摘要
为了明确鄂尔多斯盆地马营—纸坊地区长6、长8致密砂岩储层特征及优质储层影响因素,本文通过综合运用扫描电镜、岩石薄片、铸体薄片、压汞试验及核磁共振等分析测试资料,对研究区致密砂岩储层特征及其成因进行分析研究。结果表明,研究区长6、长8段为一套典型的低孔、低渗到特低孔、特低渗的储层,其砂岩类型主要为长石砂岩和岩屑长石砂岩,砂岩粒度小,填隙物含量较高,储集空间以小孔、微孔为主,表现出典型的致密砂岩储层特征;有利沉积相带、较大的单砂体厚度和建设性成岩作用等是形成优质储层的主要影响因素。研究区储层综合分类评价结果表明,长6段主要以Ⅱ类和Ⅲ类储层为主,长8段以Ⅳ类储层为主。长6段Ⅱ类和Ⅲ类储层分布区是相对优质储层发育区,也是该区油藏勘探开发有利区。
In order to find out the characteristics of Chang-6and Chang-8tight sandstone reservoirs and the influencingfactors of the high quality reservoirs in Ma ying-Zhifang area,Ordos Basin,in this paper,by using scanning electronmicroscope,rock flakes,and mercury injection experiment analysis of test data,have analyzed the reservoirpetrology,pore type and pore structure,reservoir characteristics and diagenesis of the study area.The results showed that the reservoir of Chang-6,Chang-8is typical low porosity and low permeability to ultra-low porosity and permeability,and its reservoir sandstone type is mainly feldspar sandstone and lithic feldspar sandstone.It has the characteristics of typical tight sandstone reservoir sandstone,such as small sandstone grain size,high interstitial material content,the reservoir space mainly with small pore or micropore,and so on.The main factors influencing the formation of high quality reservoir are favorable sedimentary facies belt,large single sand body thickness and constructive diagenesis.The results of comprehensive classification and evaluation in study area showed that the main reservoirs of Chang-6are the reservoirs of class-H and class-IH while the main reservoir of Chang-8is the reservoir of class-IV.The II and HI reservoirs development area of Chang-6is a relatively high-quality reservoir development area>and also the area of oil exploration and development favorable areas.
作者
杨传奇
刘佳庆
陈世海
王晓辉
吴江平
Yang Chuanqi;Liu Jiaqing;Chen Shihai;Wang Xiaohui;Wu Jiangping(Shaanxi Yanan Oil&Natural Gas Co.,Ltd.,Xian,Shaanxi710018,China)
出处
《非常规油气》
2017年第6期26-33,共8页
Unconventional Oil & Gas
