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鄂尔多斯盆地中生界石油滚动勘探开发,经历了20多年的发展,逐步形成了独具长庆特色的侏罗系、三叠系、老油田滚动勘探开发三大技术系列。侏罗系滚动勘探开发技术主要是通过恢复古地貌和古水系,确定局部构造,并在有利的储集相带早期预测评价;三叠系滚动勘探开发技术是对以三角洲沉积体系控制的长3以上的三角洲平原分流河道砂体形成的构造—岩性油藏,采取细分沉积微相,确定有利储集相带,在与区域性鼻状构造匹配的部位进行滚动部署;老油田勘探开发技术是开展油藏精细描述,进行油田地质再认识,重新建立油层判识标准,结合油藏数值模拟技术,对已探明油田寻找滚动扩边潜力区或重新认识非主力油层。这些技术特别适用于小型隐蔽式岩性油气藏,并已在长庆油区取得了显著成果。
After more than 20 years of development, Mesozoic petroleum scrolls exploration and development in the Ordos Basin has gradually formed three major technical series of rolling exploration and development in the Jurassic, Triassic and old oil fields with Changqing characteristics. The Jurassic rolling exploration and development technology is mainly through the restoration of palaeogeomorphology and paleoclimate, to determine the local structure and early prediction and evaluation of the favorable reservoir facies belt; Triassic rolling exploration and development technology is based on the Yangtze River sedimentary system controlled by the length of 3 Above the tectonic-lithologic reservoirs formed in delta distributary channel sand bodies in the delta plain, subdivided sedimentary microfacies are identified to determine the favorable reservoir facies belt for rolling deployment at the site matched with the regional nose structure. The exploration and development technology of old oil fields Is to carry out a detailed description of the reservoir, re-understanding of the oilfield geology, re-establishment of reservoir identification criteria, combined with reservoir numerical simulation technology, to find the oil field has been expanding scroll potential area or re-understanding of the non-main reservoir. These technologies are particularly suitable for small, concealed lithologic reservoirs and have achieved remarkable results in the Changqing oil region.