Composite acid fracturing construction pipe column and application method

Abstract

The invention provides a composite acid fracturing construction pipe column and an application method, and belongs to the technical field of underground fracturing operation technologies. The composite acid fracturing construction pipe column comprises at least one spray gun with a sliding sleeve, a slotted pipe and a hollow guide head, the spray guns with the sliding sleeves are connected in sequence, the lower end of the last spray gun with the sliding sleeve is connected with the upper end of the slotted pipe, and the lower end of the slotted pipe is connected with the hollow guide head. Bymeans of the method, subsection reconstruction of different construction modes such as large-scale acid fracturing, fixed-point jet perforation, jet fracturing and the like is sequentially completedon a long open hole section by one pipe column, the layering and subsection reconstruction effects of clastic rock in an oil field are improved, the swept volume and complexity of the reconstructed fracture of a clastic rock reservoir are improved, and the fracturing yield increasing effect is improved. Mechanical packing is not needed, the pipe column structure is simple, the tool reliability andsafety are high, the pipe column meets different functional requirements, the construction continuity is good, the construction time is saved, the construction cost is reduced, and the oil field development effect is improved.

Description

technical field [0001] The invention belongs to the technical field of downhole fracturing operations, and in particular relates to a composite acid fracturing construction string and an application method, which is suitable for the transformation of various vertical wells, horizontal wells, open hole wells, cased wells and other well types of clastic rocks. measure work. Background technique [0002] The deep carbonate matrix in the Tahe Oilfield is dense and of low grade, but small-scale natural fractures and caves are relatively well developed. Large-scale acid fracturing was used during the development process to communicate and develop sweet spots. The well types are mainly directional wells and horizontal wells, and most of the production well sections are completed by open hole, most of which are relatively long. At present, general acid fracturing is mainly used, and general acid fracturing in long well sections is likely to cause reservoir development Layers are ov...

AI Technical Summary

Problems solved by technology

[0004] However, none of the existing hydraulic jet fracturing string construction methods can meet the needs of staged reconstruction operations in different construction methods such as deep wells in oil fields, large-scale acid fracturing in long open hole sections, and fixed-point jet fracturing.

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