The discovered sinian-Jurassic producing formations in Sichuan basin are essentially fractured carbonate resevoirs. Based on the geological Characteristics of the resevoirs, this paper presents briefly the mechanism of acid fracturing, the Condition of progress in the research on acid fracturing fluids, the field operation conditions of matrix acidizing and acid fracturing respectively, the influence of formation selection and accumulation conditions on the results of acidization. The paper shows that the acid fracturing method is an effective stimulation measure for the carbonate strata in Sichuan.

The acid fracturing procedure exhibits poor effect on the low-permeable area. many technical problems remain to be solved. The technical experiments being made on the scene, such as padfluid acid fracturing and acid fracturing with refarded fluids would open up a new way for the modification of low-permeable area.

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