曙光油田水淹层测井解释方法研究

发布时间：2018-06-27 03:39

本文选题：组合梯度模型 + 水淹层　；参考：《东北石油大学》2015年硕士论文

【摘要】：曙光油田开发进行四十年,目前进入高含水阶段,注入水使得储层中的油水关系发生很大变化,其四性关系也发生变化,从而导致测井响应变得多样性。有许多储集层在测井曲线上具有相似变化,但是水淹状况却存在较大差异,使得水淹层测井解释工作更加的困难,薄差层水淹层解释精度始终达不到很好地效果,使油田注水开发等工作的难度上升,成为制约油田发展的因素。因此,水淹层测井解释精度的提高是曙光油田在新时代面临的一个相当重要而且急需解决的问题。针对这一情况,本文通过对曙光地区中后期水淹层的密闭取心资料和测井资料响应特征等进行研究,结合组合梯度的方法,成功地实现对储层水淹的定性评价;再使用双地层水电阻率模型及泥质砂岩体积模型,进行储层参数求取,进一步完成对曙光油田“先定性,后定量”的水淹解释。克服了通常情况下泥质含量和地层水电阻率计算不准确这一难题。使用本文建立的组合梯度模型以及电阻率模型处理实际井资料,与岩心分析结果等对比研究,完成对水淹层评价。结果表明,此种方法有利于提高水淹层解释精度,实现定性定量解释。
[Abstract]:The development of Shuguang Oilfield has been going on for 40 years, and now it has entered into the stage of high water cut. The oil-water relationship in the reservoir is changed greatly by injecting water, and the four-sex relationship is also changed, which leads to the diversity of logging response. Many reservoirs have similar changes in logging curves, but there are great differences in water flooding, which makes logging interpretation more difficult, and the interpretation accuracy of thin and poor reservoirs is not good. The difficulty of oilfield water injection development is increased, which is a factor restricting oilfield development. Therefore, the improvement of logging interpretation accuracy is a very important and urgent problem for Shuguang Oilfield in the new era. In view of this situation, this paper studies the response characteristics of closed coring data and logging data of waterflooded layer in the middle and late period of Shuguang area, and combines the method of combination gradient to realize the qualitative evaluation of reservoir waterflooding successfully. Then using the water resistivity model of double formation and the volume model of muddy sandstone, the reservoir parameters are obtained, and the water flooding interpretation of Shuguang Oilfield is further completed. The problem of inaccurate calculation of mud content and formation water resistivity is overcome. The combined gradient model and resistivity model are used to deal with the actual well data, and the results of core analysis are compared with each other to evaluate the water-flooded zone. The results show that this method is helpful to improve the interpretation accuracy and realize the qualitative and quantitative interpretation.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.81;TE357.6

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