实现中原油田最小成本优化配产的四维决策单纯形规划法

An Assignment Optimization Model to Get Minium Cost in Zhongyuan Oilfield by Using Simplex Method in Four-Dimensional Space

中原油田原油生产计划实际上是一个地质配产方案，在近期内资金缺乏、储量不足的双重困扰下，解决这一矛盾的出路在于尽可能合理地利用资金和现有已掌握的可采储量。本文从油田开发生产成本分析入手，建立成本最小模型。在成本最小优化模型中，把产液量、产油量、生产井数和注水井数作为配产规划指标，经多元回归成本关系后进行优化。通过对1991年油田分厂配产结果表明，其配产量比“八五”规划指标要低，但接近该年的实际生产指标，配产后总成本有所下降。文章基于中原油田开采近十年的经验，统计分析了大量矿场资料，认真研究了油藏开采规律，运用油藏工程、经济评价和系统工程方法，建立起中长期适应不同类型油藏的实现最小成本四维决策单纯形优化配产模型，为中原油田制定“九五”开发规划提供了方法和决策支持手段。

A new method to optimize the development programme of oil production is presented through analysis of the practical experience of Zhongyuan Oilfield. Production assignment conlusions can be drawn as follow:A minimized cost model is constructed on the basis of analysis of production cost in reservoir development. The production of liquid, oil and the number of production wells is optimized as assignment plan objects after multi-eielement regression of cost relation. The assigned productions to production factories in 1991 are lower than the objects of eighth five year plan, but near the practical data of that year, and the total cost decreased to some degree.The destination of production prediction is to determine the production trend of old wells and production condition. The production of old wells is the part of production whose cost is fairly low. The investment of new wells and operations can belaved if the old wells are fully utilized, which will allow more investmenton operation to improve the potential capacity of production. Thus the prediction result of old well production can be treated as the low limit in the assignment optimization model.The situation of Zhongyuan Oilfield has been very serious since 1988 due to the reservolr management and economlc analysis as well as the inflution in raw materials and unreasonable oil price. The assignment optimization of oil production must be reinforced after the enterprices enter market, because the development programmme of Zhongyuan Oilfield is really a production assignment plan in geological sense.The assignment optlmization model and the research method of practical example presented in this paper can be acted as a reference in the analysis and plan of oil production system in Zhongyuan Oiifield in the future.