摘要
传统的人工裂缝建模方法未考虑力学及施工规模等因素,模型并不能准确表征地下缝网形态。为建立更加可靠的缝网模型,提出了基于岩石力学及压裂施工参数计算的复杂缝网建模方法。在岩石力学建模及压前地应力场模拟的基础上,对泵压、排量和加砂量等压裂施工参数曲线进行拟合计算,模拟得到复杂裂缝扩展过程和最终缝网模型。实际模拟检验表明,基于该模型的生产历史拟合符合率较高,较好体现了缝网压裂后单井产量递减特征及渗流规律,可为压裂参数设计、后期注水政策调整等提供可靠依据。
The traditional artificial fracture modeling approaches do not consider the rock mechanics,the fracturing scale and the other factors,so the models can not accurately characterize the shapes of the underground fracture networks. In order to establish a more reliable fracture network model,a complex network modeling method was proposed based on the rock mechanics and calculation of the fracturing operation parameters. On the bases of the modeling of the rock mechanics and the simulation of pre-fracturing geo-stresses,the matching and calculation were conducted for the fracturing operation parameter curves including the pump pressure,discharge rate and sand added amount and so on,the complex fracture propagation process and the final complex network model were simulated are established. The actual simulation and inspection show that the model with much higher accordance rate of the history matching well reflects the decline characteristics for the individual well production and seepage laws,so it can provide the reliable evidences for the fracturing parameter design,the adjustments of the water injection policy in the late period and something else.
作者
向传刚
迟博
XIANG Chuangang;CHI Bo(Exploration and Development Research Institute of Daqing Oilfield Co Ltd.,Daqing 163712,China)
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2018年第5期153-159,共7页
Petroleum Geology & Oilfield Development in Daqing
基金
国家科技重大专项"低渗
特低渗透复杂油藏规模有效动用关键技术"(2017ZX05013-006)
关键词
缝网压裂
地应力模拟
施工参数拟合
裂缝建模
复杂裂缝
network fracturing
geo-stress modeling
operation parameter matching
fracture modeling
complex fracture/crack
