塔中碳酸盐岩水平井酸压效果评价研究  

Evaluation on Acid Fracturing Effect of Carbonate in Tazhong

作　　者：韩剑发[1] 程汉列 王连山 

机构地区：[1]中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000 [2]恒泰艾普石油天然气技术服务股份有限公司,新疆库尔勒841000

出　　处：《河南科学》2017年第10期1622-1627,共6页Henan Science

基　　金：国家科技重大专项资助(2011ZX05049)

摘　　要：塔中奥陶系缝洞型碳酸盐岩油气藏近年来投产井中,多数井均采用水平井结合分段酸压完井投产模式,对于水平井分段酸压实质性效果以及酸压后储层渗流特征,仍缺乏相应评价研究.本文通过模拟酸压过程井底压力变化,利用裂缝净压力拟合分析,判断人工裂缝沟通天然缝洞体特征.利用分段酸压各段酸压完时井底压力与累计注入量关系,识别水平段有效沟通几个天然缝洞体.结合压力恢复不稳定试井双对数曲线特征诊断,评价酸压后储层渗流特征.最终评价出酸压未沟通、沟通大型、沟通小型和沟通亏空天然缝洞体4类模式,并建立分段酸压各段井底压力与累计注入量典型模型,归纳出酸压后2类水平井试井双对数曲线特征:曲棍球棒状(沟通天然缝洞)和典型水平井曲线(未沟通天然缝洞).为评价该区块水平井是否发挥能控制多套缝洞体井型优势以及后续措施提供理论指导.In recent years,most wells are well combined with horizontal wells and the horizontal wells are used in theproduction of the fractured carbonate reservoir in the Ordovician carbonate reservoir. By simulating the bottom holepressure in the process of acid fracturing,the fracture net pressure fitting analysis is used to determine thecharacteristics of the artificial fractures in the communication of the natural fractures. We use the piecewise segmentsof acid fracturing and acid pressure at the end of the bottom hole pressure and cumulative injection volumerelationship,and identification of horizontal section of effective communication between natural fracture cave.Combined with the characteristics of the double logarithmic curve of the unstable well test,the characteristics of thereservoir flow after acid fracturing is evaluated. We evaluate the acid fracturing does not communicate,communicatewith large and small communication and communication deficit natural fracture and cave of 4 kinds of modes,bnild thesub bottom hole pressure in pressure acid segments and cumulative injection amount of typical model,and sum up thecharacteristics of double logarithm curve of acid fracturing after two kinds of horizontal well test:the hockey stick(communication natural fracture cave)and the typical horizontal well curve(not communicate natural fracture andcave). We find for the evaluation of the horizontal well in block play can control multiple sets of fracture cavity type,and provide theoretical guidance and follow-up measures.

关 键 词：塔中 缝洞型碳酸盐岩 水平井 酸化压裂 效果评价 试井 

分 类 号：TE353[石油与天然气工程—油气田开发工程]