辽河油田滩海地区油气层识别及评价方法

Recognition and evaluation of hydrocarbon reservoir
in foreshore area of Liaohe Oilfield

 孙娜

Sun Na

 辽河油田公司勘探开发研究院，辽宁盘锦124010

(Exploration and Development Research
Institute, Liaohe Oilfield Company, CNPC, Panjin
124010, China).

 辽河滩海地区多采用盐水钻井液及在钻井液中添加氯化钾，给油气层的解释和
评价带来很多困难。由于钻井液侵入造成电阻率曲线的数值大幅度下降，而加入的大量氯化钾
添加剂，导致中子测井的精度明显降低。应用高分辨率阵列感应测井最大限度地克服了因钻井
液侵入对电阻率曲线的影响，获得地层真电阻率及侵入深度，同时应用核磁测井计算束缚流体
和可动流体的孔隙度。提出了一套适合于滩海地区地质特征的油气层识别及测井评价方法，并
在应用中取得了较好的效果。

The brine drilling mud, which contains chlorination
potassium additive, will seriously influence the response of
well logging.It is more difficult for well logging to interpretation
and evaluation of hydrocarbon layers, because this kind of
mud was adopted widely in the foreshore area. After studying
the geology features and the drilling mud and logging data of
this area, it is revealed that the mud salinity is about 80 ~
140gramme per litre and the resistivity decreases greatly
because of the invasion of mud filtrate. There is a great deal of
chlorination potassium additive in the mud, which will affect
the accuracy of the neutron log and lower the precision of the
measurement. The Array Induction Log overcomes the
influence of mud filtrate invasion, and acquirs invaded depth
and the ture resistivity of the reservoir. On the other hand,the
Nuclear Magnetic Logging tool was applied to compute the
porosity of bounded fluid and movable fluid. In this paper, a
appropriate method was put up for the oil and gas reservoir
recognition and evaluation, and the better results have been
acquired in the practice..