Well sites in oilfieds occupy a larger proportion of oil and gas project construction land-scale,so it has an important significance for cost control to the oil and gas field enterprise if the land use pattern of the well site is optimized. the dry farmland and the grassland are taken as an example to es-tablish the model which can be used to evaluate land cost by taking the way of one-time all permanent expropriation or part of the permanent expropriation. In the end, the land cost control critical value on the oil recovery well site and the water injection well site is fourd. Evaluation results show that it is economically more viable by taking the way of part of the permanent expropriation and part of the tem-porary requisition when the production cycle is less than the critical value, or by taking the way of one-time all permanent expropriation when the production cycle is higher than the critical value. The way of one-time all permanent expropriation or part of the permanent expropriation is not suitable for the oilfield which has high working frequency and a big amount of wells. The difficulties on business process should be considerated as well as the land being occupied by famers around when the way of one-time all permanent expropriation or part of the permanent expropriation is used.%油田井场用地在油气项目建设用地规模中占有较大的比例,做好井场用地方式的优化工作,对油气田企业控制成本具有重要意义.以占用旱地和草地为例,建立了油田井场一次性全部永久征收方式和部分永久征收、部分临时征用方式的用地成本评价模型,计算出油井井场和水井井场分别占用旱地和草地的用地成本控制临界值,对不同用地方式的优缺点进行了评估.成本评价结果表明:生产周期小于临界值的井场,采取部分永久征收、部分临时征用的方式在经济上更可行;生产周期大于临界值的井场,采取一次性全部永久征收方式在经济上更可行.对井下作业频率高、井数总量大的油田,井场用地不适宜采用部分临时用地、部分永久征收的方式;同时对采取部分临时征用、部分永久征收的用地方式应评估临时用地手续办理的难度和被征地农民抢栽、抢种行为对生产的影响.
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