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为了揭示大牛地气田上古生界山1段至盒3段低孔低渗储层物性差异的主控因素沉积相的作用,采用实验和统计分析相结合的方法,从岩石矿物成分、泥质质量分数、岩石粒度、砂岩厚度等方面综合分析沉积相对储层的控制特征.研究结果表明:最为有利的沉积相为曲流河分流河道相,其次为辫状河分流河道相,再次为三角洲分流河道相,最后为泛滥平原相等.对应物性最好的层段为盒3段,其次为盒2段、盒1段,而山1段、山2段最差.研究结论对于大牛地气田下一步的天然气勘探开发具有一定的参考.
In order to reveal the role of sedimentary facies as the controlling factor for the difference in physical properties of the low porosity and low permeability reservoirs from the 1st to the 3rd member of the Upper Paleozoic in the Daniudi gas field, a combination of experimental and statistical analysis was used to study the effects of rock mineral composition, The results show that the most favorable sedimentary facies are the meandering distributary channel facies, followed by the braided channel distributary channel facies, and again the delta diversion The channel facies and finally the flood plains are equal, the best corresponding layers are box 3, followed by box 2, box 1, and mountain 1, and mountain 2. The conclusions are as follows: For Daniudi gas field A step of natural gas exploration and development has some reference.