爆压酸化技术在海上油田挖潜增产中的应用

Application of Acidizing Assisted High Energy Gas Fracturing Technique in Well Stimulation in Offshore Oilfield

摘要: 针对珠江口盆地砂岩油藏中低渗透产层产能瓶颈问题，在陆上“三低”油气田开发过程中广泛应用的高能气体压裂技术基础上发展出了新型集成复合增产措施，即爆压酸化技术(AAHEGF)。阐述了AAHEGF大幅度提高油井产能的原理以及应用中射孔参数、火药用量及爆燃点位置选择、P-t过程设计、裂缝数量及几何参数、酸液体系及用量、深部酸化工艺、酸液挤注压力及注入速度等基本设计。LFY13-1-6井的应用效果表明，AAHEGF技术可明显提高低渗产层油井产能，改善近井地带油流通道，增产措施效果明显，可为海上油田类似低产油气井提供借鉴。

Abstract: In consideration of the problems of the productivity bottleneck of the low permeability pay-zone from sandstone reservoir in Pearl River Mouth Basin, a new type of composite well stimulation technique, Acidizing Assisted High Energy Gas Fracturing (AAHEGF) was developed based on high energy gas fracturing technology, which has been widely used in onshore oilfields during the development of oil gas fields with “three low properties”. The principles of greatly improving well productivity using AAHEGF, the perforation parameters, explosive dosage, the selection of explosion location P-t design, fracture number and geometric parameters, acid system and its dosage, deep acidizing process, acid squeezing and injection pressure and operation speed were represented. The application effect in Well LFY13-1-6 shows that the AAHEGF can be used for obviously enhancing the productivity from low permeability zone and improving oil flow passage in near well area. The stimulation effect is obvious, which provides reference for the development of similar low production gas wells in offshore oilfields.