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石油工业部河南石油勘探局,最近在周口盆地的两口探井中,首次在中生界下白垩统中试获油流;同时,在三口探井的上古生界石炭、二叠系中获良好天然气显示。 周12井位于沈丘凹陷的双楼田鼻状构造上,完钻井深4100m.该井自1489m进入下白垩统,2290m以下出现大套灰色泥岩夹砂岩,至井底未钻穿。2490m开始见油气显示,共有油斑、油迹细砂岩8层,总厚30m。突出的特点是泥浆槽面油气显示好,有5层槽面见大量油花和气泡,其中有一层油斑
Recently, Henan Petroleum Exploration Bureau of the Ministry of Petroleum Industry tested the oil flow in the Lower Cretaceous of the Mesozoic for the first time in two exploration wells in the Zhoukou Basin. At the same time, good gas was found in Upper Paleozoic Carboniferous and Permian of the three exploration wells . Well Zhou12 was located on the double-story nose-like structure of the Shenqiu Depression with a drilling depth of 4,100m.The well entered the Lower Cretaceous from 1489m, with a large set of gray mudstone sandstone below 2290m, which was drilled to the bottom of the well. 2490m began to see oil and gas show, a total of oil spots, oil sand 8 fine sandstone, the total thickness of 30m. Prominent feature is the muddy tank surface shows good oil and gas, there are a large number of 5 layers of oil seepage and bubbles, including a layer of oil spots