摘要
为准确评价页岩气多级压裂水平井的实际产能,针对实际压裂裂缝形态,分别采用“水平井+缝网”模型和“水平井+缝网+主裂缝”模型进行研究,对比分析结果显示两种产能的预测模型曲线形态特征相似,但产能的差异性较大。为准确讨论两种模型的适用性,选取实际页岩气井生产数据进行历史拟合,结果表明不同模型对于不同页岩气井拟合的效果不同,两种模型具有不同的适用性,“水平井+缝网”模型适用于裂缝网络复杂程度较高的页岩气井,“水平井+缝网+主裂缝”模型更适用于主裂缝明显的页岩气井。两种模型的探讨为不同压裂裂缝形态的页岩气井选择产能预测模型提供了理论支撑,同时可以根据拟合效果准确预测页岩气井的压裂效果,在产量预测上具有先进性。
In order to precisely evaluate the actual capacity of multi-stage fracturing horizontal well in shale gas reservoirs,“the horizontal well+network”model and“the horizontal well+network+main fracture”model were studied respectively by considering the actual fracture morphology.The results indicate that the two kinds of productivity prediction models have the similar shape characteristics of the gas production curves,but their productivity differs largely.Moreover,to identify the applicability of the two models,the history matching study is conducted using the actual shale gas well production data.The results show that the two models have different fitting effects for different shale gas wells and different applicability.“The horizontal well+network”model is suitable for the shale gas well with high fracture network complexity,while“the horizontal well network+main fracture”model is more appropriate for the shale gas well with main fracture.This study provides a theoretical support for choosing the productivity prediction models of shale gas wells with different fracture morphologies.At the same time,the fracturing effect of shale gas well can be accurately predicted according to the fitting effects and this method has advancements in the production prediction.
作者
辛翠平
白慧芳
张磊
穆景福
谢小飞
施里宇
周伟
Xin Cuiping;Bai Huifang;Zhang Lei;Mu Jingfu;Xie Xiaofei;Shi Liyu;Zhou Wei(Research Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd., Xi'an, Shaanxi 710075, China;School of Earth Science and Resources, Chang'an University, Xi'an, Shaanxi 710054, China)
出处
《非常规油气》
2020年第3期65-71,共7页
Unconventional Oil & Gas
基金
国家自然科学基金项目“盐度响应型水包稠油乳状液的构建及其在多孔介质中的运移行为研究”(51804036)
中央高校基本科研业务费专项资金项目“致密油藏环保型可循环使用压裂液体系构筑”(300102279304)联合资助。
关键词
页岩气
多级压裂水平井
裂缝形态
产能预测模型
应用效果
shale gas
multistage fracturing horizontal well
fracture morphology
productivity prediction model
application effect
