江苏复杂小断块中低渗油藏开发实践与认识

The Practice and Realization of Development of the Complicated, Small Fault Block,Mid-low Permeability Oil Reservoir in Jiangsu Oilfield

分析了江苏复杂小断块中低渗油藏的地质特征 ,认识到由于中低渗透、多油层、严重非均质、复杂小断块等原因 ,表现纵向、平面矛盾突出 ,非主力层动用状况较差 ,部分单元难于形成注采井网 ,地层压力水平较低等矛盾 ,主力层由于受到层间的影响 ,也有些水窜现象。针对这些开发中的主要矛盾 ,展开了相关的开发技术政策研究 ,寻找其合理的开发方式、层系组合界限、井距和注水时机等 ,提出了新油田采取早期乃至同步注水和老油田实施细分层注水开发试验 ,设计了跨油层组组合层系开发方案。通过实践均取得了明显效果 ,为严重非均质中低渗透多油层油藏开发积累了宝贵的经验。

By analyzing the geological characterizes of the complicated, small fault blocks, mid-low permeability reservoir in Jiangsu oil field, we realize, because of the mid-low permeability, multi-layers, serious heterogeneity, complicated-small fault blocks, etc., there are many developing characterizes such as outstanding conflicts among the vertical zones and on the horizontal zone , poor development status of non-dominant layers, poor well pattern , low pressure level and thief water flooding phenomena. In order to resolve the focusing problems, developing technology polices, rational developing style, combination limitation of multi-layer, interval among wells as well as water injecting occasion have been researched completely. Based on these research results, the development pilots such as the forepart or in-phase injecting water of the new oilfield, the subdividing injecting water of the old oilfield as well, had been put forward. Besides, the development project is designed with the combination zones spanning different oil layer groups. With the practice, great achievements and precious experiences have been acquired for the developing of mid-low permeability, seriously heterogeneity and multi-layer reservoirs.