芦草沟组常规￣非常规油气成藏特征及模式
——以准噶尔盆地山前冲断带为例

Characteristics and models of conventional and unconventional hydrocarbon accumulation in Lucaogou Formation: a case study of piedmont thrust belt in Junggar Basin

李正强 田继军 琚宜文 韩长城 曾治平

新疆大学地质与矿业工程学院，新疆 乌鲁木齐 830017 中国科学院大学地球与行星科学学院，北京 100049 中国石化胜利油田分公司勘探开发研究院，山东 东营 257200）

School of Geology and Mining Engineering, Xinjiang University, Urumqi 830017, China College of Earth and Planetary Sciences, Chinese Academy of Sciences, Beijing 100049, China Exploration and Development Research Institute, Shengli Oilfield Company, SINOPEC, Dongying 257200, China

基于地质、地震及钻井等相关资料，文中深入分析了准噶尔盆地沉降￣沉积以及构造￣岩浆作用下二叠系芦草沟组优质烃源岩的展布及不同岩相类型的储层特征，系统地研究了盆地山前冲断带芦草沟组油气成藏特征及模式。结果表明：1）山前冲断带芦草沟组具有常规油藏、致密油藏和页岩油藏有序共生及油藏大面积连续分布的特点。2）平面上，由北部缓坡带到凹陷区，表现出常规油藏—非常规致密油藏—非常规页岩油藏有序分布的特征；纵向上，由下至上整体表现为页岩油藏到致密油藏和常规油藏，再到页岩油藏的分布特征。3）根据源储结构关系、油藏类型、岩相类型及其空间分布，山前冲断带芦草沟组油藏可分为“源储一体、源储紧邻、源储分离”3种成藏模式。

Based on geological, seismic and drilling data, the distribution of high-quality source rocks and reservoir characteristics of different lithofacies types in the Permian Lucaogou Formation under subsidence-deposition and tectonic-magmatism in the Junggar Basin were analyzed in depth. The characteristics and models of hydrocarbon accumulation in the Lucaogou Formation of the piedmont thrust belt of the basin were systematically studied. The results show that: (1) The conventional reservoirs, tight reservoirs and shale reservoirs of the Lucaogou Formation in the piedmont thrust belt had the characteristics of orderly symbiosis and large-area continuous distribution of reservoirs. (2) The plane from the northern gentle slope to the sag, showing the characteristics of orderly distribution of conventional reservoirs-unconventional tight reservoirs-unconventional shale reservoirs; and from bottom to top, the performance was vertically shale reservoir-tight oil, conventional reservoir-shale reservoir characteristics. (3) The reservoirs of Lucaogou Formation in piedmont thrust belt can be divided into three hydrocarbon accumulation models of source-reservoir integration, source-reservoir adjacent and source-reservoir separation according to the relationship of source-reservoir structure, oil reservoir type, lithofacies type and its spatial distribution. 

10.6056/dkyqt202206006