黔北安页1井石牛栏组储层特征及压裂改造效果评价

Shiniulan Formation Characteristics and Fracturing Effect Evaluation of Anye-1 Well in North of Guizhou

黔北安页1井首次在我国南方志留系石牛栏组取得发现和突破,石牛栏组地层为一套深水混积陆棚沉积地层,岩性以浅灰色灰岩夹钙质泥岩不等厚薄互层为主,储层厚度大,泥质含量高,层理缝较发育。本文在详细解剖其储层特征基础上提出针对该类储层的压裂改造思路,创新性应用了大规模体积压裂改造工艺,通过压后效果评价,总结石牛栏组储层压裂改造技术经验,对后期该层系的勘探开发具有重要指导意义。

Objectives： Anye-1 well made great discoveries and breakthroughs of Silurian Shiniulan Formation in South China for the first time. This paper want to evaluate the fracture effect of Shiniulan Formation in Anye-1 well,and to conclude the fracture technology experience to guide future exploration.Methods： After analysis the characteristics of Shiniulan Formation,we put forward many new reservoir reconstruction ideas such as the innovative application of large-scale volume fracturing technology. Through evaluate the fracturing curve and Fracture fitting,we give some reservoir fracture advices to such reservoir.Results： Shiniulan Formation is a deep-water mixed continental shelf sedimentary strata,the lithology mainlyis light gray limestone with calcareous mudstone interbedded unequal thickness. The thickness is thick with high shale content,and the bedding seams and natural fractures are developed. After big scale fracture,long and complex fractures were built so the gas production can get to more than 100 thousand cube meters per day.Conclusions： Through evaluate the reservoir and fracturing effect we can say that Shiniulan Formation is good reservoir stratum and the fracture technology is very effect in this area and can be applied in the future.