大情字井油田青一段特低渗透储层物性主控因素

1.西安石油大学 地球科学与工程学院,陕西 西安 710065; 2.中国石油集团测井有限公司 长庆事业部,陕西 西安 710201

地质资源与地质工程; 储层物性; 统计分析; 特低渗透; 青一段

Factors influencing the physical properties of reservoir in the Qing 1 section of Daqingzijing Oilfield
LIU Zhi-di1,ZHANG Wei-jie2,SUN Jia-xing1,ZHANG Peng1,CHANG Xue-tong1

(1.School of Earth Sciences and Engineering,Xi'an Shiyou University,Xi'an 710065,China; 2.Changqing Business Division,China Petroleum Logging Ltd.,Xi'an 710201,China)

geological resources and geological engineering; reservoir physical properties; statistical analysis; ultra-low permeability; Qing 1 section

DOI: 10.13800/j.cnki.xakjdxxb.2018.0115

备注

为研究地质作用对特低渗透储层物性的影响,查明影响储层物性的主控因素,提高油气勘探的成功率,依托岩心观察、岩心物性分析化验和薄片鉴定等资料,选取岩性、沉积、溶蚀、胶结、构造及埋深6个影响因素,采用地质统计学和参数交会图相关分析等方法,对松辽盆地大情字井油田青一段特低渗透储层物性影响因素进行了系统研究。结果 表明:青一段储层物性存在一定的差异,具有低孔-特低孔、特低渗-超低渗的特点; 岩性、沉积相是影响储层物性的最重要主控因素,细砂岩较其他岩性的物性好,邻近沉积物源的井区物性较好,远离沉积物源的井区物性相对较差; 溶蚀作用和胶结作用从建设性和破坏性两方面均对储层物性有较大的影响,碳酸盐、泥质胶结是导致储层孔隙度、渗透性变差的一个重要影响因素; 构造作用仅在断层附近能够改善储层的渗透性能,而远离断层的井区物性几乎不受构造作用的影响; 随埋深增加,储层孔隙度和渗透率降低趋势均不明显,揭示出埋深对储层物性影响较小的特征。

In order to study the effects of geological processes on the physical properties of ultra-low permeability reservoirs,find out the main factors influencing the reservoir physical property and improve the success rate of oil and gas exploration,based on core observation,statistics of core physical properties data and thin section identification,six factors which are lithology,deposition,dissolution,cementation,structure and depth were selected,using geological statistics and correlation analysis of parameter crossplot methods,the factors influencing the physical properties ofreservoir in the Qing 1 section of Daqingzijing Oilfield were systematically studied.The results indicate that the physical property of reservoir in the study area have some differences,and show the characteristics of the low pore-extra low porosity,low permeability-extra low permeability.Lithology and sedimentary facies are the most important main control factors of reservoir property,fine sandstone is better than other lithology,the physical property of reservoir in sediment source area is better,but the physical property of reservoir in sedimentary frontal area is relatively poor.Dissolution and cementation have a large effect on reservoir physical property.Only near the fault,tectonic setting can improve the permeability of the reservoir,and away from the fault of well block,the reservoir property is almost not affected by tectonic action.With the increase of buried depth,the decrease trend of reservoir porosity and permeability are not obvious,and it shows that the buried depth is of less affect on the physical property of reservoir.