Return to petroleum geology of Ordos Basin
Return to petroleum geology of Ordos Basin
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DOI：
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发表时间：
2004
影响因子：
7.5
通讯作者：
L. De-sheng
中科院分区：
文献类型：
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作者：
L. De-sheng
鄂尔多斯盆地是一个多旋回叠合盆地，面积约32×104 km 2。厚的古生代沉积物通常保持近水平的地层。盆地勘探开发的4个含油气系统均为地层岩性油气藏：上三叠统延长组特低渗砂岩油气藏;下侏罗统延安组中低渗砂岩油气藏;下奥陶统马家沟组低渗碳酸盐岩气藏;下二叠统山西组和下石盒子组低渗河流相砂岩气藏。从1907年在延长市西部钻开第一口陆上生产井至今，延长油田的勘探开发已有100年左右的历史。随着浅层特低渗透油藏勘探开发的不断深入，延长油田2003年底原油产量达到230× 104 t/a，累计产油1321× 104 t。延安、榆林两县14个钻采公司年产原油330× 104 t，累计产油量1301×104 t。长庆石油勘探局2003年石油产量701×104 t，累计石油产量6489× 104 t。截至2003年底，鄂尔多斯盆地已探明威尔斯油井2×104口，年产原油1262× 104 t，累计产油量9121× 104 t。
Ordos Basin, a polycyclically superimposed basin, covered about 32×104 km2. Thick Phanerozoic sediments generally maintained sub-horizontal strata. The four petroleum systems explored and developed in the basin are all stratigraphic-lithologic reservoirs: super-low-permeability sandstone reservoirs of Yanchang Formation, Upper Triassic; middle-low permeability sandstone reservoirs of Yan'an Formation, Lower Jurassic; low-permeability carbonate gas reservoirs of Majiagou Formation, Lower Ordovician; and low-permeability fluvial sandstone gas reservoirs of Shanxi and Lower Shihezi Formation, Lower Permian. Since the drilling of the first onshore production well in western Yanchang City in 1907, the Yanchang Oilfield has been explored and developed for about 100 years. Due to the exploration and development progress for the shallow super-low permeability reservoirs, the crude oil production of Yanchang Oilfield reached 230×104t/a and its cumulative oil production reached 1321×104t by the end of 2003. The oil production of 14 drilling-production companies under the Yan'an and Yulin local county reached 330×104t/a and its cumulative oil production reached 1301×104 t. The oil output of Changqing Petroleum Exploration Bureau, CPNC, was 701×104 t in 2003 and its cumulative oil production reached 6489×104t. By the end of year 2003, there are 2×104 oil wells in the Ordos Basin, the oil production rate reached 1262×104t/a and its cumulative oil production was 9121×104t.