轮台北1号凝析气藏低阻油气层成因及识别

Origin and identification of low-resistivity oil and gas reservoirs in no.1 structure, north of Luntai condensate gas reservoir

姚田万 吕萍 马海虎 徐士胜 吴剑

Yao Tianwan Lü Ping Ma Haihu Xu Shisheng Wu Jian

中国石化 西北油田分公司 雅克拉采气厂, 新疆库车 842017

Yakela Oil & Gas Exploitation Factory, SINOPEC Northwest Company, Kuqa Xinjiang 842017, China

轮台北1号构造古近系凝析气藏受构造、储层、成藏条件的影响,其油气储层电阻率为1.3 Ω·m,比白垩系巴什基奇克组气藏水层电阻率(2 Ω·m)低,导致勘探开发早期忽视了工区内低阻油气层的存在.通过分析轮台古近系低阻油气层的形成原因,建立了低阻油气层与水层的新识别标准,指导了YL2井区古近系凝析气藏的重大发现.

Influenced by structures, reservoirs and accumulation conditions, the resistivity of the Paleogene condensate gas reservoir in the no.1 structure of the northern Luntai condensate gas reservoir was 1.3 Ω·m, which was lower than that of aquifers in gas reservoir of the Bashijiqike Formation in Cretaceous by 2.0 Ω·m. It led to the neglect of low-resistivity reservoirs in early exploration. The origin of low-resistivity oil and gas reservoirs in Paleogene in the Luntai area was studied. A new identification standard to distinguish low-resistivity reservoirs and aquifers was established, which led to a great discovery of condensate gas reservoir in Paleogene of well YL2.

https://doi.org/10.11781/sysydz2014S1089