摘要
大牛地气田下古碳酸盐岩储层总体表现为开发难度大的低孔、低渗和低压"三低"气藏,单纯的酸化改造在PG1和PG2水平井施工效果不理想。结合酸化改造的难点以及水平井改造技术,总结前期酸化改造经验和教训,探索出酸化加砂复合压裂改造工艺技术,弥补了单一酸化和水力压裂的不足,该技术适用于大牛地下古生界碳酸盐岩储层的改造并且在PG4水平井中得到成功应用,为后续碳酸盐岩储层的改造提供借鉴。
The lower Paleozoic carbonate reservoir in Daniudi Gas Field is characteristic by low porosity, low perme- ability and low pressure which is difficult to exploit. The effects of single acidification in PG1 and PG2 are not satis- fied. Combined with the difficulties and keys of acidize and stimulation technologies of horizontal well, this paper summarizes the experience and lesson of acidification of prior period, and discusses the technology of exploring sand - adding acid fracture composite stimulation which makes a good remedy for the disadvantage of single acidize and hydraulic fracture. Composite stimulation is suitable for the lower Paleozoic carbonate reservoirs in Daniudi Gas Field and gains a successful application in PG4 horizontal well which offers reference and guidance for subsequent stimulation of carbonate reservoir.
出处
《重庆科技学院学报（自然科学版）》
CAS
2014年第3期4-7,共4页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
国家重大专项"大型油气田和煤层气开发"下属专题"大牛地致密低渗气田特殊结构井钻完井及改造技术"(2011ZX05045)
关键词
大牛地气田
碳酸盐岩储层
酸化
水力压裂
复合改造
Daniudi Gasfield
Carbonate reservoirs
acidize
hydraulic fracture
composite stimulation
