第34卷第4期 2017年7月
钻井液与完井液
DRILLINGFLUID& COMPLETIONFLUID
doi: 10.3969/j.issn.1001-5620.2017.04.020
Vol.34 No.4 July2017
酸压裂缝中酸液微观流动数值模拟及分析
刘享1，伊向艺1.2，吴元琴1，李沁
（1.成都理工大学能源学院，成都610059；2.油气藏地质及开发工程国家重点实验室，成都610059）
囊阀
特商
LuXa
inaci
折[钻共减与完共减，
2017, 34 (4): 106-111
niero flow of acids in fractures generated
（2017）04-0106-06
001-5620
Numerical Simulation and Analysis of Micro Flow of Acids in Fractures Generated in Acid Fracturing
LIU Xiang', Yi Xiangyil-2, WU Yuanqin', LI Qin*
(1. College of Energy Resources, Chengdu University of Technology, Chengdu, Sichuan 610059;2. State Key Laboratory of
Oil and Gas Reservoir Geology and Exploitation, Sourthwest Petroleum University, Chengdu, Sichuan 610059)
Abstract Acid fracturing is an important stimulation measure used in enhancing oil recovery. The understanding of flow of acids in fractures generated in reservoir fracturing is of great importance. Physical experiments have been conducted previously in the study of acid flow in fractures, and the fracture model used in the experiments are quite different than the actual fractures generated in acid fracturing, the effects of the roughness of the surfaces of fractures on acid flow are seldom considered. This paper introduces the use of a software Fluent to numerically simulate acid flow in fractures, and analyzes the effects of the roughness of the surfaces of fractures on acid flow. Experimental results showed that the flow rate curves of both single-phase flow and two-phase flow along the horizontal
central axis demonstrated a shape of
flow rates around wave
n
while along the vertical central axis, the curve showed a shape of*L". In single-phase flow
than the flow
On the other hand, in two-phase flow, highest flov
of firactures, the length of flow of acid i
extendec
s were found alon:
central
d the flow rate along the central axes were low With an increase in roughness of the surfaces
At the same roughness, the flow length of acid and acid viscosity are not in linea
relationship. When M = 6, the flow lengths of acid in fractures with 4 different
urface roughness all are the shortest. When M < 6, the
flow lengths decrease with increase in viscosity ratio. When M > 6, the flow lengths increase with increase in viscosity ratio. A plateat appears with M between 8 and 11, meaning that the effects of viscosity ratio on acid flow length are becoming weak. Increase in acid flow length increases the length of acid erosion, foms more cannelures, thereby enhancing the flow conductivity of fractures and
基金项目：国家自然科学基金青年基金“碳酸董岩储层酸着反应表面形态与演化”（51504200）。
第一作者简介：刘享，1991年生，在读硕士研究生，研究方向为储层保护与储层改造。电话18208182201；E-mail：
1119579833 @qq.com。万方数据