Experimental Field Works in Regulating Oil Recovery Profile in Wells of the Kozhasay Field Using Component Composition
The paper presents a brief review of hydrochloric acid treatments and factors influencing the efficiency of bottomhole zone treatment in carbonate reservoirs. The efficiency of simple and modified hydrochloric acid treatments is analyzed, and the need for employing acid inhibitors and retarders is pointed out. The explanation of the mechanisms of action of acid inhibitors and retarders is given. The resultant volume values were calculated when designing acid treatments of candidate wells in the Kozhasay field of the Republic of Kazakhstan. Information is given on acid component composition that consists of hydrochloric acid retarder and hydrochloric acid proper. The organization and process of performing experimental field works to stimulate the bottomhole zone of the productive carbonate reservoir are briefly described. The results of the works are discussed, and the conclusion is drawn about positive prospects for employing the tested technology with the use of hydrochloric acid reagent of selective action.