闭合酸蚀裂缝导流能力模拟研究

赵立强; 缪尉杰; 罗志锋; 龚云蕾; 汪鹏; 李屹洋

doi:10.13809/j.cnki.cn32-1825/te.2019.02.006

• 石油工程 • | 浏览量 : 0 下载量: 0 CSCD: 0 CNKI被引量: 9 Scopus: 0 更多指标

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闭合酸蚀裂缝导流能力模拟研究
Simulation study on conductivity of closed acid cracks
2019年9卷第2期页码：25-32
纸质出版：2019
DOI： 10.13809/j.cnki.cn32-1825/te.2019.02.006
稿件说明：

移动端阅览

赵立强, 缪尉杰, 罗志锋, 等. 闭合酸蚀裂缝导流能力模拟研究[J]. 油气藏评价与开发, 2019,9(2):25-32. DOI： 10.13809/j.cnki.cn32-1825/te.2019.02.006.

Zhao Liqiang, Miao Weijie, Luo Zhifeng, et al. Simulation study on conductivity of closed acid cracks[J]. Petroleum Reservoir Evaluation and Development, 2019, 9(2): 25-32. DOI： 10.13809/j.cnki.cn32-1825/te.2019.02.006.

摘要

酸蚀裂缝导流能力是影响酸压改造效果的关键所在。由于岩石性质、刻蚀形态及闭合压力等因素影响

很难对酸蚀裂缝导流能力进行准确的预测。目前

对于酸蚀裂缝几何形态和酸穿距离的计算模型较多

而就酸蚀裂缝导流能力的计算模型研究较少。为此

基于自仿射分形理论建立裂缝酸压模型

进行酸压模拟

利用局部立方规律（LCL）对闭合酸蚀裂缝导流能力进行预测

对影响闭合酸蚀裂缝导流能力的主要因素进行了正交模拟计算。结果表明

影响闭合酸蚀裂缝导流能力主要因素的影响程度从大到小依次为：闭合压力分形维数注酸时间地层基质渗透率注酸排量标准偏差地层基质孔隙度。

Abstract

The conductivity of acid cracks was the key to the transformation effects of acid fracturing. Due to the influences of rock properties

etching morphology and closing pressure

it was difficult to accurately predict the conductivity of acid fractures. Currently

there were many computational models for acid fractures geometry and acid penetration distance

but there were few researches on the computational model of flow capacity. For this reason

we built the acid fracturing model of cracks based on the improved self-affine fractal theory and applied it to the fractal fractures. And then

by the local cubic law（LCL）

we built the acid fracture conductivity calculation model and applied the quadrature analysis to the main factors which affected the conductivity of the acid fracture after closure. The results showed that the influencing degree of those factors which affected the acid fracture conductivity were as follows: closure stressfractal dimensioninjection timematrix permeabilityinjection ratestandard deviationmatrix porosity.