金龙2井区致密油藏井间压窜识别及分析

doi:10.7657/XJPG20250209

摘要/Abstract

摘要： 准噶尔盆地西部隆起中拐凸起金龙2井区致密油藏采用水平井水力压裂缝网开采，受大规模加密井和储集层断裂带影响，井间压窜现象频发，极大地影响生产效率。通过调研和探讨多段压裂水平井井间压窜监测识别方法的适用性，结合金龙2井区现场压裂施工监测和生产资料，建立了一套综合考虑生产动态、压裂施工和微地震特征的井间压窜识别流程，并对研究区井间压窜进行识别和分析。结果表明：金龙2井区井间压窜现象严重，不仅存在同层位和同断块压窜，也存在跨层位和跨断块压窜；金龙2井区水平井井距较小和储集层断层发育，会诱发井间压窜，应避免在大规模断裂区域加密布井，也应适当减小加密井压裂规模。

关键词: 准噶尔盆地, 西部隆起, 中拐凸起, 上乌尔禾组, 致密油藏, 水平井, 水力压裂, 井间压窜

Abstract:

The tight oil reservoir in the Jinlong 2 well block in the Zhongguai bulge, western uplift of the Junggar Basin, is developed by horizontal well hydraulic fracturing. Frequent inter-well frac-hit caused by the large-scale well infilling and the presence of fault zones in the reservoir impedes production efficiency greatly. By investigating the applicability of monitoring and identification methods for inter-well frac-hit in multi-stage fractured horizontal wells, and combining field fracturing monitoring and production data from the Jinlong 2 well block, a comprehensive identification workflow for inter-well frac-hit was established. This workflow which integrates production performance, fracturing operation, and microseismic characteristics was used to identify and analyze inter-well frac-hit in the study area. The results show that severe inter-well frac-hit exists in the Jinlong 2 well block, not only within but also across individual horizons and fault blocks. The relatively small horizontal well spacing and developed fault system in the reservoir in the Jinlong 2 well block may induce inter-well frac-hit. It is recommended to avoid well infilling in large-scale fault zones and reduce fracturing scale for infill wells.

Key words: Junggar Basin, western uplift, Zhongguai bulge, upper Urhe formation, tight oil reservoir, horizontal well, hydraulic fracturing, inter-well frac-hit

中图分类号:

TE348

黄后传, 曹晓璐, 李宁, 加玉锋, 吴国龙, 巨世昌. 金龙2井区致密油藏井间压窜识别及分析[J]. 新疆石油地质, 2025, 46(2): 201-207.

HUANG Houchuan, CAO Xiaolu, LI Ning, JIA Yufeng, WU Guolong, JU Shichang. Identification and Analysis of Inter-Well Frac-Hit in the Tight Oil Reservoir of Jinlong 2 Well Block, Junggar Basin[J]. Xinjiang Petroleum Geology, 2025, 46(2): 201-207.

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压窜井		关联井			压窜井段级数	压窜井平均日产油量/t		压窜井平均日产水量/m³		井间压窜识别方法
井名	压裂井段级数	井名	压裂日期/ 年-月-日	压窜时间/ 年-月	压窜井段级数	压窜前 3个月	压窜后 3个月	压窜前 3个月	压窜后 3个月	井间压窜识别方法
J2-11井		J2-32井 J2-33井	2021-05-22	2021-05		9.24	20.07	7.45	28.89	生产动态曲线、RTA图版
J2-11井		J2-42井 J2-43井	2022-05-24	2022-05		12.99	1.87	13.43	10.28	生产动态曲线、RTA图版
J9-21井	10	J2-42井 J2-43井	2022-05-24	2022-05	3—5、7—8	12.24	8.96	3.87	10.48	生产动态曲线、RTA图版、压裂施工曲线
J9-21井	10	J9-44井 J9-45井	2022-06-09	2022-06	3—5、7—8	11.19	3.95	5.16	43.81	生产动态曲线、RTA图版、压裂施工曲线
J2-31井	12	J2-42井 J2-43井	2022-05-24	2022-05	1—2、4—5、 8—9	17.93	5.34	13.98	47.39	生产动态曲线、RTA图版、压裂施工曲线
J2-32井	18	J2-33井	2021-05-22	2021-05	1—3、6、9—17					微地震监测数据
J2-32井	18	J9-45井 J2-46井	2022-06-16	2022-06	1—3、6、9—17	13.62	8.94	33.36	69.39	生产动态曲线、RTA图版、压裂施工曲线
J2-33井	18	J2-32井	2021-05-22	2021-05	1—3、6、9—17					微地震监测数据
J2-33井	18	J9-45井 J2-46井	2022-06-16	2022-06	1—3、6、9—17	18.86	3.41	19.42	62.48	生产动态曲线、RTA图版、压裂施工曲线