摘要
北大港构造东翼是大港油田勘探的重要领域,预测该区地层压力对油气勘探开发具重要意义.本文在应用该区构造、沉积和储层研究成果,结合已完钻井实测压力资料,综合分析认为,泥岩欠压实作用是形成该区异常高压的主要原因.依据异常压力形成机理,优选压力预测方法,利用已完钻井GR、AC(RT)、DEN测井资料、压力测试和钻井液密度等实测数据,采用压力梯度趋势线法预测该区地层压力.通过对该区单井泥岩欠压实带的分析,绘制泥岩欠压实剖面图,显示泥岩欠压实带在垂向上的分布.在此基础上进行单井压力预测,编制主要目的层压力平面分布图,找出平面分布规律,分析异常高压与储层关系.钻探实施证实,压力预测方法优选合理,预测结果可靠,应用效果良好.
The eastern flank of Beidagang structure is one of main targets for exploration. It is important to predict the pressure of oil reservoir for oil ＆ gas exploration and development. On the basis of the structure, sedimentary faces and reservoir, combined with data from well, this paper draws the conclusion that the abnormal high pressure here is mainly caused by the undercompacted shale. According to the mechanism of abrnomal pressure, the method of pressure gradient trendline is selected to predict the pressure by using well log data of GR, AC（or RT） and DEN, test pressure data and drilling fluid density in this area. After researches the undercompaced shale zone, draws its profile map to show the distribution of undercompaced shale in vertical direction, this paper predicts the pressure in well, and makes the isomap of main production formation pressure, then analyzes the distribution law of pressure in horizon and realizes the relations between abnormal pressure and reservoir. The conclusion of this paper is proved by drilling well that the method of pressure prediction is valid and the pressure data of prediction is trusty.
出处
《新疆地质》
CAS
CSCD
北大核心
2009年第3期280-282,共3页
Xinjiang Geology
基金
国家重点基础研究发展计划(973计划)(G1999043304)成果资助
关键词
压力预测
异常高压
压力梯度趋势线
泥岩欠压实
Predict pressure
Abnormal high pressure
Undercompacted shale
Pressure gradient trendline
