土库曼斯坦阿姆河右岸酸性气田酸化增产技术评估

Evaluation of acidizing stimulation in sour gas field on the right bank of Amu Darya

晏军 程维恒 陈彦东 宋亮 楚敬伟

YAN Jun CHENG Weiheng CHEN Yandong SONG Liang CHU Jingwei

中国石油勘探开发研究院廊坊分院，河北廊坊　065007 中国石油土库曼斯坦阿姆河天然气公司，北京　100101

Research Institute of Petroleum Exploration and Development-Langfang, Langfang 065007, China PetroChina Turkmenistan Amu Darya natural gas company, Beijing 100101, China

土库曼斯坦阿姆河右岸是一个高含硫化氢和二氧化碳的复杂底水块状碳酸盐岩气田。气田储层类型多样，非均质性严重，根据储层特征，实施了以常规酸与转向酸酸化相结合的增产措施。对现场24 井次的酸化作业进行了系统的施工参数分析和技术评估。采用Paccaloni 评估方法计算了酸化后表皮系数，根据曲线特征将施工曲线分为5 类，分别为明显解堵型、明显漏失型、突破后漏失型、双层突破型和未明显突破型。通过表皮系数变化、曲线特征分析及措施效果对比对储层进行深入认识，进一步优化了对阿姆河右岸气田酸化措施的适用条件和施工参数，对提高气田二期开发的增产效果具有重要意义。

Amu Darya Right Bank gas field, Turkmenistan is a complex faultblock gas field with bottom water, high in hydrogen sulfide and carbon dioxide content. The reservoirs are diverse in types and strong in heterogeneity. According to reservoir characteristics, the stimulation combining conventional acidizing with diverting acidizing was developed and carried out. The operation parameters and technologies of 24 wells acidized were systematically assessed. Paccaloni evaluation method was used to calculate skin factor after acidizing, the treatment curves were divided into five categories according to the curve characteristics, namely, obvious plugging removal type, obvious loss type, loss after plugging removal type, double plugging removal type and non-obvious breakthrough type. The analysis of the skin factor variation, curve characteristics and comparison of stimulation effect gave better understanding on the reservoir. The applicable conditions and treatment parameters of acidizing in the Amu Darya right bank gas field were further optimized, which is very important for improving stimulation effect in the stage II of the gas field development.

10.13639/j.odpt.2014.02.026