川渝地区页岩气勘探开发工程技术集成与规模化应用

自2009年四川盆地长宁—威远国家级页岩气示范区第1口井开钻以来,经过8年的探索和实践,中国的页岩气勘探开发工程技术取得了长足的进步和全面的发展。及时总结所优化集成的页岩气勘探开发工程配套技术,对于"高效益、高效率"推进川渝地区页岩气规模开发具有重要的意义。研究结果表明:(1)形成并完善了10项页岩气钻完井工程主体技术系列,整体处于国内领先水平,为页岩气规模上产提供了技术支撑;(2)形成了从设计到室内实验评价、井中地震压裂缝网实时监测的体积压裂配套技术,保证了页岩气增产方案的实施效果;(3)创新形成了钻井—压裂、钻井—采输、压裂—采输等同步作业模板,优化平台布置,实现"批量化、模块化、程序化、一体化"作业,大幅度加快了页岩气井的投产进度;(4)形成6项页岩气开发环保节能技术,实现了页岩气清洁节能生产;(5)形成了以高精度三维地震勘探技术为基础的技术体系,为打造"透明"气藏奠定了基础;(6)优化地面集输工艺,实现了气藏采输智能化、数字化管理。结论认为,所形成的页岩气勘探开发配套工程技术有效支撑了长宁—威远国家级页岩气示范区的页岩气上产,在技术进步和管理创新等方面都具有引领示范作用。

Integration and scale application of shale gas exploration and development engineering technologies in Sichuan and Chongqing areas

Based on 8 years' exploration and production since the spud in of the first shale gas well in the Changning–Weiyuan national demonstration zone in the Sichuan Basin in 2009, great progress and all-sided development have been achieved in shale gas exploration and development engineering technologies in China. In order to promote scale shale gas development efficiently with high benefits in Sichuan and Chongqing areas, it is of great significance to summarize in time the optimized and integrated support technologies of shale gas exploration and development engineering. And the following research results were obtained. First, 10 principal technology series at the domestic leading level in shale gas well drilling and completion engineering are formed and completed , providing a technical support for a drastic increase of shale gas production. Second, volumetric fracturing support technologies from design to laboratory experiment evaluation and to real time monitoring of fracturing networks based on borehole seismic data are developed, ensuring the implementation effects of shale gas stimulation schemes. Third, simultaneous operation modes are innovatively established, such as drilling–fracturing, drilling–production&transportation and fracturing–production&transportation, and pad arrangement is optimized so that batch, modularized, programmed and integrated operation is realized and the commissioning schedule of shale gas wells is sped up greatly. Fourth, six series of environmental protection and energy saving technologies for shale gas development are developed, and consequently clean and energy saving production of shale gas is realized. Fifth, a technological system with a high-precision 3D seismic prospecting technology as the base is established to provide a basis for the realization of "transparent" gas reservoirs. Sixth, ground gathering technologies are optimized and intellectual and digital management of gas reservoir production and transportation is realized. It is concluded that these support technologies for shale gas exploration and development engineering provide an effective support for the increase of shale gas production of the Changning–Weiyuan shale gas national demonstration zone and they play a guiding and demonstrating role in technological progress and managerial innovation.