致密气藏复杂裂缝压裂技术  

FRACTURING TECHNIQUE FOR THE COMPREHENSIVE CRACK IN THE TIGHT GAS RESERVOIR

作　　者：金成志[1] 张玉广[2] 尚立涛[2] 邓大伟[2] JIN Chengzhi;ZHANG Yuguang;SHANG Litao;DENG Dawei(Daqing Oilfield Co Ltd. , Daqing 163311, China;Research Institute of Oil Production Engineering of Daqing Oilfield Co Ltd., Daqing 163453, China)

机构地区：[1]大庆油田有限责任公司,黑龙江大庆163311 [2]大庆油田有限责任公司采油工程研究院,黑龙江大庆163453

出　　处：《大庆石油地质与开发》2018年第1期154-158,共5页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家重大科技专项"大型油气田及煤层气开发"(2011ZX05001-001-004);中国石油天然气股份公司重大科技专项"大庆探区非常规油气勘探开发关键技术研究与现场试验"(2012E-2603)

摘　　要：大庆油田深层致密砂砾岩储层直井采用常规凝胶加砂压裂技术施工13口井,存在施工规模大、压裂后产量低的问题。分析认为由于储层致密,有效渗流距离短且应力差大,压裂形成单一裂缝,导致改造体积较小。因此,结合储层岩石脆性高的特点,利用水平井人工裂缝的相互干扰来降低应力差,并采用复杂裂缝压裂工艺扩大裂缝改造体积,提高单井产能。通过参数对比,水平井施工规模为直井7.8倍,压裂后产量是直井的17倍。应用情况表明该压裂增产工艺技术可行,为致密气储层的高效勘探开发提供了有力的技术支持。13 vertical wells were stimulated by the conventional gel and the granulated substance fracturing technology in the deep tight conglomerate reservoir of Daqing Oilfield,the following operational problems were shown：the scale in a big way and lower production after the frac. The rather smaller fractured volume was analyzed and the reasons were due to the tight reservoir,shorter effective flow distance,rather bigger stress difference and the reduced single fracture. Therefore integrating with the high brittleness characteristic of the reservoir rock and with the help of the mutual disturbance among the artificial fractures in the horizontal well,the stress difference was reduced,and moreover by means of complex crack fracturing technology,the stimulated fracture volume was enlarged and the productivity of the individual well was enhanced. Through the parameter contrast,the operational scale of the horizontal well is 7. 8 times of that of the vertical well,while the production after the frac is up to 17 times. The practice shows that the stimulating technology by the fracturing is feasible and provides the powerful technical support for the high-efficiency exploration and development of the tight gas reservoir.

关 键 词：复杂裂缝体系 脆性指数 人工裂缝干扰 致密气藏改造 压裂增产 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]