350米以下的储层要好两倍以上。
Lower Paleozoic carbonate rocks throughout North China, is the main oil and gas reservoirs. Based on the collection of a large number of drilling data, the authors identified the pore types of a dozen karst hydrocarbon reservoirs: structural dissolved pores, non-structured dissolved pores and fractures; and evaluated the karstification of reservoir rocks Degree of development. The karst depth beneath the lower Paleozoic eroded surface caused by the Caledonian movement was initially determined to be within about 350 m, and its karst reservoirs were more than twice as likely to accumulate as reservoirs below 350 m.