塔河油田超大型复合酸压降滤失技术研究

为满足塔河油田碳酸盐岩储层超大型复合酸压增产改造的技术需要，对0.15 mm 粒径粉陶、油溶性暂堵降
滤剂和可降解纤维降滤失剂进行了室内实验评价。加入粉陶较不加粉陶15 min 滤失量下降了近2 L，滤失速度由
3.3×10-6 m/min 下降到2.0×10-6 m/min；油溶降滤剂的暂堵率大于85%；可降解纤维降滤剂在80～120 ℃，降低液体滤
失量37.70%～22.99%。结合储层特征与工艺技术要求以及粉陶不同粒径组合的渗透率实验测试结果，优选0.150 mm
粒径粉陶作为塔河油田超大型复合酸压降滤失剂。基于粉陶对天然裂缝的不同作用方式分析，优化粉陶加入浓度为
10% 左右，按由小到大逐级加入，并结合了支撑段塞和裂缝形态优化了粉陶降滤量，在TH12227H 井进行矿场试验取
得了满意的效果。研究结果对塔河油田超大型酸压具有重要的指导意义。

Technology Research About Super Large Composite Acid Fracturing Filtration in Tahe Oilfield

Abstract：In order to meet the needs of super large composite acid fracturing stimulation technology of the carbonate reservoirs
in Tahe Oilfield ，the particle size of 0.150 mm ceramic powder，oil soluble temporary plugging agent and biodegradable fiber
were evaluated in laboratory as filtrate reducer. Ceramic powder can decrease the filtrate loss by nearly 2 L in 15 min compared
with no ceramic powder，the filtration rate drop from 3.3×10-6 m/min down to 2.0×10-6 m/min；oil soluble temporary plugging
agent more than 85%；biodegradable fiber filtration reducing agent，reduce the liquid filtrate volume by 37.70%～22.99% when
temperature is at 80～120 ℃. Given reservoir characteristics and technological requirements of ceramic powder of different
particle size and of the permeability test results，we found that a 0.150 mm particle size powder pottery is applicable to Tahe
Oilfield super large composite acid. Based on the analysis of different action mode of ceramic powder on natural fracture，
ceramic powder was added around 10%，in ascending sequential order. Based on proppant slugs technique principle and fracture
shape，the ceramic powder amount is optimized. In Well TH12227H field test，satisfactory results were obtained，which have
an important guiding significance.