地质助探
天然气勘探与开发
2017年9月出版
准噶尔盆地东道海子凹陷北斜坡上二叠统梧桐沟组
储集层成岩作用与孔隙演化李斌连丽霞雷海艳马聪陈俊
中国石油新疆油田公司实验检测研究院
油气新发现。复杂成岩作用的改造决定了岩石物性和孔隙结构的演化，利用岩石薄片、铸体薄片、扫描电镜、X射线衍射等微观实验分析技术对东道海予四陷北斜披上二叠统梧桐沟组进行成岩作用研究，
划分成者阶段，并定量计算各阶段孔隙的改变量，明
确孔隙度降低的主要影响因素。研究结果认为：①梧桐沟组成岩作用主要包括压实作用、胶结作用、交代作用及后期的溶蚀作用，目前主要处于中成岩A期；②压实减孔是梧桐沟组孔隙度损失的主要原因，平均减少23.59%，胶结作用所损失的孔隙度平均为 3.30%，溶蚀作用较弱，平均增加孔隙度为2.36%：
①叠后相干能量梯度属性方法裂缝预测认为梧制沟组裂缝发育区与构造断累
特征有相关性：①有利储层受岩性、构造作用、成岩作用共同控制，滴南8井扇三角洲前缘断块群为有利储层发育区。该研究成果对该区下一步的赖探开发工作具有指向作用。
准噶尔盐地东遂海子凹陷
关键词
晚二叠世
DOl: 10.12055/gaskk.issn.1673-3177.2017.03.003
梧桐组
储层
成岩作用
孔隙演化
储层有利区
DiagenesisandporeevolutionofUpperPermianWutonggouFormationreservoir
inthenorthslopeof DongdaohaiziSag,theJunggarBasin
Li Bin, Lian Lixia, Lei Haiyan, Ma Cong, Chen Jun
(Research Institute of Experiment andDetection,PetroChinaXinjiangOilfield Company,Karamay,Xinjiang 834000 China)
Abstract: In the Dongdaohaizi Sag, the Junggar Basin, hydrocarbon resources are quite abundant and tectonic setting is favorable The prediction of high quality reservoir plays an important role in the well location selection and the new oil and gas discovery. The petrophysics and pore evolution are dominated by the reworking of complex diagenesis. In this paper, the diagenesis of Wutonggou Formation in the north slope of Dongdaohaizi Sag was analyzed and divided by using petrographic thin section, cast thin section, SEM and X ray diffraction. Then, the variation of porosity in each stage was calculated, and the main factors leading to the reduction of po rosity were confirmed. It is indicated that the diagenesis of Wutonggou Formation mainly includes compaction, cementation, replace-ment and later denudation. At present, it is at stage A of middle diagenesis. Compaction is the main cause for the reduction of porosity of Wutonggou Formation, making the porosity reduce averagely by 23.59%. The porosity reduction caused by cementation is 3.30% on average. Denudation is weaker, and it increases the porosity by 2.36% on average. Fractures were predicted by means of post-stack coherent energy gradient attribute method, indicating that the fracture development zone of Wutonggou Formation is correlative with fracture characteristics of structures. Favorable reservoirs are controlled jointly by lithology, tectonics and diagenesis. The fault block groups of fan delta front in Well Dinan 8 are the favorable reservoir development areas. The research results can be used as the refer-ence for the future exploration and development in this area
Keywords: Junggar Basin; Dongdaohaizi Sag; Late Permian; Wutonggou Formation; Reservoir; Diagenesis; Pore evolution; Favorable reservoir area
第一作者：李斌，1987年生，2013年毕业于长江大学矿产普查与勘探专业，工程师，硕士；主要从事沉积、储层方面的研究工作。
地址：（834000）新强维吾尔族自治区克拉玛依市克拉玛依区胜利路街道实验检测研究院。E-mail：libin5812@126.com· 24·
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