靖边潜台南部奥陶系马五_1亚段储层特征研究  

Study on reservoir characteristics of Ordovician Majiagou 5~1 sub-member in south Jingbian platform

作　　者：昌俊杰[1] 罗顺社[1] 王正允[1] 魏新善[2] 门福信[1] 

机构地区：[1]油气资源与勘探技术教育部重点实验室长江大学,湖北荆州434023 [2]中国石油长庆油田分公司勘探开发研究院

出　　处：《石油地质与工程》2008年第5期41-43,共3页Petroleum Geology and Engineering

摘　　要：鄂尔多斯盆地奥陶纪时为稳定的克拉通内凹陷盆地.其马家沟组为一套古风化壳的岩溶地貌,蕴藏着丰富的天然气资源。靖边潜台南部马五_1时总体上为局限台地环境,主要岩石类型为泥-细粉晶白云岩及含硬石膏结核溶模孔白云岩.由于储集层储集类型为风化壳岩溶型,针对这一特点从微观和宏观两方面阐述了储集空间类型及特征,并对马五_1各小层之间的物性特征进行了分析比较.得出马五_1储层总体具有低孔低渗的特点。通过从沉积和储层两方面特征的研究揭示了影响储层储集性能的控制因素为岩性与沉积微相、古岩溶地貌和成岩作用。Ordos basin was a stable kratogenic inner depressed ba- sin in the Ordovician period.Majiagou Formation in Ordos basin is a karst palaeogeomorphology,with abundant natural gas resources.Majiagou 51 sub-member belongs to re- stricted platform setting,its main rock types are mud-thin crystal powder dolomite and nodwlar anhydrite dolomite.In view of the reservoir as a weathering crust karst0 the micro- scopic and microcosmic types and the characteristics of reser- voir spaces are elaborated,and the physical properties of ho- rizons in Majiagou 51 sub-member are analyzed compara- bly.It is concluded that Majiagou 51 sub-member is char- acterized by low porosity and low permeability.The above studies on characteristics of sedimentation and reservoir sug- gest that the factors controlling reservoir's storage and pres- ervation ability are lithologyo sedimentary microfacies,karst palaeogeomorphology and diagenesis.

关 键 词：鄂尔多斯盆地 马家沟组 古岩溶 碳酸盐岩 白云岩 储层 控制因素 

分 类 号：TE112.23[石油与天然气工程—油气勘探]