砂砾岩油藏水流优势通道定量识别与表征——以克拉玛依油田X区克下组为例

Quantitative identification and characterization of dominant flow channels in glutenite reservoirs: taking the Lower Karamay Formation in X area of Karamay Oilfield as an example

窦琰,陈平,庞艳君,黄亮,李志军,丁洋洋

中国石油新疆油田分公司风城油田作业区，新疆 克拉玛依 834000 中国石油大庆油田有限责任公司第一采油厂，黑龙江 大庆 163111 中国石油西南油气田分公司勘探开发研究院，四川 成都 610041 中国石油新疆油田分公司百口泉采油厂，新疆 克拉玛依 834000 重庆科技学院，重庆 401331

Operation Area of Fengcheng Oilfield, Xinjiang Oilfield Company, PetroChina, Karamay 834000, China No.1 Oil Production Plant, Daqing Oilfield Co., Ltd., PetroChina, Daqing 163111, China Exploration and Development Research Institute, Southwest Oil and Gas Field Company, PetroChina, Chengdu 610041, China Baikouquan Oil Production Plant, Xinjiang Oilfield Company, PetroChina, Karamay 834000, China Chongqing University of Science and Technology, Chongqing 401331, China

砂砾岩油藏水流优势通道一般是在开发后期因长期注水开发而形成，其非均质性和储层性质已发生较大变化。为准确识别水流优势通道，并且建立可运用推广的标准化定量表征技术，文中以克拉玛依油田X区克下组为例，结合地质资料和开发动态数据，通过灰色关联系数、秩相关系数、井间阻力系数等参数和日注水量统计分析，根据累积概率分布规律及二八现金分流原则对水流优势通道等级进行划分。研究表明：砂砾岩油藏的孔隙体积、渗透率、注水强度、注水量、注采比是表征水流优势通道的重要动静态参数；渗透率大于950×10-3 μm2，渗透率的级差大于70，变异系数大于0.75，突进系数大于4.2等可作为水流优势通道的主要识别标准。该研究成果对于后期注聚方案调整及提高聚驱试验效果具有重要意义。

The dominant flow channels of glutenite oil reservoirs are normally formed due to long-term water injection at the late stage of oilfield development, and its heterogeneity and the reservoirs properties have changed greatly. In order to precisely recognize the dominant flow channels and establish applicable and generalizable standardized quantitative characterization techniques, taking the Lower Karamay Formation in X area of Karamay Oilfield as an example, combining the static geological data and dynamic data of the oilfield development, by coefficient of Grey Relational Analysis, Rank Correlation and Drag Coefficient between wells and daily injection volume analysis, this paper classifies the dominant flow channels according to cumulative probability distribution law and the 20/80 rule. The research shows that the pore volume, permeability, water injection intensity, water injection multiple and injection-production ratio of glutenite reservoir are important dynamic and static characterization parameter of dominant flow channels. Permeability greater than 950×10-3 μm2, permeability level difference greater than 70, coefficient of variation greater than 0.75, and thrust coefficient greater than 4.2 are the main identification criteria for dominant flow channels. The result of the research has great significance to the adjustment of polymer injection scheme and the improvement of polymer flooding test results.

10.6056/dkyqt202201014