星级管理在复杂高含水气田地质工程一体化开发中的应用

doi:10.13809/j.cnki.cn32-1825/te.2021.03.006

摘要/Abstract

摘要：

低品位、高含水、高成本等因素制约着鄂尔多斯盆地东胜气田的效益开发,针对以上难点,首次提出了星级管理理念,即以储量价值和投资效益最大化为目标,以地质工程一体化为手段,从勘探、开发、钻井、工程、生产5个维度对井位井网、钻井方式、压裂工艺、生产工艺等进行链条式优化,通过各个板块之间实时/适时反馈,实现从单井到区块再到全气田的全尺度迭代提升,最终以各单井的收益率作为星级评判标准排序实施。在此基础上,依托于智慧气田的建设,应用星级管理成果,将地下到地面进行有机结合,从而实现全气田整个生命周期内更高层次的地质工程一体化,取得以下主要成果：①形成了复杂高含水气藏精细描述方法,气层钻遇率提高20.8 %;②建立了“分级约束”井网优化体系,储量动用率提高28 %;③创新“井、震、测”一体化井壁稳定、井间协同防漏、小井眼窄间隙固井等技术,钻井周期缩短51 %、投资成本降低31 %;④采用“大排量、短时间、高砂比”压裂,直井、水平井产量增幅分别达56 %和39 %;⑤创新“多参数定量识别、两相耦合、泡排+、同井采注”技术组合,含气饱和度动用下限降至45 %。“十三五”以来,东胜气田经济效益指标持续向好,形成了可量化、可操作、可评价的地质工程一体化效益开发模式,具备推广价值。

关键词: 星级管理, 地质工程一体化, 高含水气田, 难动用储量, 压裂

Abstract:

Poor reserve quality, high water-cut and high investment cost have become the bottleneck of developing Dongsheng Gas Field located in Ordos Basin. In this way, the star evaluation management model is put forward to enhance its production performance. It is aiming at maximizing reserve value and investment benefits through geology-engineering integration. In the process of its implementation, the well locations, well patterns, drilling, fracturing and production technologies are optimized comprehensively, then the optimizedinformation is employed to improve and instruct future planning, thus the iterative improvement is achieved from single well to the whole gas field. Finally, the internal rate of return is calculated to determine the implementation sequence for each well. On the base of intelligent gas field construction, the above achievements are reinforced by organically combining downhole management with ground coping facilities, then the higher level of integrated development of geological engineering is realized. The following main results have been achieved: ①The detailed reservoir description and evaluation methods are formed for complicated high water-cut reservoir, and the gas layer penetrating rate raises by 20.8 %. ②Hierarchical constraints system for well network optimization is established, and the reserve production rate increases by 28 %. ③The drilling technology with both borehole stability and leakage prevention being considered is innovated through the combination of logging and seismic technology, and a completion string with slim hole and narrow gap is optimized to cater its demand. After optimization, the drilling cycle is shorten by 51 %, and investment cut by 31 %. ④The “large displacement, short time and high sand ratio” fracturing method is implemented, with the vertical well output increased by 56 %, and horizontal well 39 %. ⑤The “multi-parameter quantitative identification, coupling of nozzle and pipe flow, foam drainage and gas recovery system and production and injection technology in the same well” is combined together to lower the utilization limit of gas saturation to 45 %. Ever since the 13th Five-Year Plan, the production indicators of Dongsheng Gas Field are continuously improved. Moreover, a quantitative, operative and evaluable geology-engineering integration development model, with actual value of promotion, is formed.

Key words: star evaluation management, geology-engineering integration, high water-cut gas field, hard-to-recover reserves, fracturing

中图分类号:

TE122

刘小波,周涌沂,王智等. 星级管理在复杂高含水气田地质工程一体化开发中的应用[J]. 油气藏评价与开发, 2021, 11(3): 317-328.

Xiaobo LIU,Yongyi ZHOU,Zhi WANG, et al. Implementations of star evaluation management model in complex high water-cut gas field during its integrated development of geological engineering[J]. Petroleum Reservoir Evaluation and Development, 2021, 11(3): 317-328.

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井型	经济评价	类比法	干扰评价	数值模拟评价	非均质评价法	砂体构型分析法	综合
直井	极限井距600	700~750	620	700	650~880	600~700	600~700
水平井	极限井距670	800~1 000	700	700~970	800~950	600~1 000	700~850