孤东油田薄层边际油藏特征及挖潜研究

Study on characteristics and potential tapping of thin layer marginal reservoir in Gudong Oilfield

利用地质与开发相结合的研究方法,对孤东油田馆上段4^(5)砂组薄层边际油藏的地质特征与开发特征开展了研究,并制定了相应的开发技术对策。研究认为,在开发过程中,需要通过完善井网提高薄层整体动用,储层改造提高渗透能力,单层开采避免层间矛盾,分层注聚强化薄层注入,加强薄层水平井开发。通过以上“四项原则”,建立以水平井单层注采为主线,稠油薄层注汽吞吐、稀油薄层强化注水的开发政策,实施后获得了近千万吨的薄层边际油藏推广储量。

Geological characteristics and development characteristics of thin layer marginal reservoir of the 4^(5) sand group of upper Guantao formation in Gudong oilfield were clarified through the research method of geology and development combination,and the appropriate development technical countermeasures are formulated.The results indicate in the process of development it is necessary to improve the overall development of thin layer by improving the well pattern,improve the permeability ability by reservoir reconstruction,avoid the conflicts between layers by single-layer production,strengthen the injection of thin layer by separate layer polymer injection,and strengthen the development of thin layer horizontal wells.According to the above four principles,the development policy of single layer injection and production of horizontal wells as the main line,thin layer steam stimulation of heavy oil and thin layer enhanced water injection of thin oil was established.After the implementation,nearly ten million tons of thin layer marginal reservoir reserves were obtained.