石油地质与工程2025，Vol.39Issue(6)：6-11,6.DOI:10.26976/j.cnki.sydz.202506002
川东地区寒武系统洗象池组储层特征
Reservoir characteristics of the Xixiangchi Formation,Upper Cambrian in the East Sichuan Area
李世临 1张文济 1张静 2胡忠贵 3任晓莉4
作者信息
- 1. 中国石油西南油气田公司重庆气矿,重庆 400707
- 2. 中国石油西南油气田公司川中油气矿,四川 遂宁 629000
- 3. 长江大学地球科学学院,湖北 武汉 430100
- 4. 四川长宁天然气开发有限责任公司,四川 成都 610056
- 折叠
摘要
Abstract
Well PQ1 in the East Sichuan Area has achieved a high-yield industrial gas flow of 20×104 m3 in the test of the Xixiangchi Formation of the Upper Cambrian,which has opened up a new situation for the ex-ploration and development of Lower Paleozoic natural gas in the East Sichuan Area.Based on core,cut-tings,outcrop,and logging data of the Xixiangchi Formation in the study area,a systematic study was con-ducted on the reservoir characteristics and main controlling factors.The results show that the reservoir rock types of the Xixiangchi Formation are mainly granular dolomite and crystalline dolomite,and the reservoir space types are mainly karst caves,intergranular pores,intercrystalline dissolved pores,and fractures.Mul-tiple sets of dolomite reservoirs are developed in the Xixiangchi Formation,with strong physical heterogenei-ty and poor matrix physical properties.The pore structure is of the fine-pore and fine-throat type,charac-terized by small pore-throat radius and poor connectivity.The capillary pressure curve has no flat segment and shows a fine skewness.Granular dolomite serves as the material basis for the continuous post-deposi-tional modification of reservoirs.Dissolution is the key factor for the development of reservoir pores,and granular banks constitute the most favorable facies belt for reservoir development.关键词
川东地区/寒武系/洗象池组/储层特征/控制因素Key words
Eastern Sichuan/Cambrian/Xixiangchi Formation/reservoir characteristics/controlling factors分类
能源科技引用本文复制引用
李世临,张文济,张静,胡忠贵,任晓莉..川东地区寒武系统洗象池组储层特征[J].石油地质与工程,2025,39(6):6-11,6.
