长庆油田陇东地区延长、延安统油层,通过地面露头和岩心观察以及试油压裂资料都证明,压裂后在地层中形成的裂缝是垂向的网状裂缝,而且其裂缝形状主要受地层的原生裂缝形状所控制。地层岩性的变化既控制了原生裂缝,也不同程度的限制了压裂裂缝的发展。这个问题无论对搞压裂工作或搞油田开发工作的同志都应当引起足够的重视。一、延长、延安统地层露头裂缝产状 The Chang’an and Yan’an formation reservoirs in the Longdong area of ​​Changqing Oilfield show that the fractures formed in the strata after fracturing are vertical reticular fractures through the observation of surface outcrops and core and the test-hydraulic fracturing data. The fracture shape is mainly affected by The formation of the original crack shape control. Changes in lithology both control the original fracture, but also to varying degrees, the development of fracturing. This issue deserves enough attention whether it is for comrades engaged in fracturing or oilfield development. First, to extend the Yan’an stratum outcrop cracks