基于模糊综合评判法的油田水驱开发效果评价

Evaluation of Oilfield Water Flooding Development Effect Based on the Fuzzy Comprehensive Evaluation Method

目前针对水驱开发油藏开发效果评价仅仅是针对单一指标的描述,而不能综合地考虑多方面因素的共同作用。为此,建立一套综合的水驱开发效果评价体系指导油田科学合理地开发就十分必要。在此运用模糊数学中的模糊综合评判法,给出模糊综合评判的基本步骤,将模糊综合评判法与层次分析法相结合,建立水驱开发效果评价体系。根据油藏的实际生产状况,筛选出水驱储量控制程度、水驱动用程度、地层能量保持水平、含水上升率、水驱采收率、剩余可采储量采油速度、井网密度共七项指标,将指标的等级描述定量化,分析X油田各项指标的优劣程度,对X油田整体开发效果进行评价。根据评价结果,指导其进行开发措施的调整。实际应用分析表明,模糊综合评判法操作方法简单,评价结果清晰可靠,具有广泛的适用性。

Until now, the evaluation of water flooding oilfield development effect is in allusion to single indicator which can not consider the combined effect of the various factors. Considering this, it is essential to establish a set of comprehensive water flooding development effect evaluation system to guide the oilfield development scientifically and reasonably. Therefore, the fuzzy comprehensive evaluation method was used to establish a development effect evaluation system for water flooding reservoir by pointing out its basic steps and combining it with analytic hierarchy process. Based on the actual production status of the reservoir, seven indicators were screened out, and the level description of these indicators was quantified to analyze the quality of each indicator of X oilfield and evaluate the overall development effect. According to the results, the development measures were adjusted. The analysis shows that, the fuzzy comprehensive evaluation method is simple, and its evaluation results are clear and reliable, therefore, it has a wide range of applicability.