辽河滩海燕南潜山古生界储层特征及预测

Paleozoic Reservoir Characteristics and Prediction of Yannan Buried Hill of Liaohe Beach

为明确辽河滩海燕南潜山的有利储层并指导下步勘探方向,开展了古生界的储层研究。通过区域地层划分与对比和钻井成果,明确地层层序格架和储层微观特征;利用钻井、录井及测井资料,建立岩性及储层识别图版;根据区域应力及地震多属性分析,对储层发育有利区进行预测。研究表明:寒武系以紫红色含灰泥岩夹薄层灰岩为主,奥陶系以厚层灰岩、白云质灰岩为主;碳酸盐岩储集空间主要为裂缝及溶蚀孔洞,部分裂缝后期被方解石充填;燕南潜山南段发育A类储层,中北段发育B类储层。

Liaohe beach is an extension of Liaohe depression,and exploration degree is lower than the main body part in continental basin.As buried hill exploration for oil and gas continues in recent years,Yannan buried hill became the key target of sea exploration and for clear Yannan advantageous reservoir of buried hill and guide the lower exploration direction.Paleozoic reservoir is studied.Through regional stratigraphic division and correlation and drilling results,stratigraphic sequence framework and reservoir microscopic characteristics are clear.By using drilling and logging data,lithology and reservoir identification volume are established.According to the analysis of regional stress and seismic multi-attribute,favorable area of reservoir development is predicted.The results show that Cambrian is dominated by fuchsian-red mudstone with thin intercalated limestone;while Ordovician is dominated by thick limestone and dolomitic limestone.Carbonate reservoir space is mainly composed of fractures and dissolution holes,which are filled by calcite.Type A reservoir is developed in the south section of Yannan buried hill,while type B reservoir is developed in the middle and north section.