页岩气体积压裂数值模拟研究
Numerical Simulation Study on Shale Gas Volume Fracturing
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- 引用格式:
-
张娅妮,马新仿.页岩气体积压裂数值模拟研究[J].天然气与石油,2015,33(1):0.doi:
Zhang Yani, Ma Xinfang.Numerical Simulation Study on Shale Gas Volume Fracturing[J].Natural Gas and Oil,2015,33(1):0.doi:
- DOI:
- 作者:
- 张娅妮 马新仿
Zhang Yani, Ma Xinfang
- 作者单位:
- 中国石油大学（北京），
China University of Petroleum
- 关键词:
- 页岩气；产能预测；线网模型；裂缝参数优化；地层参数
Shale gas; Productivity prediction; Wire-mesh model; Optimization of fracture parameters; Formation parameters
- 摘要:
- 为建立合理的页岩气体积压裂水平井产能模拟模型，同时研究压裂裂缝参数及地层性质对压裂井产能的影响，通过油藏数值模拟的方法，以某口页岩气井基本参数为基础，利用椭球体状的线网模型模拟复杂的裂缝网络，并利用不可流动油中的溶解气模拟页岩中的吸附气，建立页岩气体积压裂水平井的产能预测模型。在建立模型的基础上分析页岩气体积压裂水平井储层改造体积、网状裂缝导流能力、改造体积的复杂程度等参数对产能的影响，并研究了地层渗透率非均质性等对改造井的影响。结果表明，所建模型能高效模拟实际页岩气体积压裂水平井产能。研究显示改造体积越大，裂缝的导流能力越强，主、次裂缝的间距越小，页岩气体积压裂水平井的产能越高。地层渗透率各向异性对气井产能的影响较小。所建模型对页岩气体积压裂开发效果的预测有积极意义。
In order to establish model for reasonably simulating horizontal well productivity in shale gas volume fracturing and study the effect of fracture parameters and formation property on fractured well productivity, the reservoir numerical simulation method is used to establish the productivity simulation and prediction model of shale gas horizontal well volume fracturing. The model is based on basic parameters from one shale gas well, the ellipsoid-like wire-mesh model is used to simulate complex fracture network and dissolved gas in immobile oil is used to simulate the absorbed gas in shale gas. Through using the model, analyzed is the effect of such parameters on productivity as shale gas horizontal well volume fracturing reservoir transformation, mesh fracture conductivity and transformation volume complexity and studied is the effect of formation permeability heterogeneity on transformed wells. Results show that the model can efficiently simulate actual productivity of volume fracturing in shale gas horizontal wells, the larger the transformation volume is, the stronger the fracture conductivity is; the smaller the crack spacing is, the higher the shale gas horizontal well productivity is. Formation permeability anisotropy has small effect on gas well productivity. This model has positive significance for predicting shale gas horizontal well volume fracturing development effect.
