腰英台油田青山口组油藏压裂工艺技术研究

A Research on Fracturing Technology in the Reservoir of Qingshankou Formation,Yaoyingtai Oilfield

腰英台油田影响产能因素有多种,相继进行了两轮压裂实践,油田目前原油产量达270t/d,但存在部分井压后排液时间长,较高产量井比例较小,生产递减快,含水率偏高等问题。经过对前置酸加砂压裂和交联酸加砂压裂的应用分析,并结合腰英台油田青山口组油藏的开采现状,提出第三轮压裂应将前置酸加砂压裂或交联酸加砂压裂与薄层限缝高压裂相结合,力求实现技术综合配套。含水区块建议尝试侧钻水平井开采。

There are multiple factors to influence production capacity in Yaoyingtai oilfield,where two rounds of fracturing were conducted successively.Although now the oil production is up to 270 tons per day,several problems occurred in the oilfield,such as long time of post-fracturing flowing back in some wells,few wells with higher production,quick production declines and higher water cut.By analyzing the applications of fracturing with acid prepad and sand addition and with cross-linked acid and sand addition,and by considering the current production situation of Qingshankou Formation reservoir in the oilfield,it is proposed that the fracturing with acid prepad and sand addition or the fracturing with cross-linked acid and sand addition should be combined with the fracturing of limited fracture height in thin beds,and that horizontal wells should be attempted for oil recovery in water-bearing blocks.