北大港油田低阻油气层解释评价方法研究

在油田滚动勘探开发过程中,通过油气层评价不断发现新的油气藏是大港油田近年来增储上产的重要途径之一。本文以老井复查为基础,对低阻油气层的分布、成因、及评价方法进行了探讨和总结,明确了北大港低阻油气层主要分布在明化镇、馆陶和东营组及滨海地区的沙河街组,确立了低阻的成因主要是受泥浆侵入和岩性因素影响;提出了不同成因类型低阻油气层解释评价的适用方法,并通过应用实例对评价效果进行了分析,其研究成果对提高该区油气层复查的成功率会有一定的借鉴作用。

The interpretation and evaluation method of low resistivity layers in North Dagang oilfield

In the process of progressive exploration and development, the new oil and gas layers have being found by reexamination and evaluation in the old wells, which is an important method to increase reserves and production of Dagang Oilfield in recent years. On the basis of reviewing old wells, the distribution, origin and evaluation method of low resistivity reservoirs is discussed and summarized in this paper. It is defined that low resistivity layers in North Dagang region are mainly distributed in Minghuazhen,Guantao,Dongying and Shahejie group. It is also confirmed that the cause of low resistance is mainly affected by mud invasion and lithologic factor. Then the interpretation and evaluation method for different low resistance types is put forward, and the evaluation effect is analyzed through application examples. The research achievement is a good reference for improving the success rate of reviewing oil and gas layers.