致密油藏水平井固井技术研究

发布时间：2018-05-05 22:58

本文选题：韧性膨胀防窜水泥浆 + 长水平段固井　；参考：《东北石油大学》2015年硕士论文

【摘要】：吉林油田致密油藏,前期采用小井眼裸眼滑套钻完井一体化技术开发取得了良好效果,为了进一步提高致密油藏单井产能,借鉴国外多簇压裂技术,将在水平井试验多簇压裂固井完井提高产能技术。多簇压裂需要水平段采用固井完井方式,对固井质量和水泥环性能要求高,但由于长水平段固井施工难度大,特别是水平段体积改造施工压力高,对水泥环胶结质量和抗冲击强度高,目前长水平段水平井固井质量是制约多簇压裂实施效果的瓶颈。通过该课题利用纤维和膨胀剂的微膨胀性能能够防止水平段上部出现微间隙,提高二界面胶结强度;纤维增韧性能为后续体积改提供力学性能优良的水泥环的特性。将纤维和膨胀剂进入水泥浆中来改善水泥浆和水泥石的综合性能,完成韧性膨胀防窜水泥浆体系的研发,同时找到压裂施工压力与水泥环胶结质量和完整性规律。再好的水泥浆体系也要有配套的固井工艺与之配合发挥其优势,现场利用漂浮固井技术保证其顶替效率,利用振动固井技术把水泥浆性能进一步提升,进一步提高固井质量和胶结质量,并现场成功施工,固井水泥环质量满足体积压裂改造要求。
[Abstract]:In order to further improve the single well productivity of tight reservoir in Jilin Oilfield, the well drilling and completion integration technology with small hole slip-casing was adopted in the early stage. In order to further improve the productivity of single well in dense reservoir, the foreign multi-cluster fracturing technology was used for reference. Multi-cluster fracturing cementing completion technology will be tested in horizontal wells to improve productivity. Multi-cluster fracturing requires cementing completion in horizontal section, which requires high cementing quality and cement ring performance. However, because of the difficulty of cementing operation in long horizontal section, especially the high pressure of horizontal section volume modification, The cementing quality and impact strength of cement ring are high. At present the cementing quality of horizontal wells in long horizontal section is the bottleneck restricting the effect of multi-cluster fracturing. The micro-expansion property of fiber and expansive agent can prevent the microgap in the upper part of the horizontal section and improve the bonding strength of the two interfaces. The fiber toughening property provides the properties of cement ring with excellent mechanical properties for the subsequent volume modification. In order to improve the comprehensive properties of cement slurry and cement stone, the research and development of toughness expansion and anti-channeling cement slurry system is completed, and the rules of fracturing pressure and cementation quality and integrity of cement ring are found at the same time. No matter how good the cement slurry system is, it is necessary to have a complete set of cementing technology to play its advantages, to ensure its displacement efficiency by using floating cementing technology on the spot, and to further improve the performance of cement slurry by using vibration cementing technology. The cementing quality and cementing quality are further improved, and the field operation is successful. The cementing cement ring quality can meet the requirements of volume fracturing.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE256

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