海上油田矢量井网研究初探

A preliminary study of vector well patterns in offshore oilfield

海上油田开发中井的类型和布井方式均比陆上油田更为复杂。为了优化井网结构,实现经济技术开采最优化,引入了矢量井网的概念,将影响井网布置的地质、开发及经济因素视为该向量空间的一组向量。一方面通过模糊评判技术确定适合布井的目标区域,另一方面通过对典型油藏单井及井网开发指标计算方法的研究,建立各个向量之间的定量联系;以此为基础,应用随机模拟和模糊优化技术实现多向量的井网整体优化。该技术在埕岛油田一区馆上段油藏进行了有限区域、有限层数和有限影响因素的探索性应用,初步证明了该方法的可行性,为今后的井网整体优化奠定了基础。

In the development of offshore oilfield,the well type and well pattern will be more complicated than that of onshore oilfield.In order to optimize well pattern structure and optimize the development process economically and technically,the conception of vector well pattern is introduced.All of the geological,developed and economic factors,which influence the well pattern,are taken as variables in vector space.On one hand,the optimal drilling target areas are determined by fuzzy evaluation method;on the other hand,the relationship among those vectors is built by studying the calculation method of development index in single well and well patterns of the typical oil reservoirs.Based on the above two studies,the overall optimization of vector well patterns is realized by applying stochastic simulation and fuzzy optimization methods.The method is applied in upper Guantao Formation,No.1 area,Chengdao Oilfield with limited areas,limited layers and limited influencing factors.It proved the feasibility of this method and set up the foundation for the overall well pattern optimization in larger areas,more layers and more influencing factors.