川东北元坝地区飞三段鲕粒滩相储层分析

fei- three sections oolitic beach facies reservoir analysis in Northeastern sichuan yuan-ba area

元坝地区飞三段鲕粒滩相储层厚度薄、分布广，是重要的勘探远景目标。预测鲕粒滩储层分布是现阶段首要任务，区内鲕粒滩沉积相有两种类型：即台缘鲕粒滩坝微相和鲕粒边滩微相，台缘鲕粒滩相常因白云石化及溶解作用形成各类次生孔隙，成为良好的储集层，发育于古构造高的台缘亚相，地震反射呈平行一断续反射特征；鲕粒边滩微相发育于斜坡和陆棚亚相，地震反射呈斜交反射特征。因此，从鲕粒滩相带研究出发，分析鲕粒滩相地震响应特征，识别出工区内高能相一飞三段台缘鲕粒滩坝微相发育区。再结合古构造分析，确定有利于溶蚀孔隙发育的高部位鲕粒滩位置，最后，利用地震多属性综合预测滩体发育区，预测出工区中部是台缘鲕粒坝相鲕粒滩储层最发育的地区，是勘探开发的首选目标区。

Yuan-ba area fei-three sections oolitic beach facies reservoir thickness thin, wide distribution, is an important ex- ploration prospect target. Prediction oolitic beach reservoir distribution is the primary task, zone oolitic beach sedimentary facies have two types： namely platform margin oolitic beach dam microfacies and oolitic beach microfacies, in platform margin oolitic bank dolomitization was often the role in the formation and dissolved all kinds of secondary pore, become good reservoir, growth in the ancient tectonic high platform margin and phase, seismic reflection is parallel- concentres reflective characteristic; Oolitic beach microfacies development in slope and shelf and phase, seismic reflection show oblique reflective characteristic. Therefore, from oolitic beach facies belt research, analy^es oolitic beach seismic response characteristics, recognition in high energy phase needed zone platform margin three section includes microfacies oolitic beach development zone. Combine ancient tectonic analy- sis, determine pore development for dissolution of high position oolitic bank position, finally, using seismic multi-attribute syn- thetic prediction beach body development area, predict district central is platform margin oolitic dam phase oolitic beach of the reservoir area, it is the development of exploration and development zone of choice.