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张渠作业区位于安塞油田的三角洲上,下倾方向为延长组,钻遇的地层自上而下分别为第四系、第三系、白至系、侏罗系,其中侏罗系包括安定组、直罗组、延安组、富县组,三叠系包括延长组。长2层构造比较弱,发育的三级构造—鼻状隆起,该油层含油性比较差,主要特点是低渗透,储层主要以原始粒间孔隙为主,浊沸石溶孔则由东向西减少,然后消失。张渠油区长2油层组自正式投入开发以来,距今只有短短的10年的开发历程。先后经历了天然能量的开发、边缘注水的开发以及边内注水开发、边部注水加内部点状注水开发等四个阶段。
The Zhangqu operation area is located on the delta of Ansai Oilfield and the dip direction is Yanchang Formation. The formations encountered are the Quaternary, Tertiary, Paleolithic and Jurassic systems from top to bottom, of which the Jurassic includes Anding group, Zhiluo group, Yan’an group, Fuxian group, Triassic group, including Yanchang group. The structure of the second and the second layers is relatively weak, the developed tertiary structure - nasal uplift, the oil layer is relatively poor, the main characteristic is low permeability, the reservoir mainly dominated by intergranular pores, pore lavas zeolite from east to west Reduce, then disappear. Zhangqu oil zone 2 reservoir group since formally put into the development, only a short span of 10 years of development history. It has successively experienced the development of natural energy, the development of edge water injection, the development of edge water injection, the development of edge water injection and the development of internal point water injection.