杨璐 1刘宇 1秦玲 1贺莨 1周继龙 1陶帅 1方越1
作者信息
- 1. 中国石化河南油田分公司勘探开发研究院,河南 南阳 473400
- 折叠
摘要
Abstract
In Block B304 of Zhawa Oilfield in the Biyang Sag,the development effect is poor due to the con-straints of complex geological conditions.The plane sand bodies change rapidly,and the lithology and oil-bearing properties are unevenly distributed.In order to improve the recovery rate,based on sedimentary mi-crofacies analysis and integrating data from drilling cores,mud logging,well logging,and oil/gas testing and production,the four-property characteristics of glutenite reservoir were clarified,and differential clas-sification evaluation was carried out.The results show that the reservoir lithology in the study area is rela-tively rich,dominated by conglomerate,with the development of silty mudstone,silt-fine sandstone,and medium-coarse sandstone.Moreover,there are big differences in reservoir physical properties and oil-bearing properties among different sedimentary microfacies and rock types.The study area is divided into four types:type I is mainly sandstone facies,featuring good physical properties and oil-bearing capacity.They are the dominant reservoirs in the study area,primarily distributed in the central-western part.Type II and III are dominated by glutenite facies with higher mud content,resulting in relatively poorer reservoir physical properties.Their oil-bearing grades are mainly fluorescent and oil trace,with widespread planar reservoir development.Type IV is composed of matrix-supported coarse conglomerate and argillaceous silt-stone facies,characterized by high mud content,poor physical properties,and fluorescent oil-bearing properties.They are only locally developed in the southern part of the study area.The results were applied in the field,guiding the deployment of 4 new wells and optimizing the production technology.As a result,the cumulative oil increment reached 1.31×104 tons,the oil recovery rate increased from 0.40%to 0.78%,and the development effect was effectively improved.The research results provide a good reference for the effective development of similar glutenite reservoirs.关键词
赵凹油田/核桃园组/四性特征/储层分类/差异性Key words
Zhaowa Oilfield/Hetaoyuan Formation/four-property characteristics/reservoir classification/differences分类
石油、天然气工程
