石油钻采工艺2017，Vol.39Issue(5)：638-645,8.DOI:10.13639/j.odpt.2017.05.019
支撑剂沉降规律对页岩气压裂水平井产能的影响
Effect of proppant settlement laws on the productivity of shale-gas horizontal wells after the fracturing
摘要
Abstract
The productivity of shale gas wells is greatly influenced by proppant distribution and fracture morphology after the fracturing. To investigate the proppant settlement laws, the numerical reservoir model considering adsorption, desorption and pressure sensitivity of shale gas comprehensively was established. In this model, the method characterizing proppant settlement is developed. Then, parametric variables were compared and analyzed, e.g. perforation location, settlement degree, fracture conductivity, reservoir matrix permeability. The pressure distribution and productivity characteristics of shale gas reservoirs were studied in consideration of proppant settlement. And the main factors controlling the productivity of gas wells after proppant settlement were figured out. It is indi-cated that the productivity of gas wells is decreased greatly by proppant settlement. Considering the migration and settlement of proppant in the process of fracturing, perforation shall be carried out in the middle and lower parts of gas reservoirs. If the fracture conductivity of shale gas reservoirs is up to 4 μm2·cm, gas wells can be exploited effectively. The proppant of 40/70 mesh is selected for fracturing. It is recommended to create the main fractures preferentially. The productivity of gas wells is influenced more by proppant settlement as the matrix permeability is higher, so some measures shall be taken in high-permeability zones to prevent proppant settlement. This model takes into consideration the characteristics of proppant settlement, so it can be used as the important guide for the productivity prediction and on-site fracturing of shale gas wells.关键词
支撑剂沉降/敏感性分析/页岩气/水平井/产能Key words
proppant settlement/sensitivity analysis/shale gas/horizontal well/productivity分类
能源科技引用本文复制引用
侯腾飞,张士诚,马新仿,李栋,孙延安..支撑剂沉降规律对页岩气压裂水平井产能的影响[J].石油钻采工艺,2017,39(5):638-645,8.基金项目
国家自然科学基金"页岩气储层压裂液滞留机理与模拟研究"(编号:51504266) （编号:51504266）
高等学校博士学科点专项科研基金课题"页岩气藏大规模非对称体积改造基础理论研究"(编号:20120007110004). （编号:20120007110004）
