纤维混注加砂压裂工艺在克拉玛依油田的应用

Application of Fiber Mixed Sand Fracturing in Karamay Oilfield

针对克拉玛依油田克拉玛依组油藏地质特征，优选了全程纤维混注加砂压裂工艺作为下一步增产措施。对XJ一碳纤维进行了室内实验，评价了纤维横向固砂能力、纵向悬砂能力及混纤维支撑剂的裂缝长期导流能力，优选的纤维浓度（0．9％～1．2％）可完全满足施工携砂需要且对裂缝长期导流能力影响甚微。施工时选用国内专用纤维泵及其连接模块，降低了成本，提高了精度，增加了效率。对现场25井层的应用结果表明，进行纤维压裂措施后比措施前平均日产液量增加了3．2倍，日产油量增加了4.4倍，平均单井累计增产325t，合计累计增产8130t，效果显著。

Based on the geologic characteristics of Karamay reservoir in Karamay oilfield, the full-range fiber mixed sand fracturing tech- nology is designed as a measure for stimulation of next step. XJ-carbon fiber laboratory experiment was made for evaluation of the fiber transverse sand-consolidated property, vertical sand-suspended property and fiber-mixed proppant＇ s fracture long-term flow conductivity. The optimized fiber-mixed concentration of 0.9%-1.2% can completely meet the needs of the operating sand carrier, with little impact of its long-term flow conductivity. The selected domestic special fiber pump and its connection module reduce the cost, improve the precision and increase the efficiency. The cases study from 25 wells and layers indicates that the average daily fluid volume is increased by 3.2 times, the daily oil production increased by 4.4 times after fracturing measures than the measures before, with the incremental single well production of 325 t on average, the total incremental output of 8 130 t. The effect is remarkable.