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中原油田外围普查最近又有新的发现。前已查明,中原油田的主要油气藏均赋存于凹陷中央背斜构造带的各背斜或断块构造上。凹陷两侧除在东缘聊兰断层下降盘发现了具逆牵引构造性质的白庙气田外,近来地矿部华北石油地质局又在西侧胡状集-庆祖集断阶带张河沟断块构造上施工的开37井钻遇了埋藏浅、厚度较大并集中,储油物性较好的油层,经继续钻探控制的含油范围又有扩大,从而在油田外围找到了一种新类型的油藏。开37井钻遇的油层位于下第三系沙河街组三段,于井深1709.0—2041.8米井段内共见油层19层。油层较集中于上部约100米的层段内,含油层砂岩粒度较粗,结构疏松,孔隙度为20—26%,
Central Plains oil field census recently found new discoveries. It has been previously identified that the major reservoirs of the Zhongyuan oil field are hosted on anticlines or fault blocks in the central anticlinal tectonic belt of the depression. On both sides of the depression, besides the Baimiao gas field with reverse traction tectonic features on the downgrade of the Chatland Fault on the eastern margin, the North China Petroleum Geology Bureau of the Ministry of Geology and Mineral Resources recently revisited Zhanghe Gouzou Block 37 constructed well drilled an oil layer buried shallow, thick and concentrated, with good reservoir properties. After the further drilling control, the oil content range expanded and a new type of Reservoir. The reservoir drilled by drilling well 37 is located in the third section of Shahejie Formation of Lower Tertiary III and a total of 19 layers of oil reservoirs are found in the interval of 1709.0-2041.8 meters of well depth. The oil layer is more concentrated in the interval of about 100 meters in the upper part. The sandstone of the oil-bearing layer has coarse grain size and loose structure with a porosity of 20-26%