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牛心坨油田属于高凝稠油区块,主力开发层系为新生界下第三系沙河街组四段牛心坨油层,具有低孔低渗的特性,储层动用差异大。为了更加有效的缓解油层矛盾,提高水驱效率,针对牛心坨油层N1-3砂岩组进行了分析研究,在摸清剩余油的基础上,通过井网加密调整改善水驱控制程度,缩小井距、提高压力梯度使低渗透率油层充分动用起来,小井距开发在油田生产中后期取得了较好的成效。
Niuxintuo Oilfield belongs to a high-condensable heavy oil block. The main development strata are Niuxintu Oil Reservoirs of the 4th member of Shahejie Formation in the Third Cenozoic. They have the characteristics of low porosity and low permeability and large differences in reservoir utilization. In order to more effectively relieve the oil layer conflicts and improve the waterflooding efficiency, the N1-3 sandstone in Niuxintuo oil layer is analyzed and studied. Based on the remaining oil, the well control is improved by well pattern adjustment, Distance, pressure gradient to make full use of low permeability reservoir up, the development of small wells in the late oil production has achieved good results.