川东南五峰组-龙马溪组页岩气目标评价及水平井设计技术

川东南地区五峰组-龙马溪组具有良好的页岩气勘探开发潜力,利用实验、地震、测井、钻井及压裂等资料,以页岩气甜点目标评价为主线,开展地质-物探、地质-工程一体化研究,结合勘探开发实践,明确了地质综合评价、甜点目标评价体系及水平井地质-工程一体化设计等目标评价技术系列。甜点目标评价体系是以“三因素控气”地质认识为指导,建立甜点目标评价体系和标准,优选有利目标。水平井地质-工程一体化设计技术是通过优化水平井部署和压裂设计,穿好层、压好缝,提高单井产量。通过目标评价技术集成及应用,形成固定做法、固化成熟技术,高效指导川东南地区五峰组-龙马溪组页岩气勘探开发。

The Research of shale gas target evaluation techniques and horizontal well design technology of Wufeng-Longmaxi Formation in southeast Sichuan

The shale gas exploration and development potential of the Wufeng - Longmaxi formation in southeast Sichuan is good. Based on experimental, seismic, logging, drilling and fracturing data, taking the evaluation of shale gas sweet spot target as the main line, study on the integration of geology-geophysical exploration and geology-engineering, ,combining with the practice of exploration and development, a series of target evaluation techniques have been defined, such as geological comprehensive evaluation, sweet spot target evaluation system and geology-engineering integration design of horizontal wells. The sweet spot target evaluation system is guided by the geological knowledge of "three factors controlling reservoir", to establish the evaluation system and standard of the sweet spot target, and select the favorable target. The geology-engineering integration design of horizontal wells is through optimizing the deployment of horizontal wells and fracturing design, allowing the trajectory to travel better through the formation and create more fractures, to improve single well production. Through the integration and application of target evaluation techniques, to form fixed practices and mature technologies, the exploration and development of shale gas in Wufeng - Longmaxi formation in southeast Sichuan can be efficiently guided.