长庆西峰油田录井综合解释实例

Samples of comprehensive mud logging interpretation method applied in Changqing Xifeng Oilfield

针对长庆西峰油田储集层低孔隙度、低渗透率的特点,从储集层物性、地化、荧光图像和定量荧光4个方面介绍了油水层录井综合解释标准;以X201井和N25井为例阐述了储集层解释评价的具体内容;着重探讨了单项录井方法按解释标准解释出现矛盾时,如何进行具体分析。通常解释标准参数值取平均值,因此其前提必须是在考虑岩石物性条件下确定好井段的取值范围,细分层位,而后再按标准进行解释。应用长庆油田油水层解释标准,在2005年所钻的6口探井10个层位的现场应用中,其解释符合率达到80%,证明了综合解释方法的可行性和可靠性。

In view of the features of reservoirs in Changqing Xifeng Oilfield with low porosity and low permeability, from the aspects of reservoir physical properties, geochemical log, fluorescence images and quantitative fluorescence, the paper introduces comprehensive mud logging interpretation criteria for oil-water layers. Taking wells X 201 and N 25 as examples, the paper expounds the specific contents of reservoir interpretation and evaluation, and puts emphases on how to make specific analyses for the contradiction of different result interpreted with individual mud logging method according to the interpretation criteria. Usually the averages of the interpretation criteria parameter values are adopted, so the premise must be that, with consideration of the rock physical properties, numeric range for the intervals are determined, the horizons are subdivided, and then interpretation is made according to the interpretation criteria. In 2005, oil-water layer interpretation criteria for Changqing Oilfield were applied to tens of horizons of six exploration wells, the interpretation coincidence rate were more than 80 percent, it proved the feasibility and reliability of it in Changqing Xifeng Oilfield.