深层碳酸盐岩储层酸压工艺技术现状与展望

Actuality and Outlook of Acid-fracturing Technique in Deep Carbonate Formation

分析了深层碳酸盐岩储层酸压改造存在的技术难点,综述了国内外深层碳酸盐岩储层酸压改造工艺和酸液体系的最新进展,包括酸压改造的作用机理、技术特点及应用范围。重点阐述了国内外深度酸压技术和复合酸压技术的发展,以及复合酸压技术在我国几个典型深层或超深层碳酸盐岩油田的成功应用情况。并指出国内外深层碳酸盐岩储层酸压技术的发展特点是已由单一酸液体系向复合酸液体系发展,酸压工艺已由单级注入向多级交替注入发展。最后提出了深层碳酸盐岩储层酸压技术存在的问题,并指出分层酸压、变粘酸酸压和水平井酸压是今后深层碳酸盐岩储层酸压改造发展的方向。

This paper analyzes the technical challenges in acid-fracturing operation in carbonate reservoirs, describes the newest advance of acid-fracturing techniques and acid-fluid systems on deep carbonate formation, including mechanism on acid-fracturing, technical feature, and application limit. The development of large-scale acid-fracturing technique and compounding acid-fracturing technique has been emphasized, and compounding acid-fracturing technique has been applied successfully in several typical deep carbonate reservoirs。 The advance feature of acid-fracturing technique in deep carbonate reservoirs is indicated, including acid-fluid system from the single to the mixing, injection stage from one stage to several stages. Finally, the confronted problem is put forward. Separate-layer (segment) acid-fracturing technique, LCA technique, and horizontal acid-fracturing technique are development direction in the future.