超大型酸压工艺技术在重复酸压中的应用  

Application of ultralarge-scale acid fracturing technology in acid refracturing

作　　者：谢远伟[1,2] 罗纯[3] 耿宇迪[1] 

机构地区：[1]中国石化西北油田分公司工程技术研究院,新疆乌鲁木齐830011 [2]中国石化销售有限公司华中分公司,湖北武汉430022 [3]长江大学地球科学学院,湖北荆州434023

出　　处：《断块油气田》2011年第6期805-808,共4页Fault-Block Oil & Gas Field

基　　金：国家科技重大专项"大型油气田及煤层气开发"(2008ZX05014-006-01)

摘　　要：酸压工艺是塔河油田碳酸盐岩油藏勘探开发核心技术之一,但由于受多种因素的影响,有近半数的井经过一次酸压仍不能获得工业油气流或仅获得较低的产能。常规重复酸压技术由于存在入井液量规模小、压裂液滤失严重等问题,导致措施有效率低,而超大型酸压工艺通过增加酸压液体用量及施工排量,可进一步提高造缝长度,突破第一次酸压作用范围,提高重复酸压的建产率。在总结前期研究成果的基础上,借助室内试验,从施工方式、泵注程序、施工规模和参数3个方面来优化超大型酸压工艺技术,有效地解决了超大型酸压施工过程中遇到的措施后导流能力下降快、施工中压裂液滤失严重等难题。现场实施效果表明,优化后的工艺达到了沟通地层深部缝洞的目的,措施有效率高,增油效果明显。Acid fracturing is one of exploration and development core technologies of carbonate reservoir in Tahe Oilfield. However, nearly half of the wells didn＇t obtain commercial oil and gas flow or only achieved a low productivity after one acid fracturing because of the effect of various factors. Conventional acid refracturing technology indicates low treatment efficiency due to the existing problems of small-scale fluid amount into well and serious fracture fluid loss. Uhralarge-scale acid fracturing technology further raises the length of created fracture, breaks through the operating range of first acid fracture and improves the acid fracturing producing rate through the increase of acid fracturing fluid amount and operating discharge rate. Based on the results of previous study, uhralarge-scale acid fracturing technology is optimized with laboratory test from the respects of operating pattern, pumping programme, operating scale and parameters. The problems of quickly-decreasing flow conductivity after treatment and serious fracturing fluid loss in the process of operation are effectively resolved during uhralarge-scale acid fracturing operation. Field operation results show that the optimized technology reaches the destination linking up the deep fracture and cave of reservoir. The measure availability is high and the increase of oil production rate is obvious.

关 键 词：超大型酸压工艺 重复酸压 施工参数 碳酸盐岩储层 塔河油田 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程]