陆相坳陷盆地烃源岩内致密砂岩储层含油性主控因素——以松辽盆地北部中央坳陷区齐家凹陷高台子油层为例

发布时间：2018-04-24 10:09

本文选题：陆相坳陷盆地 + 齐家凹陷　；参考：《沉积学报》2016年05期

【摘要】：松辽盆地北部中央坳陷区齐家凹陷青山口组高台子油层是典型的烃源岩内致密砂岩油。通过对储层宏观、微观含油性分析及含油性主控因素的深入研究,表明高台子油层储层含油性主要受沉积微相、成岩作用及烃源岩质量的综合控制,表现为有利沉积微相控制储层含油富集程度,河口坝、远砂坝微相砂体内大喉道发育,物性好,为致密油运移提供优势通道,同时储集空间相对发育,为致密油提供更广泛的聚集场所,油气最富集,沉积微相是控制高台子油层"甜点区"发育的关键地质条件。成岩作用控制石油差异分布,机械压实和胶结作用导致储层在油气大规模运聚之前普遍进入致密化,局部胶结作用弱的砂岩及溶蚀作用强烈的砂岩,大孔隙及大喉道发育,后期石油充注储层发生差异聚集,砂岩呈现不同的含油级别。烃源岩质量控制储层含油的普遍程度,好—最好烃源岩区油源充足、充注动力强,且就近运聚,虽然砂体薄,物性差,但砂体含油更普遍,含油物性下限低,差—中等烃源岩区砂体厚度大,物性总体较好,但受烃源岩质量及沉积、成岩作用综合控制,砂体含油普遍性差,主要以砂体中部物性好的层段含油为主,干砂层增多。甜点区主要分布在成熟烃源岩内部,纵向多套含油层系错叠形成甜点区连片分布,中北部含油砂体累计厚度大,物性好,向南部变差,计算甜点区资源1.5×10~8t,勘探前景良好。
[Abstract]:The high Taigan oil layer of Qingshankou Formation in Qijia sag, Qijia depression, northern Songliao Basin, is a typical tight sandstone oil in the source rock. Through the in-depth study of the reservoir macro, micro oil-bearing analysis and oil bearing main control factors, it is shown that the oil-bearing characteristics of the reservoir are mainly controlled by sedimentary microfacies, diagenesis and the quality of source rocks. As favorable sedimentary microfacies control reservoir oil enrichment, estuarine dam and far sand dam have large throat development and good physical property, which provide the dominant channel for dense oil migration, while the reservoir space is relatively developed, which provides a more extensive gathering place for dense oil, the most abundant oil and gas, and the sedimentary microfacies to control the development of the "sweet spot area" of the Gao Taizi oil layer. The key geological conditions. Diagenesis controls the distribution of petroleum differences, and the mechanical compaction and cementation result in the formation of dense reservoir before the mass accumulation of oil and gas. The same oil level. The quality of source rocks control the general degree of oil content in reservoir, good oil source in the best source rock area, strong filling power, and near migration and accumulation, although the sand body is thin and the physical property is poor, but the sand body is more common, the lower limit of oil and physical property, the large thickness of the sand body in the middle source rock area and the better physical property, but the quality and deposition of the source rock. In the comprehensive control of diagenesis, the oil-bearing universality of the sand body is poor, mainly in the good layer of oil in the middle of the sand body and the increase of dry sand. The dessert area is mainly distributed in the mature source rock, and the longitudinal multiple oil-bearing strata are stacked in the dessert area, and the accumulative thickness of the oil sand body in the middle and north part is large, the physical property is good, and the dessert is calculated to the south, and the calculation dessert is calculated. The resource of the area is 1.5 x 10~8t, and the prospect of exploration is good.

【作者单位】：大庆油田有限责任公司勘探开发研究院;
【基金】：国家科技重大专项(2011ZX05001-001) 中国石油天然气股份公司重大科技专项(2012E2603-01)~~
【分类号】：P618.13

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