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13个区块的三维大连片资料显示柴达木盆地西南部(简称“柴西南”)现今存在红狮、扎哈泉、阿拉尔和切克里克等4个主要凹陷(或次级凹陷)。通过对凹陷构造演化和生烃潜力分析,认为红狮凹陷、扎哈泉凹陷和切克里克东凹陷为早期持续沉降凹陷,发育古近系—新近系厚度较大的优质烃源岩,生烃潜力大。同时,结合油源对比和油气分布指出,柴西南具有大凹陷局部生烃中心,油气“环凹近源”聚集的特征,预算红狮和扎哈泉—切克里克2个生烃中心资源量为8.86×108t,临近生烃中心长期持续发育的七个泉—砂西、跃进、乌南、昆北等古鼻状凸起及外围斜坡带,不但有红狮凹陷和扎哈泉—切克里克凹陷2个生烃中心为其提供充足的油源,而且继承性发育多个三角洲沉积体系前缘相带、滨浅湖滩坝优质储砂体,源储配置好,是岩性、岩性—构造油气藏勘探的有利区带。
The data of the three-dimensional Dalian section of the 13 blocks show that there are four major depressions such as Red Lion, Zaha Spring, Alar and Cecrick in the southwestern part of the Qaidam Basin (or “Chaixi Nan”) Depression). Based on the analysis of the evolution of tectonic evolution and hydrocarbon generation potential, it is considered that the Hongshi sag, the Zhahaquan sag and the Cecliq sag sag are the early persistent subsidence sags, and the Paleogene-Neogene high-quality source rock Hydrocarbon potential. In the meantime, according to the comparison of oil source and the distribution of oil and gas, it is pointed out that the southwestern Qaidam has the characteristics of local hydrocarbon generating centers in large depressions, accumulation of oil and gas “near concave source ”, budget Red Lion and Zhahaquan- The center of resources is 8.86 × 108t, near the long-term continuous development of hydrocarbon generation center - sand, Yuejin, Wunan, North and other ancient nose-like bumps and peripheral slope zone, not only Hongshi sag and Zaha Spring - Two hydrocar- bon centers in Chekker Sag provide them with sufficient oil source, and inherit multiple delta sedimentary system front facies belts. Sexual, lithologic - favorable zone for structural exploration of oil and gas reservoirs.