基于不确定理论的压裂压后综合评估技术

水力压裂是油气藏增产的重要措施， 压裂工艺技术发展、 应用至今， 还没有一种方法能够既经济又准确地评估水力裂缝。针对现有各种评估技术 （直接诊断技术和间接诊断技术） 评估结果具有多样性、 不确定性以及技术本身的不成熟性等不足， 探索了压后综合评估技术； 对有关压裂参数 （裂缝长度、 裂缝宽度、 裂缝高度、 压裂液综合滤失系数、 裂缝导流能力、 裂缝闭合压力等） 提出了基于不确定理论的综合评估模型及求解方法。由于综合了各种技术的评估结果 （确定、 模糊和灰性的信息） ， 最终可获得客观的评估结果。实例表明该模型是有效的和实用的。

The Technology of Comprehensive Evaluation after the Fracturing Based onUnascertained Mathematics Theory

With the development and application of hydraulic fracture technology， a method which could evaluatethe underground hydraulic fracture economically and properly is urgently needed on the spot. As the results of thecurrent various technical assessment are uncertainties， inconsistencies and the immaturity of the technology itself，this paper has researched on the comprehensive evaluation problem of hydraulic fracturing， put out the model tocomprehensively evaluate the associated fracturing parameters， such as the fracture length， the fracture height，the fracture width， the fracture conductivity， the fracture closure pressure， the comprehensive fracturing fluid losscoefficient， etc. and offered the solutions of the model which takes the various certainty information， uncertaintyinformation， fuzzyinformationandgreyinformationallintoconsideration. Atlast， theapplicationisalsodiscussed，and its effectiveness and practicality have been showed by examples.