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钙质含量旋回在卡拉沙依组小层对比中的应用

APPLICATION OF CALCAREOUS CONTENT ALLOCYCLES TOMINI-LAYER CORRELATION OF THE KALASHAYI FORMATION

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【作者】 蒲仁海党晓红张惠李艾红

【Author】 PU Ren-hai 1), DANG Xiao-hong 1), ZHANG Hui 1), and LI Ai-hong 2)( 1) Continental Dynamic Laboratory, National Education Key Laboratories, Department of Geology,Northwest University, Xi’an, 710069;2) Institute, Northwest Petroleum Bureau, Sinopec, Urumqi,830011)

【机构】 西北大学大陆动力学教育部重点实验室中石化西北分公司研究院 西北大学地质系陕西西安710069西北大学地质系陕西西安710069新疆乌鲁木齐830011

【摘要】 塔河油田卡拉沙依组河道相砂岩油层夹于卡三段和卡四段的泛滥平原泥岩中,小层对比时缺乏时间—岩性标志层。研究发现该地层中钙质含量变化似乎反映出与三级海平面变化有关的异旋回特点,因而具等时意义。根据钙质含量引起的电阻率和自然伽玛测井曲线变化和旋回特征将卡三段、四段自上而下分为5个小层。各小层厚度一般在80—100m之间,小层界线在连井地震剖面上均标定在同一个同相轴上,也反映了等时性。含油气砂岩较薄的单层厚度(2—5m)和河道微相类型决定了它们在横向上多为井间不连通的透镜状分布。

【Abstract】 The Carboniferous Kalashayi Formation in the Tahe Oilfield occurs as lenticular channel facies of sandstones interbedded between the overbank mudstones of Members K3 and K4. Minilayer correlation is difficult due to lack of isochronous lithologic mark. Based on cycles of resistivity and Gamma ray logs that change with calcareous contents in mudstones, Members K3 and K4 are subdivided into five minilayers, Ⅰ,Ⅱ,Ⅲ, Ⅳ, andⅤ in descending order. Each minilayer, 80—100m thick, situated on the same event when calibrated on a well-linked seismic section, suggesting isochronism of such stratigraphic correlation. The small thickness(2-5m) and channel type of the sandstones reservoir suggest their laterally limited distribution and disconnection between wells.

【基金】 中石化“塔河油田石炭系储层预测”项目资助。
  • 【文献出处】 地层学杂志 ,Journal of Stratigraphy , 编辑部邮箱 ,2005年03期
  • 【分类号】P534.45
  • 【被引频次】7
  • 【下载频次】265
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