中文摘要：

对尕斯库勒油田N1-N2^1油藏的钻采情况进行分析发现，近年来该油藏下盘跃350井区在钻井过程中经常钻遇异常高压区。以350井区为例，对异常高压区进行分析认为：在注采井组中，注水并射开不连通的地层后，经过长期的注水，注入水在孤立油砂体的地层附近形成高压区，即异常高压区。分析形成异常高压区的原因有3个：储层砂岩体中粘土矿物的存在、孤立油砂体的不连通性及加密注水井。建议今后在异常高压区域钻注水井时，应对钻井区进行全面地质论证，充分考虑地层在长期高压注水的情况下，地层纵、横向上的压力变化，根据实际地质情况，对油藏进行精细描述，结合油砂体的分布，分析油藏水驱油效果及油水关系，对注水油藏进行开发调整，以便更好地认识油藏中的孤立油砂体，有针对性地开发孤立油砂体。

英文摘要：

Recent drilling and oil production operations on the N1-N2^1 block in the Gasikule Oilfield indicates specific abnormal pressure zones. Researches on the Yue 350 Well indicate origin of abnormal pressure zone. After noncommunicating formations are communicated by water injection among injection-production wells for a long term, the injected water tend to form high pressure zones nearby the isolated oil sandstone. Three reasons for abnormal pressure are respectively clay minerals in sand reservoir, noncommunicating isolated oil sandstone, and concentrated injection wells. It is recommended that the drilling area should be comprehensively analyzed with respect to geological characteristics if injection wells will be drilled at abnormal pressure zone in the future with great considerations of the pressure variation along vertical and horizontal directions under long period of injections. Based on the actual geologic condition, the fine description of reservoir should be conducted combining the distribution of oil sandstones to analyze the water drive effects and to adjust production proposal, so that the isolated oil sandstones are recognized well to exploit them with specific intentions.