低渗透油田操作成本变化规律探讨

低渗透油藏地质条件复杂,开发难度较大,操作成本变化有其特有的规律.文章采用回归分析、边际分析和灰色关联度综合分析方法,并选取一个典型低渗透油藏,运用所提出的方法对其操作成本进行了实证分析,提炼出低渗透油藏操作成本的变化特征:累计操作成本分别与累积产液和累积产油之间存在立方关系;产液边际操作成本先上升后下降,其受井网调整等开发方式转变所引起的液量、含水变化影响明显;产油边际操作成本随着开发的推进呈现上升趋势,表明随着油藏开发采出程度的提高,产油边际操作成本不断上升;低渗透油藏压力对操作成本影响明显,表明注水对操作成本影响至关重要;采液速度和采油速度对低渗透油藏操作成本影响明显.

Approaching the Law of Variation with regard to the Operating Costs of Low-permeability Oil Fields

By using the methods of regression analysis, marginal analysis and a comprehensive analysis of gray relational grade, the paper conducts an empirical analysis on the operating costs of a typical low-permeability reservoir. It concludes the characteristics of the variation: there are cubic relations between cumulative operating costs and cumulative fluid production and cumulative oil production respectively; marginal operating costs of fluid production increased at first and then decreased, which has an remarkable change in the amount of liquid and water content caused by the adjustment of well net and the change of other development means; marginal operating costs of oil production present a rising trend with the promotion of the development, which shows that with the improvement of the recovery of the reservoir development, the marginal operating costs of oil production is increasing; the pressure of low permeability reservoir has an significant impacts on operating costs, which shows that the effect of waterflooding on operating costs is essential; both fluid producing speed and oil extraction speed have an significant impact on operating costs of low-permeability reservoirs.