基于地质信息构建虚拟井的自然伽马曲线

BUILT GR CURVE OF THE PSEUDO-WELL BASED ON THE GEOLOGICAL INFORMATION

为解决研究区内钻井稀少且分布不均、地质资料缺乏等问题,基于地质信息分析构建虚拟井的测井曲线。由于虚拟井的自然伽马信息主要由自然伽马趋势线(低频信息)、地质模型信息(中频信息)和天文周期辐射量变化得出的细节信息(高频信息)叠加得到,因此利用已有的地质资料及地质学、旋回地层学理论构建了虚拟井曲线。以利津洼陷内已钻井作为虚拟井构建的自然伽马测井曲线与该井实际曲线相似,证明基于地质信息分析构建虚拟井曲线的方法是可行的。

In order to solve the problems such as the scarcity and uneven distribution of the drilled wells and so on, on the basis of the analyses of the geological information, the pseudo-well curve is built. Due to the stacked pseudo-well GR logging information consists of three parts ： natural gamma trend line （ low-frequency formation ） ; geological model information （ intermediate-frequency information） and details of the astronomical period radiation change （ high-frequency information） , therefore with the help of the existing geological data, geology and cyclos- tratigraphic theory, the curve of the pseudo-well is built. The built natural gamma ray logging curve taking the drilled well in Lijin Low as the pseudo-well is the similar to the actual one of the well, thus the feasibility is proven for the curve buildin~ method based on the geological information analyses.