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A new identification method for the longitudinal integrated shale oil/gas sweet spot and its quantitative evaluation
Author(s): 
Pages: 1337-1342,1360
Year: Issue:  11
Journal: Acta Petrolei Sinica

Keyword:  shale oil and gaslongitudinal integrated sweet spotquantitative methodlongitudinal integrated sweet spot indexlongitudinal integrated sweet spot coefficient;
Abstract: 页岩储层厚度一般较大,且储层物性纵向上非均质性强,长水平井多级压裂开发技术要求对水平井着陆点及轨迹进行优选.通过综合考虑页岩可压性、资源禀赋、流动性等因素,提出了页岩油气纵向综合甜点的概念,其是纵向地质因素与工程因素的综合.建立了页岩油气纵向综合甜点识别流程及方法,实现了纵向上从远景段、有利段、核心段,再到甜点段的识别过程.定义了纵向综合甜点指数,可以量化评价储层物性纵向分布的差异及非均质性.在此基础上,考虑地应力分布预估有效压裂裂缝高度,定义了纵向综合甜点系数,能够准确量化最优水平井着陆点,可以有效指导水平井靶点及轨迹设计,并且经过现场应用证明了该方法的有效性.
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