Logging Identification of Volcano-Related Rocks and Its Application in Provenance Analysis——An Example from the Yingcheng Formation in Shiwu Oilfield in Southern Songliao Basin
详细信息
- 责任者：Shen Yanjie (College of Earth Sciences ; Jilin University ; Changchun 130061 ; China) ; Cheng Rihui
- 刊名：Journal of Jilin University
- 出版年：2012
- 卷期：42(3)
- 关键词：岩性油气藏 ; lithologic reservoir ; 物源分析 ; provenance analysis ; 测井曲线 ; logging curves ; 松辽平原 ; Songliao Plain
- 页码：p.590-599
- 图表：4 illus., 2 tables, 18 refs.
- 分类号：1600
- issnNo：ISSN1671-5888
- isbnNo：CN22-1343/P
摘要
The Shiwu oilfield in Songliao basin is a structural lithological hydrocarbon reservoir.There are some kinds of rocks developed in the Yingcheng Formation in Shiwu oilfield,such as sedimentary rock,lava,tuff,sedimentary tuff and tuffaceous sandstone.Each kind of rocks contains a certain amount of volcanic fragments.The content of volcanic material often determines rock type and makes lower reservoir properties.Types of volcanogenic rocks and their identification reflect the characteristics of the source area.Lithologicalidentification with core is accurate,however,the number and distribution of core and drill is limited,which has made it difficult to determine the types of source sedimentary system and its distribution.Lithology identificationusing logging information,especially for volcanic clastic rocks,can make up for the lithological identification restrictions caused by inadequate coring.Lithology identification is carried out by comparison of Potassium logging content of rocks in the different layer,the logging parameter crossplot of Uranium,Thorium of rocks in the same layer,the rose diagram of logging curves of GR,DEN,CNL,AC,Rt,RMSFL and the crossplot diagram of GR-PE,GR-DEN.Lithology identification of volcano-related rocks has been done effectively and the logging recognition pattern has been established in member Ⅳ-Ⅴof the Yingcheng Formation in Shiwu oilfield.The combination of lithology identification using logging and core has made 5 kinds of rocks types be determined,and the existence and distribution of sediments system are dominated by volcanic provenance,the normal clastic provenance derived from recycled sediments,affected by granite,affected by granite and volcanic rocks together,and mixed provenance in Member Ⅳ-Ⅴ of Yingcheng Formation in Shiwu oilfield.