多矿物模型在碳酸盐岩岩性解释中的应用——以鄂尔多斯盆地Y地区马家沟组为例

Application of Multi-mineral Model in the Lithologic Interpretation of Carbonate Rock——Taking Majiagou Formation in Y Area of Ordos Basin as a Case

碳酸盐岩属于复杂岩类,其矿物组分多样,岩石结构复杂,测井响应微弱,利用单一的常规测井曲线解释碳酸盐岩岩性的结果常具多解性甚至难以识别。而多矿物模型则是以最优化解释为目标,在充分利用已有的测井信息的基础上,能够识别出多种矿物组分类型及其相对含量,从而到达较为准确识别碳酸盐岩岩性的目的。本文阐述了多矿物解释模型的原理、特点及其在碳酸盐岩岩性解释中的优势,并利用实例对模型进行了验证,取得了良好的效果。结果表明,多矿物模型是进行碳酸盐岩岩性解释的有效方法。

It is multi-explanative and even more difficult to use conventional logging curves to interpretate the lithology of carbonate rocks because of various mineral compositions, complex rock structures and faint log responses of carbonate rocks which belong to the complex rocks. And multi-mineral model can identify various mineral compositions and their relative contents, so it can be used to identify the lithology of carbonate rocks correctly based on logging information. In this paper, the principle, characteristics and advantages of the multi-mineral model were introduced as well as its application in interpretating the lithology of carbonate rocks. The model was verified by some examples, good results were achieved. The results show that the multi-mineral model is an effective method to interpretate the lithology of carbonate rocks.