准噶尔盆地腹部Y1井区隐蔽圈闭识别研究

Identification of subtle traps in center of Junggar Basin.

准噶尔盆地腹部地区Y1井区位于车莫古隆起南翼,受车莫古隆起的控制,在K-J不整合之下广泛发育地层、地层-岩性型隐蔽圈闭。由于目的层埋藏深、储层单层厚度薄等因素,该区的隐蔽型圈闭复杂,识别工作面临着挑战。尝试使用了多种技术开展隐蔽圈闭识别与描述工作,逐步形成了一套利用钻井和高分辨地震资料,在精细地层对比和单井相划分的基础上,以沉积模式和成藏模式为指导,综合应用微断层识别、地震正演、地震属性分析和测井约束反演等技术手段,达到分析不整合面下的地层剥蚀线的展布范围、有利储集相带和砂体展布的目的,在此基础上总结了隐蔽圈闭识别的技术方法,同时探讨了隐蔽圈闭识别中技术应用存在的问题和前景。

Yl well field locates in the south of Chemo ancient uplift in Junggar Basin and is controlled by the uplift. Stratigraphic traps and stratigraphic-lithologic subtle traps are widespread under the unconformity of K - J. Because it is buried deep, and thin in single layer, identification of reservoir is challenging in this area. After testing with different techniques, we developed a suite of techniques suitable for identification of subtle traps. Based on detailed stratigraphic correlation and facies division in wells, we inferred the spread of stratigraphic erosion line, favorable reservoir facies belt, and distribution of sandstone under the guide of sedimentary patterns and reservoir models. Problems related to the applications of the techniques in identification of subtle traps were also dicusscd.