延长长6 浅油层水平缝水平井压裂参数设计 |
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引用本文: | 孟选刚,杜志敏,王香增,郝世彦,白艳改. 延长长6 浅油层水平缝水平井压裂参数设计[J]. 石油钻采工艺, 2016, 38(1): 83-87. DOI: 10.13639/j.odpt.2016.01.017 |
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作者姓名: | 孟选刚 杜志敏 王香增 郝世彦 白艳改 |
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作者单位: | 1.西南石油大学石油工程学院 |
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摘 要: | 水平井压裂技术是开发难动用低渗储层的有效手段,而对于长6 低渗浅油层实施压裂技术一般会形成水平缝(低角度),影响实际施工效果。为了指导长6 浅油层水平井的压裂设计和现场施工,把孔隙度、渗透率、含油饱和度、泥质含量和渗流系数作为主要参数,将七平1 井的水平段储层划分出5 个流动单元,进行了Ⅰ类、Ⅱ类、Ⅲ类流动单元的评价;并且根据流动单元的划分结果,完成了七平1 井压裂水平裂缝条数、裂缝位置、裂缝半长的参数设计,经过现场压裂效果分析,该设计符合延长长6 浅油层的储层特征及开发要求,单井产能大幅增加,使水平井开发在延长长6 浅油层具有可观前景。
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关 键 词: | 浅油层 水平井压裂 水平缝 裂缝参数 流动单元 |
收稿时间: | 2019-05-22 |
Horizontal well fracturing parameter design for horizontal fractures in Chang-6 shallow oil reservoirs in Yanchang Oilfield |
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Affiliation: | 1.Petroleum Engineering School of Southwest Petroleum University, Chengdu 610500, China2.Shanxi Yanchang Petroleum Group Corporation, Xi’an 716000, China3.Petroleum Engineering College, China University of Petroleum, Beijing 102249, China |
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Abstract: | Horizontal well fracturing technology is an effective way to develop the hard-to-produce low permeability reservoirs, but horizontal fractures (low angle) are usually formed when fracturing Chang-6 shallow oil reservoirs with low permeability, which affects the actual construction effectiveness. In order to better guide the field fracturing design and construction for horizontal wells of Chang-6 shallow oil reservoir, the porosity, permeability, oil saturation, shale content and seepage coefficient were used as main parameters, and the reservoirs of horizontal segment in Qiping-1 well was divided into 5 flow units, and evaluation was conducted to typesⅠ,Ⅱand Ⅲ flow units. According to the division of flowing units, the parameter design of number of horizontal fractures, fracture location, half length of fractures was completed for Qiping-1 well. The analysis of field fracturing effectiveness shows that this design meets the reservoir features and development requirement of Chang-6 shallow oil reservoirs in Yanchang Oilfield. The productivity of single well was increased greatly. Horizontal well development of Chang-6 shallow oil reservoir enjoys a favorable prospect. |
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