曙北—高升地区沙四段储层特征研究

发布时间：2018-02-08 14:05

本文关键词： 曙北-高升地区储层特征沉积体系储层预测　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：辽河坳陷西部凹陷曙北-高升地区沙四段是目前勘探程度较低的地区之一,自二十世纪九十年代以来一直没有较大的突破,其主要原因为储层岩性复杂、非均质性强、物性较差,造成各类油藏油气富集程度差异较大,并且油质较稠,开采效果较差,这些因素都在不同程度上影响了油气勘探工作的深入开展。随着勘探和开发技术水平的提高和创新,通过进一步深入开展综合地质研究工作,尤其对复杂储层特征刻画亟待深入,望在致密油气勘探领域中有新的发现和突破。本文主要针对工区内沙四段杜家台油层组及高升油层组特征、沉积体系、储层特征等进行了系统的研究。研究结果表明:研究区沙四段划分为高升油层组、杜家台油层下油层组、杜家台油层上油层组,三个油层组平面分布总体上东南部厚,西北部薄。沙四段主要发育滨浅湖亚相、深湖—半深湖亚相,滨浅湖亚相发育有浅滩和泥质浅湖2个微相,深湖-半深湖亚相发育有泥质湖底、泥灰质湖底、泥云质湖底和云灰质湖底4个微相。沙四段储集岩类型有云岩类、泥岩类;储集空间类型有晶间溶孔、溶孔、溶洞和裂缝;储层类型有孔隙-裂缝型、裂缝型和裂缝-孔洞型;储层物性最好的是泥晶粒屑云岩,为中高孔中低渗,其余都为低孔低渗。沙四段杜家台油层发育含泥含方沸石云岩、含泥泥晶云岩和含云含方沸石泥质岩三种优势储层,高升油层发育泥晶粒屑灰岩、泥质泥晶灰岩和云质页岩三种优势储集岩,预测了相应优势储集岩的分布范围。
[Abstract]:The Sha 4 member of Shubei Gaosheng area in the western depression of Liaohe depression is one of the low exploration areas at present. There has been no great breakthrough since 1990s. The main reason is that the reservoir lithology is complex and the heterogeneity is strong. Poor physical properties, resulting in greater oil and gas enrichment in various types of reservoirs, thicker oil quality and poor recovery, These factors have affected the further development of oil and gas exploration to varying degrees. With the improvement and innovation of exploration and development technology, comprehensive geological research is carried out further. In particular, the characterization of complex reservoir features needs to be deepened, and new discoveries and breakthroughs are expected in the field of tight oil and gas exploration. This paper mainly focuses on the characteristics and sedimentary systems of the Dujiatai formation and the Gaosheng oil formation of the fourth member of Shahejie formation in the working area. The results show that the fourth member of Sha formation in the study area is divided into Gaosheng reservoir formation, lower reservoir formation of Dujiatai reservoir, upper reservoir formation of Dujiatai reservoir, and three reservoir groups, and the plane distribution of the three formations is generally thick in the southeast. Shallow lacustrine subfacies, deep lacustry-semi-deep lacustrine subfacies, shoal and muddy shallow lake subfacies, deep lacustry-semi-deep lacustrine subfacies, muddy lake bottom and muddy lake bottom are mainly developed in the fourth member of the northwest. There are four microfacies in muddy lake bottom and cloud-lime-lacustrine bottom. The reservoir rock types of the fourth member of Sha formation are dolomite and mudstone, the reservoir space types are intergranular dissolved pore, dissolved pore, solution hole and fracture, the reservoir type is pore-fracture type, fracture type and fission-pore type, and the reservoir type includes pore fracture type, fracture type and fracture pore type, reservoir space type includes intergranular dissolved pore, dissolved pore, solution hole and fracture. The best physical properties of the reservoir are mud-grain dolomite, which is medium high porosity and low permeability, and the others are low porosity and low permeability. There are three dominant reservoirs in the Dujiatai reservoir of the fourth member of Sha, which are mud-bearing andalite dolomite, mud-mud-crystal dolomite and cloud-bearing andalite mudstone. There are three dominant reservoir rocks in the Gaosheng reservoir, I. e., mudstone, argillaceous martensitic limestone and cloud shale, and the distribution range of the corresponding dominant reservoir rocks is predicted.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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