用突变理论综合评价法优选完井方式

Well completion system optimum selection bycatastrophe theory comprehensive evaluating method

肖伟 吴晓东 韩国庆 王美强 李高峰 任月玲

XIAO Wei WU Xiaodong HAN Guoqing WANG Meiqiang LI Gaofeng REN Yueling

中国石油大学石油工程教育部重点实验室，北京　102249 玉门油田公司老君庙作业区，甘肃玉门　735200 华北油田公司第三采油厂，河北河间　062450 华北油田公司油藏评价部，河北任丘　062552

MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China Lao Junmiao Zone of Yumen Branch, Yumen 735200, China The Third Exploit Factory of Huabei Oilfield Company, Hejian 062450, China

完井方式的选择受多种因素影响，目前主要依据油气藏性质、井下作业及采油工艺要求定性选择，有必要建立完井方式选择的定量化指标和模型。通过应用突变理论综合评价的方法建立了完井方式优选模型。该模型通过建立完井方式综合评价指标体系，将技术指标、管理指标和经济指标作为影响完井方式选择的三大因素，并对各影响因素下的10 个指标参数进行量化和归一化处理，然后应用突变理论，对完井方式进行综合评价和筛选。该方法避免了模糊评价法、层次分析等方法中各权重由主观给定的弱点，各目标重要性的确定量化由各目标在归一公式中的内在机理决定，减少了综合评价中的主观性，评价更趋于实际，计算简便快捷。现场应用实例证明该模型对完井方案的优选具有指导意义。

Selection of well completion system is influenced by many factors. Nowadays, it is mainly quantitatively determinedby reservoir properties, downhole operation and requirements of petroleum engineering. It is necessary to give the quantified targetsand model. In this paper, a model of well completion system optimum selection which is comprehensively evaluated based on catastrophetheory was developed. Firstly, a global evaluation system is established including technical description, executive instruction andeconomic target. Then, 10 sub-indications are quantified and normalized. At last, all well completion ways are evaluated and selectedaccording to their values. This method averts the risk of deciding weight subjectively in the fuzzy rating and analytical hierarchy process.Its weights are given by their intrinsic mechanism in normalization. Therefore, the model has less subjectivity and more practical appraisaland faster computation speed. Field practice shows the model is of guide use for well completion system selection.