Foundation of the Reaction Mechanism of Deep Penetration and Low-Damage Acidizing Fluid

Jigang WANG, Rujia YIN, Qingwang LIU, Zhenzhong FAN


With the development of oil and gas resources to inefficient and multiple rounds measure reservoir development, with deep penetration characteristics of low-damage acid system acidification and acid fracturing technology more and more research is very important. "Deep penetration and low-damage Acidizing fluid" system has some advantage which a slower etch rate, etch depth, no secondary damage, reservoir reconstruction obvious effect, acid-rock reaction kinetics parameters such testing and etching acid system mechanism is the basis of the depth of acidification and acid fracturing work. With deep penetration and low-damage Acidizing fluid system formulation, through new experimental device for etching experiments carried reservoir core, on the basis of Hekim distributed parameter model is proposed the reaction mechanism of deep penetration and low-damage acidizing fluid in the reservoir. The key consideration during the construction of deep penetration and low-damage acidizing fluid in the formation of continuous hydrolysis HF, detailed derivation of the body acid, HF concentration distribution and concentration distribution of mineral mathematical models and numerical models.


The reaction mechanism of acidizing fluid; Acidification model; Concentration distribution model; Concentration distribution numerical model; Numerical analogue

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