塔河油田T738井区顺层岩溶储层特征及成因

发布时间：2018-12-21 08:11

【摘要】：塔河油田T738井区位于上奥陶统浅覆盖区,发育大型岩溶缝洞型储层。基于三维地震资料、岩心资料、成像测井资料、钻井资料,并结合地震属性提取技术,对该区储层的沉积特征和岩溶特征进行了研究,探讨了储层发育的主要岩溶阶段及主控因素,并建立了岩溶发育模式。结果表明:岩溶储层主要发育在一间房组和鹰山组上部,储集空间主要有溶蚀孔洞、裂缝和大型洞穴,具有层状分布特征;加里东Ⅰ幕形成的溶蚀孔洞和裂缝以及颗粒灰岩中保留的原生孔隙整体规模较小;在岩溶水补给条件充足、先期裂缝和溶蚀孔洞提供优势运移路径以及以深切沟谷和断裂为排泄通道的水文地质背景下,形成了顺层岩溶发育模式,为下一步储层预测和勘探实践提供了理论借鉴。
[Abstract]:Well T738 in Tahe Oilfield is located in shallow overburden area of Upper Ordovician and develops large karst fracture-cavity reservoir. Based on 3D seismic data, core data, imaging logging data, drilling data and seismic attribute extraction technology, the sedimentary and karst characteristics of reservoirs in this area are studied. The main karst stage and main controlling factors of reservoir development are discussed, and the karst development model is established. The results show that the karst reservoir is mainly developed in the upper part of Yijianfang formation and Yingshan formation, and the reservoir space is mainly composed of dissolution holes, fractures and large caves, with the characteristics of stratified distribution. The dissolution pores and fractures formed in Caledonian I and the primary pores retained in granular limestone are relatively small in scale. Under the condition of sufficient recharge of karst water, the advantage migration path provided by the pre-fracture and solution hole, and the hydrogeological background of taking deep gully and fault as drainage channel, the bedding karst development model was formed. It provides theoretical reference for reservoir prediction and exploration practice in the next step.
【作者单位】：新疆农科院土壤肥料与农业节水研究所;中国地质大学(武汉)资源学院;中石化胜利油田勘探开发研究院;长江大学地球科学学院;
【基金】：国家自然科学基金项目(41302120)
【分类号】：P618.13

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