鄂尔多斯盆地富县探区黄家岭—水磨沟延长组长8油层组储层特征研究

发布时间：2018-06-17 00:26

  本文选题：沉积相 + 储层特征　； 参考：《西北大学》2015年硕士论文

【摘要】：鄂尔多斯盆地富县探区黄家岭——水磨沟长8油层组在2009年取得突破,并圈定了含油面积,表明本区长8段良好的勘探前景,但限于本区勘探程度相对较低、分析测试资料等短缺,油藏特征等研究程度较低,制约了该区的油气勘探工作。本文在前人研究的基础上,在现代油气地质理论为指导下,通过地表地层露头剖面与地下岩心岩屑及测井资料相结合,区域资料与单井资料相结合,充分各类利用分析测试资料,从影响储层形成的区域背景、沉积体系、岩石成分、微观孔隙结构等方面,对黄家岭——水磨沟长8储层特征进行了深入研究,取得的主要认识：根据测井、岩性资料及分层标志将黄家岭—水磨沟延长组长8段进一步划分为长81、长82两个小层。长8段为三角洲前缘亚相沉积,并进一步划分为水下分流河道和分流间湾微相,平面上长82期发育有4条水下分流河道,长81期发育有3条水下分流河道。长8储层岩石主要为长石砂岩,碎屑成分以长石为主,平均为49.2%,其次为石英平均为29.4%,岩屑平均为15.8%；砂岩碎屑颗粒分选较好,磨圆度以次棱次圆为主,次棱、次圆次之；以点-线式接触为主,其次为线接触和凹凸接触；以孔隙型胶结为主,薄膜-孔隙型胶结次之。长8储层孔隙度大多介于6%-13%,平均为8.0%；渗透率大多介于0.15-0.45×10-3um2,平均为0.28×10-3um2,为特低孔、超低渗储层,具有较强非均质性；根据试油孔段层位出油情况以及声波时差—电阻率关系,研究区延长组长8’油层亚组有效油层电性下限标准为：电阻率≥23Ωm；声波时差229gs/m,长8-有效油层亚组电性下限标准为：电阻率≥19Ωm；声波时差≥228μs/m。对黄家岭—水磨沟长8储层进行综合分类评价,总的分为4类,其中长81、长82小层中Ⅲ类储层分别占53.4%、65.5%。沉积作用和储层物性是本区长8油藏分布的主控因素。
[Abstract]:The breakthrough of Huangjialing-Shuimogou Chang 8 reservoir formation in Fuxian exploration area of Ordos Basin in 2009 and the delineation of oil-bearing area indicate that the exploration prospect of Chang 8 in this area is good, but the exploration degree is relatively low in this area. The shortage of analysis and test data and the low research degree of reservoir characteristics restrict the oil and gas exploration in this area. Based on the previous studies and guided by the modern oil and gas geology theory, this paper combines the outcrop profile of the surface formation with the underground core cuttings and logging data, the regional data and the single well data. The characteristics of Huangjialing-Shuimaogou Chang 8 reservoir are studied in terms of the regional background, sedimentary system, rock composition, micro pore structure and so on. According to logging, lithologic data and stratification marks, the 8th member of Huangjialing and Shuimogou Yanchang formation is further divided into two sub-layers: Chang 81 and Chang 82. Chang 8 is a delta front subfacies deposit and further divided into underwater distributary channel and interdistributary bay microfacies. There are 4 underwater distributary channels in Chang82 stage and 3 underwater distributary channels in Chang81 period. The main rock of Chang 8 reservoir is feldspathic sandstone, the main clastic composition is feldspar, the average is 49.2, the second is quartz, and the average is 15.8. Point-line contact is the main contact followed by linear contact and concave and convex contact and pore cementation followed by thin-film pore cementation. The porosity of Chang 8 reservoir is mostly between 6 ~ 13, with an average of 8.0. The permeability of Chang8 reservoir is between 0.15-0.45 脳 10 ~ (-3) um2, with an average of 0.28 脳 10 ~ (-3) um2.It is an ultra-low porosity and super-low permeability reservoir with strong heterogeneity. The lower limit of electrical properties of the Yanchang 8'formation is as follows: resistivity 鈮，

本文编号：2028733