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针对新疆塔里木盆地已探明的油气资源量仅为预测总量的2.5%这一严峻现实,西北石油局的石油地质专家日前指出,忽视下古生界碳酸盐岩自生自储油气藏勘探是造成近些年来石油地质储量增加缓慢的重要原因,塔里木盆地下古生界碳酸盐岩是寻找北非利比亚式大型油气田的主攻目标.石油地质专家对下古生界碳酸盐岩油气藏的认识源于沙参2井的油气突破.1984年9月.西北石油局在塔里木盆地北部雅克拉构造奥陶系碳酸盐者实现了举世瞩目的重大油气突破.沙参2井初始日产原油达1000t左右、天然气420万m~3.以后的一系列科技攻关证实,下古生界寒武、奥陶系是塔里木盆地的主力生油气层.由于对下古生界的认识尚不全面,并且深井钻探的投资和勘探风险较大,加之对碳酸盐岩储层的非均质性难以把握等,塔里木盆地石油勘探逐步由深部向中浅部转移,因此,“七五”后期到“八五”期间,塔里木盆地石油勘探的重点是在中、新生界,而不是古生界.
In view of the grim reality that the proven reserves of oil and gas in the Tarim Basin in Xinjiang are only 2.5% of the total predicted, the experts of petroleum geology of Northwest Petroleum Administration recently pointed out that it is neglected that the exploration of carbonate rocks in the Lower Paleozoic during the spontaneous self-storage is The important reason for the slow increase of petroleum geological reserves in recent years is that the Lower Paleozoic carbonate rocks in the Tarim Basin are the main targets for finding large-scale Libya-type large-scale oil and gas fields in North Africa.Petroleum geologists’ understanding of the Lower Paleozoic carbonate reservoirs Oil and gas breakthrough from the Shashen 2 well September 1984 Northwestern Petroleum Bureau in the northern Tarim Basin Yakela structure Ordovician carbonate who achieved world-renowned major breakthroughs in oil and gas. Shushan wells 2 initial Nissan crude oil up to 1000t About 4.2 million m 3 of natural gas after a series of scientific and technological research confirmed that the Lower Paleozoic Cambrian Ordovician is the main oil and gas layer in the Tarim Basin due to the understanding of the Lower Paleozoic is not comprehensive and deep Due to the large investment and exploration risk in drilling and the difficulty in grasping the heterogeneity of carbonate reservoirs, the oil exploration in the Tarim Basin gradually shifted from deep to mid-shallow. Therefore, By the “Eighth Five-Year Plan” period, the oil exploration in the Tarim Basin will focus on the Meso-Cenozoic and not the Paleozoic.